System Architecture; Monitoring For Integrity - Honeywell H-S81-HS Manual

System Architecture

Message
Dispersion failure
PSU1 failure
PSU2 failure
Stand-alone
25V failure
Temperature failure
Internal failure
Firmware not compatible
Module not compatible
Module removed
Multiple address
Log on fault
Communication ring failure
2.2 System Architecture
The system consists of one or two control boards and a varying number (1 to 64) of I/O modules.
The modules are connected to each other by a ring-type connection that is able to support a single
failure (short or open circuit).

2.3 Monitoring for Integrity

The devices are completely monitored by the control boards to detect any module or ring failures.
The I/O modules send the information regarding the status of the channels to the control boards.
The messages sent by the modules have high priority to guarantee immediate signaling of an alarm.
Both the control boards and the modules are equipped with two independent communication links:
link 1 is connected to the downstream module; link 2 is connected to the upstream module. Both
links are galvanically insulated from the power supply voltage, making it possible to power the
modules using local power supplies.
Safety Bus Manual — P/N LS10177-000HI-E:B 02/21/2019
Condition
Local power supply leakage to ground detected by an SB-SIM-GM module
Local power supply primary voltage failure
Local power supply secondary voltage failure
SB-ECM module reconnected on the ring after performing a back-up
Module power supply voltage out of range
Module internal temperature out of range
Module internal failure
Firmware version not compatible with the control board
Module not compatible (Brand)
Module removed from ring, faulty or not powered
One or more modules along the ring have the same address
Discrepancy between the modules programmed in the panel and those detected
by the control board
Communication ring segment failure (open or short circuit)
Table 2.2 Module Failure Message
Figure 2.2 System Architecture with Mono Configuration
Introduction
12