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ROC800-Series Instruction Manual

3-8

Power Connections

Revised Jul-14

3.1.4 Auxiliary Output (AUX+ and AUX–)

You can use the AUX+ and AUX–terminals to supply reverse polarity

protected source voltage to external devices, such as a radio or a

solenoid. All module terminal blocks accept 12 to 22 AWG wiring.

Refer to

Figures 3-3

and

3-4

.

PM-12

For the 12-volt dc Power Input module (PM-12), the auxiliary output

follows the voltage located at BAT+ minus ~0.7 Volts dc, which is the

protection diode voltage drop. For example, if the BAT+ voltage is 13

volts dc, then AUX+ is ~12.3 Volts dc.

For the 12-volt dc Power Input module, AUX+ / AUX– is always on

and is current-limited by a fast-acting glass 2.5 Amp x 20 mm fuse. In

the event that the fuse blows, CSA requires that you replace the 2.5

Amp fast-acting fuse with a Little Fuse 217.025 or equivalent. Refer to

Automatic Self Tests

in

Chapter 1, General Information

.

Figure 3-7. Auxiliary Power Wiring for PM-12 Module

PM-24

For the 24 volt dc Power Input module (PM-24), the AUX voltage is

always 12 Volts dc minus ~0.7 Volts. AUX+ / AUX– is internally

current-limited by a 0.5 Amp Positive Temperature Coefficient (PTC).