Emerson ROC827 instruction manual Volt dc Power Input Module

ROC827 Instruction Manual

the ROC800-Series modules via the backplane. The ROC827 requires 11.25 to 14.25 Volts dc for proper operation.

BAT+ / BAT–

CHG+ / CHG–

AUX+ / AUX–

AUXSW+ / AUXSW–

VOK LED

VOFF LED

VOVER LED

TEMP LED

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 AUXSW+ / AUXSW– terminals to provide switched power for external devices. The AUXSW+ 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.

Issued Mar-06 Power Connections 3-2