diff --git a/site_ansto/instrument/hipd/config/plc/plc.tcl b/site_ansto/instrument/hipd/config/plc/plc.tcl
index bd3ca42b..8ce177f6 100644
--- a/site_ansto/instrument/hipd/config/plc/plc.tcl
+++ b/site_ansto/instrument/hipd/config/plc/plc.tcl
@@ -1,6 +1,6 @@
 set sim_mode [SplitReply [plc_simulation]]
 if {$sim_mode == "false"} { 
-  MakeAsyncQueue plc_chan SafetyPLC 137.157.204.65 30001
+  MakeAsyncQueue plc_chan SafetyPLC 137.157.211.21 30001
   MakeSafetyPLC plc plc_chan 0
 }
 
diff --git a/site_ansto/instrument/rsd/config/plc/plc.tcl b/site_ansto/instrument/rsd/config/plc/plc.tcl
index af1d0210..3e8b4ad3 100644
--- a/site_ansto/instrument/rsd/config/plc/plc.tcl
+++ b/site_ansto/instrument/rsd/config/plc/plc.tcl
@@ -1,6 +1,6 @@
 set sim_mode [SplitReply [plc_simulation]]
 if {$sim_mode == "false"} { 
-  MakeAsyncQueue plc_chan SafetyPLC 137.157.204.65 31001
+  MakeAsyncQueue plc_chan SafetyPLC 137.157.211.21 31001
   MakeSafetyPLC plc plc_chan 0
 }