diff --git a/site_ansto/instrument/bilby/config/hmm/detector.tcl b/site_ansto/instrument/bilby/config/hmm/detector.tcl
new file mode 100644
index 00000000..9e286089
--- /dev/null
+++ b/site_ansto/instrument/bilby/config/hmm/detector.tcl
@@ -0,0 +1,31 @@
+# Detector voltage Controller
+
+set sim_mode [SplitReply [detector_simulation]]
+
+if {$::sim_mode == "true"} {
+  EvFactory new dhv1 sim
+} else {
+# clientput "Detector Voltage control not yet available"
+# MJL 6/13 Bilby detector initial (may replace with embedded box control in 2015).
+# Bilby GE/RS detector two supplies ~+1510V (Curtain and Rear detector, 4 panels + 2 panels respectively).
+# 'down' voltage for moves = 50V (as requested by GE/RS).  May increase later
+# 'max' voltage settable = 1800V (guesstimate, to avoid tube damage)
+# Ramp rate set to 50V/us -> about 30 sec total
+# TODO replace IP address with ca2-bilby (when configured in DNS)
+makeasyncqueue acq NHQ200 137.157.203.41 4001
+evfactory new dhv1 nhq200 acq 1
+dhv1 tolerance 5
+dhv1 rate 50
+dhv1 lower 50
+dhv1 upper 1510
+dhv1 max 1800
+#dhv1 lock
+evfactory new dhv2 nhq200 acq 2
+dhv2 tolerance 5
+dhv2 rate 50
+dhv2 lower 50
+dhv2 upper 1510
+dhv2 max 1800
+#dhv2 lock
+}
+