Background Image
Table of Contents Table of Contents
Previous Page  62 / 182 Next Page
Information
Show Menu
Previous Page 62 / 182 Next Page
Page Background

ROC800-Series Instruction Manual

3-10

Power Connections

Revised Jul-14

Removing the

Auxiliary Output Fuse

To remove the auxiliary output fuse:

1.

Perform the procedure described in

Section 3.3, Removing a Power

Input Module.

2.

Remove the fuse located at F1 on the Power Input module.

Installing the Auxiliary

Output Fuse

To re-install the auxiliary output fuse:

1.

Replace the fuse located at F1 on the Power Input module.

2.

Perform the procedure described in

Section 3.4, Installing a Power

Input Module

.

3.1.5 Switched Auxiliary Output (AUXSW+ and AUXSW–)

PM-12

The AUX

SW

+ and AUX

SW

–terminals on the 12 volt dc Power Input

module (PM-12) provide switched power for external devices, such as

radios. AUX

SW

+ is current-limited for protection of the power input

and the external device via a 0.5 Amp nominal Positive Temperature

Coefficient (PTC). The AUX

SW

+ and AUX

SW

– terminals provide

voltages from 0 to 14.25 Volts dc. AUX

SW

+ turns off when the

voltage at the BAT terminals falls to a software-configurable voltage

(LoLo Alarm). All module terminal blocks accept 12 to 22 AWG

wiring. Refer to

Figure 3-1

.

If the source voltage falls to a level below which reliable operation

cannot be ensured, the hardware circuitry on the PM-12 module

automatically disables the AUX

SW

+ outputs. This activity is based on

the LoLo Alarm limit (which defaults to 10.6 Volts dc) set for the

System Battery Analog Input Point Number 1. The low input voltage

detect circuit includes approximately 0.75 Volts dc of hysteresis

between turn-off and turn-on levels.

PM-30

The AUX

SW

+ and AUX

SW

–terminals on the PM-30 (11-30 Volts dc)

Power Input module provides switched power for external devices,

such as radios. AUX

SW

+ is current-limited for protection of the power

input and the external device via a .800 mA +/- 10% Positive

Temperature Coefficient (PTC). The AUX

SW

+ and AUX

SW

terminals on the PM-30 module provide voltages from 10.3 to 29.3

Volts dc which follow the input voltage. AUX

SW

+ turns off when the

voltage at the BAT terminals falls to a software-configurable voltage

(LoLo Alarm). All module terminal blocks accept 12 to 22 AWG

wiring. Refer to

Figure 3-3.

If the source voltage falls to a level below which reliable operation

cannot be ensured, the hardware circuitry on the Power Input module

automatically disables the AUX

SW

+ outputs. This activity is based on

the LoLo Alarm limit (which defaults to 10.1 Volts dc) set for the

System Battery Analog Input Point Number 1. The low input voltage