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ROC827 Instruction Manual
Issued Mar-06 Power Connections 3-2
the ROC800-Series modules via the backplane. The ROC827 requires
11.25 to 14.25 Volts dc for proper operation.
Figure 3-1. 12 Volt dc Power Input Module
The CHG+ and CHG– terminals comprise an Analog Input channel that
allows you to monitor an external voltage between 0 to 18 volts dc. For
example, you can connect a solar panel upstream of the solar regulator to
monitor the output of the solar panel. This allows you to compare the
System AI Point Number 2 for the charging voltage (CHG+) to the actual
battery voltage (BAT+) System AI Point Number 1 and take action as
required. The ROC827 has a low-voltage cut-off circuit built-in to guard
against draining power supply batteries. Refer to “Automatic Self Tests”
in Chapter 1, General Information.
Use the AUX+ / AUX– terminals to supply reverse polarity protected
source voltage to external devices, such as a radio or solenoid. Use the
AUX
SW
+ / AUX
SW
– terminals to provide switched power for external
devices. The AUX
SW
+ is turned off when the ROC827 detects a software
configurable voltage at the BAT+ / BAT– terminals.
Table 3-1 details the specific connection information for the 12 volt dc
(PM-12) Power Input module. Table 3-2 indicates the LED fault
indicators.
V
OK
LED
V
OFF
LED
V
OVER
LED
TEMP LED
BAT+ / BAT–
CHG+ / CHG
–
AUX+ / AUX
–
AUX
SW
+ / AUX
SW
–