Safety Bus Manual — P/N LS10177-000HI-E:B 02/21/2019 16
Addressing the I/O Modules Introduction
2.7 Addressing the I/O Modules
Up to 64 I/O modules can be connected on each communication ring. Each module must be
addressed with a unique address included between 1 - 64 using the dedicated SB-PRG programmer.
During commissioning, make sure that along the communication ring there are no modules with the
same address. Also check that the programmed modules correspond exactly to those installed in the
field.
It is possible to check correct model installation on the control panel display using the control board
diagnostic cycle.
2.8 Local Power Supplies
The use of local power supplies makes it possible to reduce cabling dedicated to power supply.
Each local power supply must be correctly sized to guarantee power to the modules whether or not
mains voltage is present. For each group of modules powered by a local power supply, an SB-SIM-
GM module must be provided. This module detects local power supply failures and any leakage to
ground of battery voltage and I/O module circuits and signals it to the control panel. For instruc-
tions on sizing the power supplies and batteries, please refer to the paragraphs below.
NOTE: Apply the adhesive label containing the address in the space provided on the front panel
of each module.
NOTE: The H-S81-HS panel, the SB-SIM/GM, SB-SIM, SB-AIM, and SB-NCM can be powered
from a power-limited AUX power circuit on the panel. For the S81-HS/C and remaining modules
on H-S81-HS, do as follows:
- Use only UL 864 Listed, regulated and power limited power supplies suitable for fire alarm
service.
- For each power supply, use an SB-SIM-GM module to carry power supply failures and ground
dispersion back to the panel.
- The power supply must be located in the same room within 20 feet (6.096 meters) of the Safety
Bus enclosure with all cabling in conduit.
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