INSTALLATION INSTRUCTIONS
MODEL CSM1-77
MRC44 Current Sense Module
(110/220VAC Edition)
IEC power cord
from component
IEC power cord
to AC power source
Tip=+12v Input
Ring=9v DC (15mA) Output
Sleeve=GND
Insulators
3.5mm Mini Plug
(3-Conductor)
To AC
Source
From
Component
Figure 1 – CSM1-77
MRC44 Current Sense Module
Figure 2 – CSM1 Connections
Sense Input Connections (MRC44 Controller)
The sense input connection will typically be used to sense the power state of a source component
using the Xantech CSM1-77 Current Sense Module. Plug the 3.5mm miniplug from the CSM1-77
into the appropriate sense jack on the MRC44. The CSM1 plugs into a 110/220V AC power
source via a Female IEC adaptor. The component power cord plugs into the CSM1 via a male
IEC adaptor (see Figures 1 & 2).
CSM1-77 Threshold Adjustments
a. First, make sure the 3.5mm mini-plug is plugged into the appropriate sense jack on the
MRC44 and that the MRC44 is powered ON. (The CSM1 gets low-voltage DC power from
the MRC44 – not from the AC line. See Figure 2-Top for mini-jack pin out )
b. Select the correct position of the RANGE slider switch – the HI position is for devices with a
high current draw when ON, the LO position is for devices with a low current draw when ON
(based upon the lowest current draw state of the component when ON).
c. Manually turn the component ON.
d. Using a small (1/8” wide) blade screwdriver, rotate the current control to the full CLOCKWISE
position (LO CURRENT).
e. Rotate the control COUNTER-CLOCKWISE (towards the HI CURRENT position) until the
Threshold Adjustment LED goes OFF.
f. Turn the component OFF (standby mode).
g. Rotate the control CLOCKWISE until the Threshold Adjustment just goes ON.
h. Set the control to a point midway between these two settings. This should be the correct
setting.
NOTE 1:
If you have trouble with the threshold adjustment correctly detecting the ON and OFF
states of the component, try changing the RANGE slider to the opposite position and then try the
adjustment again.
NOTE 2:
If the Threshold Adjustment LED does not go ON and OFF with the component power,
make minor adjustments to the threshold adjust until the LED is in proper sync.
NOTE 3:
Program IR commands for the MRC44 Controller current sensing as described in the
MRC44 Installation Instructions, “PROGRAMMING SENSE CODES”.
XANTECH CORPORATION
12950 Bradley Avenue, Sylmar CA 91342-3829
phone 818.362.0353 • fax 818.362.9506
www.xantech.com
Part No. 08901170 Rev A 10-08-2002
