4/8/2013
Voltage Monitor – Instruction Manual
Model 520603-2V150
P/N 520603-
2V150
REV. B 9/11
© 2011 RAILWAY EQUIPMENT CO.
2
2.0
OPERATION
The model 520603-2V150 voltage monitor is equipped to monitor up to two DC voltage
sources. The unit is powered by the voltage source that it monitors on channel one. The
channel one voltage range is 10 to 48 VDC. Because the unit is powered by the voltage it
monitors on channel one, the display will not illuminate until a voltage source is applied across
pins one (+) and two (-). The unit power usage is a constant 2.5 Watts. The unit is reverse
polarity protected, and the input power is protected by an internal resettable fuse.
Channel two has a voltage range of 1 to 150 VDC, but is only available for use if channel one is
powered. There is 2,500 volts isolation between channels.
The monitor has easy front panel access for set up and wiring. There are form C relay outputs
that are over current protected with replaceable blade type automotive fuses.
To get started, power from the source to be monitored (10 to 48 VDC range) should be applied
across WAGO pins 1(+) and 2(-) using 18 to 14 gauge wire. This provides power to channel
one.
The display idle screen will show voltage. If the applied voltage is between the high and low
voltage parameters, the Channel 1 OK LED will be on, and the channel one relay will be
powered.
2.1
Front Panel Features and Components
This section describes the features and components that are on the front panel of the
voltage monitor (see Figure 1).
