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Concept

Concept


Products: AS-P Smoke Control, Automation Server Smoke Control, IP-IO Smoke Control, MP-C Smoke Control, MP-V Smoke Control
Functionalities: Smoke Control
Product version: 2022
1/9/2025

Interconnection Integrity and Pathway Class

The interconnection pathways provided for communications between the smoke control system components, such as Smoke Control Servers (AS-P-AS), field controllers (IP, MS/TP and Infinet), Central IO modules and the IP alarm panel, are supervised with communications integrity monitoring. Also, the end-to-end critical control functions are supervised via end-device monitoring and feedback.

Class B

The Ethernet IP network, MS/TP and i2 communications pathways operate as Class B pathways. A Class B pathway is specified to operate as follows:

a) A redundant path is not included.

b) Operational capability stops at a single open.

c) Conditions that affect the intended operation of the path are annunciated as a trouble signal.

d) Operational capability is maintained during the application of a single ground fault.

e) A single ground condition shall result in the annunciation of a trouble signal.

f) Where operational capability must be maintained during a fault, the operational capability shall be restored within 200s of the application of the fault.

Note that criteria d and e are not required in smoke control applications because of exception #2 in section 50.3 of the 10th edition of the UL 864 standard.

Class C

The control of smoke control equipment (such as fans and dampers etc.) presented on the FSCS is supervised through process feedback sensors or contacts and operates as Class C pathways. A Class C pathway is specified to operate as follows:

a) One or more pathways are included.

b) Operational capability is verified via end-to-end communication.

c) Monitoring the integrity of individual paths is not required.

d) A loss of end-to-end communication shall result in the annunciation of a trouble signal.

Note that the signal returned from these sensors to the controller provides the end-to-end (criteria b) and a failure anywhere in the equipment activation process is reported as a trouble signal on the FSCS (criteria d).

  • Basic Application Functions
  • General Communications Conventions
  • FSCS Communication Status
  • Equipment Fault Detection
  • Weekly Self-Test