6: New Ann-Bus Annunciators/Devices; Ann-Bus Wiring - Fire-Lite Alarms MS-9600LS Manual

Accessories
1.8.6 New ANN-BUS Annunciators/Devices
NOTE: Refer to "Canadian Application" on page 200 for specific Canadian requirements.
WARNING: RISK OF ELECTRICAL SHOCK AND EQUIPMENT DAMAGE
!
DISCONNECT ALL SOURCES OF POWER (AC AND DC) BEFORE INSTALLING OR REMOVING
ANY MODULES OR WIRING.
The legacy ACS annunciators may not be used if new ANN-BUS annunciators are being used due
to incompatible serial communication protocols.
A variety of optional devices can be connected to the FACP EIA-485 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 (alarm, trouble, supervisory LEDs)
• ANN-RLED Annunciator Module (red alarm LEDs only)
• ANN-RLY Relay Module

ANN-BUS Wiring

This section contains information on calculating ANN-BUS wire distances and the types of wiring
configurations (Class B).
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 nec-
essary 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:
ANN-80 LCD Annunciator
ANN-S/PG Serial/Parallel Printer Interface Module
ANN-I/O LED Driver Module
ANN-(R)LED Annunciator Module
ANN-RLY Relay Module
After calculating the total worst case current draw, Table 1.1 specifies the maximum distance the
modules can be located from the FACP on a single wire run. The table ensures 6.0 volts of line
drop maximum. In general, the wire length is limited by resistance, but for heavier wire gauges,
MS-9600LS Series Manual — P/N 52646:B2 2/12/2010
Model Number
1 Total worst case current draw on a single ANN-BUS cannot exceed 0.5 amp. If
current draw exceeds 0.5 amps, refer to "Powering ANN-BUS Devices from
Auxiliary Power Supply" on page 26.
Product Description
Worst Case Current Draw
0.040 amps
0.040 amps
0.200 amps
0.068 amps
0.075 amps
1
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