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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