diff --git a/csaxs_bec/devices/omny/galil/galil_ophyd.py b/csaxs_bec/devices/omny/galil/galil_ophyd.py
index d0c9fa2..f05325e 100644
--- a/csaxs_bec/devices/omny/galil/galil_ophyd.py
+++ b/csaxs_bec/devices/omny/galil/galil_ophyd.py
@@ -4,6 +4,7 @@ This module contains the base class for Galil controllers as well as the signals
 
 import functools
 import time
+from typing import Any
 
 from bec_lib import bec_logger
 from ophyd.utils import ReadOnlyError
@@ -347,7 +348,7 @@ class GalilSignalBase(SocketSignal):
     def __init__(self, signal_name, **kwargs):
         self.signal_name = signal_name
         super().__init__(**kwargs)
-        self.controller = self.parent.controller
+        self.controller = self.root.controller if hasattr(self.root, "controller") else None
 
 
 class GalilSignalRO(GalilSignalBase):
diff --git a/csaxs_bec/devices/omny/galil/galil_rio.py b/csaxs_bec/devices/omny/galil/galil_rio.py
index aa20fdf..dc599d7 100644
--- a/csaxs_bec/devices/omny/galil/galil_rio.py
+++ b/csaxs_bec/devices/omny/galil/galil_rio.py
@@ -6,24 +6,26 @@ Link to the Galil RIO vendor page:
 https://www.galil.com/plcs/remote-io/rio-471xx
 
 This module provides the GalilRIOController for communication with the RIO controller
-over TCP/IP. It also provides a device integration that interfaces to these
-8 analog channels.
+over TCP/IP. It also provides a device integration that interfaces to its
+8 analog channels, and 16 digital output channels. Some PLCs may have 24 digital output channels,
+which can be easily supported by changing the _NUM_DIGITAL_OUTPUT_CHANNELS variable.
 """
 
 from __future__ import annotations
 
-import time
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Literal
 
 from bec_lib.logger import bec_logger
-from ophyd import Component as Cpt
+from ophyd import DynamicDeviceComponent as DDC
+from ophyd import Kind
+from ophyd.utils import ReadOnlyError
 from ophyd_devices import PSIDeviceBase
 from ophyd_devices.utils.controller import Controller, threadlocked
 from ophyd_devices.utils.socket import SocketIO
 
 from csaxs_bec.devices.omny.galil.galil_ophyd import (
     GalilCommunicationError,
-    GalilSignalRO,
+    GalilSignalBase,
     retry_once,
 )
 
@@ -35,15 +37,11 @@ logger = bec_logger.logger
 
 
 class GalilRIOController(Controller):
-    """
-    Controller Class for Galil RIO controller communication.
-
-    Multiple controllers are in use at the cSAXS beamline:
-    - 129.129.98.64 (port 23)
-    """
+    """Controller Class for Galil RIO controller communication."""
 
     @threadlocked
     def socket_put(self, val: str) -> None:
+        """Socker put method."""
         self.sock.put(f"{val}\r".encode())
 
     @retry_once
@@ -64,21 +62,95 @@ class GalilRIOController(Controller):
             )
 
 
-class GalilRIOSignalRO(GalilSignalRO):
+class GalilRIOAnalogSignalRO(GalilSignalBase):
     """
-    Read-only Signal for reading a single analog input channel from the Galil RIO controller.
-    It always read all 8 analog channels at once, and updates the reabacks of all channels.
-    New readbacks are only fetched from the controller if the last readback is older than
-    _READ_TIMEOUT seconds, otherwise the last cached readback is returned to reduce network traffic.
+    Signal for reading analog input channels of the Galil RIO controller. This signal is read-only, so
+    the set method raises a ReadOnlyError. The get method retrieves the values of all analog
+    channels in a single socket command. The readback values of all channels are updated based
+    on the response, and subscriptions are run for all channels. Readings are cached as implemented
+    in the SocketSignal class, so that multiple reads of the same channel within an update cycle do
+    not result in multiple socket calls.
 
     Args:
-        signal_name (str): Name of the signal.
-        channel (int): Analog channel number (0-7).
-        parent (GalilRIO): Parent GalilRIO device.
+        signal_name (str): The name of the signal, e.g. "ch0", "ch1", ..., "ch7"
+        channel (int): The channel number corresponding to the signal, e.g. 0 for "ch0", 1 for "ch1", ...
+        parent (GalilRIO): The parent device instance that this signal belongs to.
     """
 
     _NUM_ANALOG_CHANNELS = 8
-    _READ_TIMEOUT = 0.1  # seconds
+
+    def __init__(self, signal_name: str, channel: int, parent: GalilRIO, **kwargs):
+        super().__init__(signal_name=signal_name, parent=parent, **kwargs)
+        self._channel = channel
+        self._metadata["connected"] = False
+        self._metadata["write_access"] = False
+
+    def _socket_set(self, val):
+        """Read-only signal, so set method raises an error."""
+        raise ReadOnlyError(f"Signal {self.name} is read-only.")
+
+    def _socket_get(self) -> float:
+        """Get command for the readback signal"""
+        cmd = "MG@" + ", @".join([f"AN[{ii}]" for ii in range(self._NUM_ANALOG_CHANNELS)])
+        ret = self.controller.socket_put_and_receive(cmd)
+        values = [float(val) for val in ret.strip().split(" ")]
+        # Run updates for all channels. This also updates the _readback and metadata timestamp
+        # value of this channel.
+        self._update_all_channels(values)
+        return self._readback
+
+    # pylint: disable=protected-access
+    def _update_all_channels(self, values: list[float]) -> None:
+        """
+        Method to receive a list of readback values for channels 0 to 7. Updates for each channel idx
+        are applied to the corresponding GalilRIOAnalogSignalRO signal with matching attr_name "ch{idx}".
+
+        We also update the _last_readback attribute of each of the signals, to avoid multiple socket calls,
+        but rather use the cached value of the combined reading for all channels.
+
+        Args:
+            values (list[float]): List of new readback values for all channels, where the
+                index corresponds to the channel number (0-7).
+        """
+        updates: dict[str, tuple[float, float]] = {}  # attr_name -> (new_val, old_val)
+        # Update all readbacks first
+        for walk in self.parent.walk_signals():
+            if isinstance(walk.item, GalilRIOAnalogSignalRO):
+                idx = int(walk.item.attr_name[-1])
+                if 0 <= idx < len(values):
+                    old_val = walk.item._readback
+                    new_val = values[idx]
+                    walk.item._metadata["timestamp"] = self._last_readback
+                    walk.item._last_readback = self._last_readback
+                    walk.item._readback = new_val
+                    if (
+                        idx != self._channel
+                    ):  # Only run subscriptions on other channels, not on itself
+                        # as this is handled by the SocketSignal and we want to avoid running multiple
+                        # subscriptions for the same channel update
+                        updates[walk.item.attr_name] = (new_val, old_val)
+                else:
+                    logger.warning(
+                        f"Received {len(values)} values but found channel index {idx} in signal {walk.item.name}. Skipping update for this signal."
+                    )
+
+        # Run subscriptions after all readbacks have been updated
+        # on all channels except the one that triggered the update
+        for walk in self.parent.walk_signals():
+            if walk.item.attr_name in updates:
+                new_val, old_val = updates[walk.item.attr_name]
+                walk.item._run_subs(
+                    sub_type=walk.item.SUB_VALUE,
+                    old_value=old_val,
+                    value=new_val,
+                    timestamp=self._last_readback,
+                )
+
+
+class GalilRIODigitalOutSignal(GalilSignalBase):
+    """Signal for controlling digital outputs of the Galil RIO controller."""
+
+    _NUM_DIGITAL_OUTPUT_CHANNELS = 16
 
     def __init__(self, signal_name: str, channel: int, parent: GalilRIO, **kwargs):
         super().__init__(signal_name, parent=parent, **kwargs)
@@ -87,81 +159,83 @@ class GalilRIOSignalRO(GalilSignalRO):
 
     def _socket_get(self) -> float:
         """Get command for the readback signal"""
-        cmd = "MG@" + ",@".join([f"AN[{ii}]" for ii in range(self._NUM_ANALOG_CHANNELS)])
+        cmd = f"MG@OUT[{self._channel}]"
         ret = self.controller.socket_put_and_receive(cmd)
-        values = [float(val) for val in ret.strip().split(" ")]
-        # This updates all channels' readbacks, including self._readback
-        self._update_all_channels(values)
+        self._readback = float(ret.strip())
         return self._readback
 
-    def get(self):
-        """Get current analog channel values from the Galil RIO controller."""
-        # If the last readback has happend more than _READ_TIMEOUT seconds ago, read all channels again
-        if time.monotonic() - self.parent.last_readback > self._READ_TIMEOUT:
-            self._readback = self._socket_get()
-        return self._readback
+    def _socket_set(self, val: Literal[0, 1]) -> None:
+        """Set command for the digital output signal. Value should be 0 or 1."""
 
-    # pylint: disable=protected-access
-    def _update_all_channels(self, values: list[float]) -> None:
-        """
-        Update all analog channel readbacks based on the provided list of values.
-        List of values must be in order from an_ch0 to an_ch7.
+        if val not in (0, 1):
+            raise ValueError("Digital output value must be 0 or 1.")
+        cmd = f"SB{self._channel}" if val == 1 else f"CB{self._channel}"
+        self.controller.socket_put_confirmed(cmd)
 
-        We first have to update the _last_readback timestamp of the GalilRIO parent device.
-        Then we update all readbacks of all an_ch channels, before we run any subscriptions.
-        This ensures that all readbacks are updated before any subscriptions are run, which
-        may themselves read other channels.
 
-        Args:
-            values (list[float]): List of 8 float values corresponding to the analog channels.
-                                  They must be in order from an_ch0 to an_ch7.
-        """
-        timestamp = time.time()
-        # Update parent's last readback before running subscriptions!!
-        self.parent._last_readback = time.monotonic()
-        updates: dict[str, tuple[float, float]] = {}  # attr_name -> (new_val, old_val)
-        # Update all readbacks first
-        for walk in self.parent.walk_signals():
-            if walk.item.attr_name.startswith("an_ch"):
-                idx = int(walk.item.attr_name[-1])
-                if 0 <= idx < len(values):
-                    old_val = walk.item._readback
-                    new_val = values[idx]
-                    walk.item._metadata["timestamp"] = timestamp
-                    walk.item._readback = new_val
-                    updates[walk.item.attr_name] = (new_val, old_val)
+def _create_analog_channels(num_channels: int) -> dict[str, tuple]:
+    """
+    Helper method to create a dictionary of analog channel definitions for the DynamicDeviceComponent.
 
-        # Run subscriptions after all readbacks have been updated
-        for walk in self.parent.walk_signals():
-            if walk.item.attr_name in updates:
-                new_val, old_val = updates[walk.item.attr_name]
-                walk.item._run_subs(
-                    sub_type=walk.item.SUB_VALUE,
-                    old_value=old_val,
-                    value=new_val,
-                    timestamp=timestamp,
-                )
+    Args:
+        num_channels (int): The number of analog channels to create.
+    """
+    an_channels = {}
+    for i in range(0, num_channels):
+        an_channels[f"ch{i}"] = (
+            GalilRIOAnalogSignalRO,
+            f"ch{i}",
+            {"kind": Kind.normal, "notify_bec": True, "channel": i, "doc": f"Analog channel {i}."},
+        )
+    return an_channels
+
+
+def _create_digital_output_channels(num_channels: int) -> dict[str, tuple]:
+    """
+    Helper method to create a dictionary of digital output channel definitions for the DynamicDeviceComponent.
+
+    Args:
+        num_channels (int): The number of digital output channels to create.
+    """
+    di_out_channels = {}
+    for i in range(0, num_channels):
+        di_out_channels[f"ch{i}"] = (
+            GalilRIODigitalOutSignal,
+            f"ch{i}",
+            {
+                "kind": Kind.config,
+                "notify_bec": True,
+                "channel": i,
+                "doc": f"Digital output channel {i}.",
+            },
+        )
+    return di_out_channels
 
 
 class GalilRIO(PSIDeviceBase):
     """
-    Galil RIO controller integration with 8 analog input channels. To implement the device,
-    please provide the appropriate host and port (default port is 23).
+    Galil RIO controller integration with 16 digital output channels and 8 analog input channels.
+    The default port for the controller is 23.
 
     Args:
         host (str): Hostname or IP address of the Galil RIO controller.
+        port (int, optional): Port number for the TCP/IP connection. Defaults to 23.
+        socket_cls (type[SocketIO], optional): Socket class to use for communication. Defaults to SocketIO.
+        scan_info (ScanInfo, optional): ScanInfo object for the device.
+        device_manager (DeviceManagerDS): The device manager instance that manages this device.
+        **kwargs: Additional keyword arguments passed to the PSIDeviceBase constructor.
     """
 
     SUB_CONNECTION_CHANGE = "connection_change"
 
-    an_ch0 = Cpt(GalilRIOSignalRO, signal_name="an_ch0", channel=0, doc="Analog input channel 0")
-    an_ch1 = Cpt(GalilRIOSignalRO, signal_name="an_ch1", channel=1, doc="Analog input channel 1")
-    an_ch2 = Cpt(GalilRIOSignalRO, signal_name="an_ch2", channel=2, doc="Analog input channel 2")
-    an_ch3 = Cpt(GalilRIOSignalRO, signal_name="an_ch3", channel=3, doc="Analog input channel 3")
-    an_ch4 = Cpt(GalilRIOSignalRO, signal_name="an_ch4", channel=4, doc="Analog input channel 4")
-    an_ch5 = Cpt(GalilRIOSignalRO, signal_name="an_ch5", channel=5, doc="Analog input channel 5")
-    an_ch6 = Cpt(GalilRIOSignalRO, signal_name="an_ch6", channel=6, doc="Analog input channel 6")
-    an_ch7 = Cpt(GalilRIOSignalRO, signal_name="an_ch7", channel=7, doc="Analog input channel 7")
+    #############################
+    ### Analog input channels ###
+    #############################
+
+    analog_in = DDC(_create_analog_channels(GalilRIOAnalogSignalRO._NUM_ANALOG_CHANNELS))
+    digital_out = DDC(
+        _create_digital_output_channels(GalilRIODigitalOutSignal._NUM_DIGITAL_OUTPUT_CHANNELS)
+    )
 
     def __init__(
         self,
@@ -177,19 +251,18 @@ class GalilRIO(PSIDeviceBase):
         if port is None:
             port = 23  # Default port for Galil RIO controller
         self.controller = GalilRIOController(
-            socket_cls=socket_cls, socket_host=host, socket_port=port, device_manager=device_manager
+            name=f"GalilRIOController_{name}",
+            socket_cls=socket_cls,
+            socket_host=host,
+            socket_port=port,
+            device_manager=device_manager,
         )
-        self._last_readback: float = time.monotonic()
+        self._readback_metadata: dict[str, float] = {"last_readback": 0.0}
         super().__init__(name=name, device_manager=device_manager, scan_info=scan_info, **kwargs)
         self.controller.subscribe(
             self._update_connection_state, event_type=self.SUB_CONNECTION_CHANGE
         )
 
-    @property
-    def last_readback(self) -> float:
-        """Return the time of the last readback from the controller."""
-        return self._last_readback
-
     # pylint: disable=arguments-differ
     def wait_for_connection(self, timeout: float = 30.0) -> None:
         """Wait for the RIO controller to be connected within timeout period."""
@@ -207,7 +280,7 @@ class GalilRIO(PSIDeviceBase):
 
 
 if __name__ == "__main__":
-    HOST_NAME = "129.129.98.64"
+    HOST_NAME = "129.129.122.14"
     from bec_server.device_server.tests.utils import DMMock
 
     dm = DMMock()
diff --git a/tests/conftest.py b/tests/conftest.py
deleted file mode 100644
index cfe52ea..0000000
--- a/tests/conftest.py
+++ /dev/null
@@ -1,14 +0,0 @@
-"""
-Conftest runs for all tests in this directory and subdirectories. Thereby, we know for
-certain that the SocketSignal.READBACK_TIMEOUT is set to 0 for all tests, which prevents
-hanging tests when a readback is attempted on a non-connected socket.
-"""
-
-# conftest.py
-import pytest
-from ophyd_devices.utils.socket import SocketSignal
-
-
-@pytest.fixture(autouse=True)
-def patch_socket_timeout(monkeypatch):
-    monkeypatch.setattr(SocketSignal, "READBACK_TIMEOUT", 0.0)
diff --git a/tests/tests_devices/test_fupr_ophyd.py b/tests/tests_devices/test_fupr_ophyd.py
index 2683a14..9e56856 100644
--- a/tests/tests_devices/test_fupr_ophyd.py
+++ b/tests/tests_devices/test_fupr_ophyd.py
@@ -2,6 +2,7 @@ from unittest import mock
 
 import pytest
 from ophyd_devices.tests.utils import SocketMock
+from ophyd_devices.utils.socket import SocketSignal
 
 from csaxs_bec.devices.omny.galil.fupr_ophyd import FuprGalilController, FuprGalilMotor
 
@@ -17,6 +18,11 @@ def fsamroy(dm_with_devices):
         socket_cls=SocketMock,
         device_manager=dm_with_devices,
     )
+    for walk in fsamroy_motor.walk_signals():
+        if isinstance(walk.item, SocketSignal):
+            walk.item._readback_timeout = (
+                0.0  # Set the readback timeout to 0 to avoid waiting during tests
+            )
     fsamroy_motor.controller.on()
     assert isinstance(fsamroy_motor.controller, FuprGalilController)
     yield fsamroy_motor
diff --git a/tests/tests_devices/test_galil.py b/tests/tests_devices/test_galil.py
index 3024640..b47f271 100644
--- a/tests/tests_devices/test_galil.py
+++ b/tests/tests_devices/test_galil.py
@@ -9,7 +9,11 @@ from ophyd_devices.tests.utils import SocketMock
 from csaxs_bec.devices.npoint.npoint import NPointAxis, NPointController
 from csaxs_bec.devices.omny.galil.fgalil_ophyd import FlomniGalilController, FlomniGalilMotor
 from csaxs_bec.devices.omny.galil.fupr_ophyd import FuprGalilController, FuprGalilMotor
-from csaxs_bec.devices.omny.galil.galil_rio import GalilRIO, GalilRIOController, GalilRIOSignalRO
+from csaxs_bec.devices.omny.galil.galil_rio import (
+    GalilRIO,
+    GalilRIOAnalogSignalRO,
+    GalilRIOController,
+)
 from csaxs_bec.devices.omny.galil.lgalil_ophyd import LamniGalilController, LamniGalilMotor
 from csaxs_bec.devices.omny.galil.ogalil_ophyd import OMNYGalilController, OMNYGalilMotor
 from csaxs_bec.devices.omny.galil.sgalil_ophyd import GalilController, SGalilMotor
@@ -272,26 +276,27 @@ def test_galil_rio_signal_read(galil_rio):
     ## Test read of all channels
     ###########
 
-    assert galil_rio.an_ch0._READ_TIMEOUT == 0.1  # Default read timeout of 100ms
+    assert galil_rio.analog_in.ch0._readback_timeout == 0.1  # Default read timeout of 100ms
     # Mock the socket to return specific values
-    galil_rio.controller.sock.buffer_recv = [b" 1.234 2.345 3.456 4.567 5.678 6.789 7.890 8.901"]
-    galil_rio._last_readback = 0  # Force read from controller
-
+    analog_bufffer = b" 1.234 2.345 3.456 4.567 5.678 6.789 7.890 8.901\r\n"
+    galil_rio.controller.sock.buffer_recv = []  # Clear any existing buffer
+    galil_rio.controller.sock.buffer_recv.append(analog_bufffer)
     read_values = galil_rio.read()
     assert len(read_values) == 8  # 8 channels
+
     expected_values = {
-        galil_rio.an_ch0.name: {"value": 1.234},
-        galil_rio.an_ch1.name: {"value": 2.345},
-        galil_rio.an_ch2.name: {"value": 3.456},
-        galil_rio.an_ch3.name: {"value": 4.567},
-        galil_rio.an_ch4.name: {"value": 5.678},
-        galil_rio.an_ch5.name: {"value": 6.789},
-        galil_rio.an_ch6.name: {"value": 7.890},
-        galil_rio.an_ch7.name: {"value": 8.901},
+        galil_rio.analog_in.ch0.name: {"value": 1.234},
+        galil_rio.analog_in.ch1.name: {"value": 2.345},
+        galil_rio.analog_in.ch2.name: {"value": 3.456},
+        galil_rio.analog_in.ch3.name: {"value": 4.567},
+        galil_rio.analog_in.ch4.name: {"value": 5.678},
+        galil_rio.analog_in.ch5.name: {"value": 6.789},
+        galil_rio.analog_in.ch6.name: {"value": 7.890},
+        galil_rio.analog_in.ch7.name: {"value": 8.901},
     }
     # All timestamps should be the same
     assert all(
-        ret["timestamp"] == read_values[galil_rio.an_ch0.name]["timestamp"]
+        ret["timestamp"] == read_values[galil_rio.analog_in.ch0.name]["timestamp"]
         for signal_name, ret in read_values.items()
     )
     # Check values
@@ -301,7 +306,7 @@ def test_galil_rio_signal_read(galil_rio):
 
     # Check communication command to socker
     assert galil_rio.controller.sock.buffer_put == [
-        b"MG@AN[0],@AN[1],@AN[2],@AN[3],@AN[4],@AN[5],@AN[6],@AN[7]\r"
+        b"MG@AN[0], @AN[1], @AN[2], @AN[3], @AN[4], @AN[5], @AN[6], @AN[7]\r"
     ]
 
     ###########
@@ -313,11 +318,11 @@ def test_galil_rio_signal_read(galil_rio):
 
     def value_callback(value, old_value, **kwargs):
         obj = kwargs.get("obj")
-        galil = obj.parent
+        galil = obj.parent.parent
         readback = galil.read()
         value_callback_buffer.append(readback)
 
-    galil_rio.an_ch0.subscribe(value_callback, run=False)
+    galil_rio.analog_in.ch0.subscribe(value_callback, run=False)
     galil_rio.controller.sock.buffer_recv = [b" 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2"]
     expected_values = [2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2]
 
@@ -327,13 +332,15 @@ def test_galil_rio_signal_read(galil_rio):
 
     # Should have used the cached value
     for walk in galil_rio.walk_signals():
-        walk.item._READ_TIMEOUT = 10  # Make sure cached read is used
-    ret = galil_rio.an_ch0.read()
+        walk.item._readback_timeout = 10  # Make sure cached read is used
+    ret = galil_rio.analog_in.ch0.read()
 
     # Should not trigger callback since value did not change
-    assert np.isclose(ret[galil_rio.an_ch0.name]["value"], 1.234)
+    assert np.isclose(ret[galil_rio.analog_in.ch0.name]["value"], 1.234)
     # Same timestamp as for another channel as this is cached read
-    assert np.isclose(ret[galil_rio.an_ch0.name]["timestamp"], galil_rio.an_ch7.timestamp)
+    assert np.isclose(
+        ret[galil_rio.analog_in.ch0.name]["timestamp"], galil_rio.analog_in.ch7.timestamp
+    )
     assert len(value_callback_buffer) == 0
 
     ##################
@@ -341,10 +348,10 @@ def test_galil_rio_signal_read(galil_rio):
     ##################
 
     # Now force a read from the controller
-    galil_rio._last_readback = 0  # Force read from controller
-    ret = galil_rio.an_ch0.read()
+    galil_rio.analog_in.ch0._last_readback = 0  # Force read from controller
+    ret = galil_rio.analog_in.ch0.read()
 
-    assert np.isclose(ret[galil_rio.an_ch0.name]["value"], 2.5)
+    assert np.isclose(ret[galil_rio.analog_in.ch0.name]["value"], 2.5)
 
     # Check callback invocation, but only 1 callback even with galil_rio.read() call in callback
     assert len(value_callback_buffer) == 1
@@ -352,7 +359,45 @@ def test_galil_rio_signal_read(galil_rio):
     assert np.isclose(values, expected_values).all()
     assert all(
         [
-            value["timestamp"] == value_callback_buffer[0][galil_rio.an_ch0.name]["timestamp"]
+            value["timestamp"]
+            == value_callback_buffer[0][galil_rio.analog_in.ch0.name]["timestamp"]
             for value in value_callback_buffer[0].values()
         ]
     )
+
+
+def test_galil_rio_digital_out_signal(galil_rio):
+    """
+    Test that the Galil RIO digital output signal can be set correctly.
+    """
+    ## Test Read from digital output channels
+    buffer_receive = []
+    excepted_put_buffer = []
+    for ii in range(galil_rio.digital_out.ch0._NUM_DIGITAL_OUTPUT_CHANNELS):
+        cmd = f"MG@OUT[{ii}]\r".encode()
+        excepted_put_buffer.append(cmd)
+        recv = " 1.000".encode()
+        buffer_receive.append(recv)
+
+    galil_rio.controller.sock.buffer_recv = buffer_receive  # Mock response for readback
+
+    digital_read = galil_rio.read_configuration()  # Read to populate readback values
+
+    for walk in galil_rio.digital_out.walk_signals():
+        assert np.isclose(digital_read[walk.item.name]["value"], 1.0)
+
+    assert galil_rio.controller.sock.buffer_put == excepted_put_buffer
+
+    # Test writing to digital output channels
+    galil_rio.controller.sock.buffer_put = []  # Clear buffer put
+    galil_rio.controller.sock.buffer_recv = [b":"]  # Mock response for readback
+
+    # Set digital output channel 0 to high
+    galil_rio.digital_out.ch0.put(1)
+    assert galil_rio.controller.sock.buffer_put == [b"SB0\r"]
+
+    # Set digital output channel 0 to low
+    galil_rio.controller.sock.buffer_put = []  # Clear buffer put
+    galil_rio.controller.sock.buffer_recv = [b":"]  # Mock response for readback
+    galil_rio.digital_out.ch0.put(0)
+    assert galil_rio.controller.sock.buffer_put == [b"CB0\r"]