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ROC827 Instruction Manual
Issued Mar-06 Power Connections 3-5
For the 24 volt 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).
If you need to cycle power to the radio or other device to reduce the load
on the power source (a recommended practice when using batteries), use
a Discrete Output (DO) module to switch power on and off. Refer to the
ROCLINK 800 Configuration Software User Manual (Form A6121).
AUXsw AUX
–
+ – +
2 Amp or less
Fast ActingFuse
–
Other Equipment
2.5 Amps Maximum
Current On. Non-switched
809AUX.DSF
Power Supply
Terminal Block
–
Other Equipment
14.5 Volts DC Maximum @ 0.5 Amps
Switched Powe
r
Figure 3-3. 12 Volt dc Auxiliary Power Wiring
AUX
– +
0.5 Amp or less
Fast Acting Fuse
Other Equipment
12 Volts DC Maximum @ 0.5 Amps
Current-Limited Always On
809AUX24.DSF
Power Supply
Terminal Block
–
Figure 3-4. 24 Volt dc Auxiliary Power Wiring
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.”