Installation

ANN-BUS Devices

2.7 ANN-BUS Devices

WARNING! Disconnect all sources of power (AC and DC) before installing or removing any modules or wiring.

A variety of optional devices can be connected to the FACP ANN-BUS communication circuit. Compatible devices include:

•ANN-80 LCD Annunciator

•ANN-S/PG Serial/Parallel Printer Interface Module

•ANN-I/O LED Driver Module

•ANN-LED Annunciator Module (annunciates alarms, troubles and supervisories)

•ANN-RLED Annunciator Module (annunciates alarms only)

•ANN-RLY Relay Module

2.7.1 ANN-BUS Wiring

This section contains information on calculating ANN-BUS wire distances and the types of wiring configurations (Class B).

2.7.1.1 Calculating Wiring Distance for ANN-BUS Modules

The following instructions will guide the installer in determining the type of wire and the maximum wiring distance that can be used with FACP ANN-BUS accessory modules.

To calculate the wire gauge that must be used to connect ANN-BUS modules to the FACP, it is necessary to calculate the total worst case current draw for all modules on a single 4-conductor bus. The total worst case current draw is calculated by adding the individual worst case currents for each module. The individual worst case values are shown in the following table:

Model Number

Worst Case Current Draw

 

 

ANN-80 LCD Annunciator

0.040 amps

 

 

ANN-S/PG Serial/Parallel Printer Interface Module

0.040 amps

 

 

ANN-I/O LED Driver Module

0.200 amps

 

 

ANN-(R)LED Annunciator Module

0.068 amps

 

 

ANN-RLY Relay Module

0.075 amps

 

 

Note: Total worst case current draw on a single ANN-BUS cannot exceed 0.5 amp.

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MRP-2001 & MRP-2001E PN 53040:A 4/16/2007