
INSTALLATION
2-7
Document No.: SIG-00-11-10 Version: A.1
2.1.5
Threshold Settings
The current sensor module has adjustable threshold settings for each input. The
settings are adjusted via DIP switches located on the front of the unit. The DIP
switch settings are shown in Figure 2-9.
WARNING
IT IS THE RAILROAD'S OR AGENCY'S RESPONSIBILITY
THAT THE INSTALLATION IS FULLY OPERATIONALLY
TESTED TO ENSURE SAFETY. SYSTEM OPERATION MUST
BE VERIFIED PRIOR TO PLACING SYSTEM IN SERVICE
.
WARNING
UNDER LIMITED CONDITIONS, LOW VOLTAGE FOREIGN
ENERGY MAY TRIGGER A CURRENT SENSOR. WHEN THIS
OCCURS, THE CURRENT SENSOR INDICATES THAT THE
LAMP IS LIT EVEN THOUGH IT IS NOT. THIS HAZARD
OCCURS MOST OFTEN WHEN USING INCANDESCENT
LAMPS.
TO AVOID THIS HAZARD, USE VOLTAGE SENSING
COMBINED WITH CURRENT SENSING TO DETECT THE
LAMP STATE.
NOTE
±1.03 Amps is the recommended setting for
standard lamps and is the factory default
setting. The ±0.65 Amps setting is reserved
for future use.
NOTE
Ensure the threshold setting is set for ALL
outputs.