Rockwell Automation 2100 CENTERLINE Smoke Detector Unit - Manual (Page 5)

Publication 2100-IN046B-EN-P—November 2001
CENTERLINE Motor Control Centers Bulletin 2100 Smoke Detector Unit 5
DC Voltage Adjustment The DC voltage has been preset at the factory and should not require
adjustment. If the supply voltage is too high or too low, then the
power supply output can be adjusted.
To check the DC voltage, an external voltmeter with a minimum range
of 0-50 Vdc is necessary. Connect the voltmeter between terminal
block point 6 (positive) and terminal block point 8 (negative). If the
unit has the optional DC voltmeter instead of the “DC POWER ON”
pilot light, use this meter for monitoring the voltage. The meter should
read in the range of 22-26 volts. If the voltage is out of that range,
adjust the DC output of the power supply by turning the “voltage
adjustment” potentiometer, as shown in Figure 3.
If the voltage cannot be adjusted to within the 22-26 volt range, a
possible overvoltage or undervoltage situation may exist. Be certain
that the AC voltage is within the range of 105-125 volts.
Figure 2 DC voltage adjustment
Voltage adjustment