FireClass DUO-CEL - DUO-CEL Input and Output Specification

EQUIPMENT: FIRECLASS DUO-CEL
PUBLICATION: OM_DUO-CEL_APP
ISSUE No. & DATE: 2 20/06/18
PAGE 36 of 46
14. DUO-CEL Input and Output Specification
Detection Zone Inputs
Operating Details
Active open circuit & Head Removal monitoring, with optional
conventional open circuit fault monitoring.
Conventional short circuit fault monitoring.
Conventional Fire Alarm monitoring with optional Detector/MCP
discrimination.
Monitoring Threshold current
Short circuit threshold:
≥ 37.8mA. (≤ 60R)
Evacuate Manual Call Point alarm threshold:
≥ 22.8mA, <37.8mA. (≥ 60R, ≤ 410R)
Detector/Alert Manual Call Point alarm threshold:
≥ 11.7mA, <22.8mA. (≥ 410R, ≤ 1k2)
Quiescent:
≥ 2.2mA, <11.7mA. (≥ 1k2, ≤ 8k4)
Open circuit (resistor EOL or Twin-Wire):
< 2.2mA. (≥ 8k4)
Cable requirements
Maximum cable resistance of circuit loop: 7.5 Ohms.
Ancillary Inputs
Remote Control Input
Class Change: 4k7
Alert: 2k2
Evacuate: 1k
Silence Alarms: 470R
Reset: 220R
End-Of-Line: 10k
All resistors are ¼W 5% tolerance
Maximum cable resistance of circuit loop 20 Ohms
Earth Fault I/P
Fault threshold varies for each circuit, from 10k to 70k between
Earth and +ve or -ve line