ROC827 Instruction Manual

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).

Power Supply

Other Equipment

Terminal Block

AUXsw

 

AUX

2.5 Amps Maximum

 

Current On. Non-switched

+

+

 

 

 

 

 

 

 

 

 

2 Amp or less

 

 

 

 

 

Fast ActingFuse

 

 

 

 

 

 

Other Equipment

 

 

 

 

14.5 Volts DC Maximum @ 0.5 Amps

 

 

 

 

 

Switched Power

809AUX.DSF

Figure 3-3. 12 Volt dc Auxiliary Power Wiring

Power Supply

Other Equipment

Terminal Block

12 Volts DC Maximum @ 0.5 Amps

AUX

 

 

Current-Limited Always On

+

 

 

 

 

0.5 Amp or less

 

 

Fast Acting Fuse

 

 

809AUX24.DSF

Figure 3-4. 24 Volt dc Auxiliary Power Wiring

Removing the To remove the auxiliary output fuse:

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 To re-install the auxiliary output fuse:

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.”

Issued Mar-06

Power Connections

3-5

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Emerson ROC827 instruction manual Volt dc Auxiliary Power Wiring, Other Equipment