HFP Plant Control Module with SCI

The CHQ-PCM(HFP)-SCI is a loop powered input/ output module with four independent change-over relay outputs and four monitored inputs. The outputs feature N/O and N/C volt free contacts and can be driven separately under the control of the fire alarm panel, to be used for the control of devices such as dampers or for plant and equipment shutdown. The four inputs are provided for local fire and fault monitoring and these are fully monitored for

open and short circuit, which if required, can be enabled or disabled in pairs using a two-way DIL switch.

Note: The state of the relay contacts will be indeterminate until the unit is powered. A back box is also available (CHQ-BACKBOX) which, when used in conjunction with the CHQ-PCM(HFP)-SCI, increases the IP rating to IP65. When using heavy cables we recommend the use of the SMB-1 Module Enclosure in conjunction with the SMB-ADAPTOR plate. The unit is also available in a DIN Rail mountable enclosure – CHQ-PCM/DIN(SCI).

Features and benefits:

• Loop powered with single loop address.
• Provides four change-over relay outputs, four independent inputs for monitoring of volt free contacts.
• Each input can be configured to monitor either Normally Open or Normally Closed contacts.
• Also available as DIN.
• Both models feature an integral SCI.
• Deeper, glanded IP65 backbox available.
• Can be used with CHQ-BACKBOX to comply with BS 7671.
• Approved by LPCB.
• SIL2 and Railway Approved variants available.
• Quiescent current (typical) 330 μA.
• Current consumption (whilst polling) 22 mA ± 20 %.
• Relay contact rating 30 V d.c., maximum, 1 A (resistive load).
• Input EOL resistor 10 K Ω, ±5%, 0.25 W.
• Input threshold level ON=470 Ω, Short cct <50 Ω, Open cct >100 KΩ.
• Maximum rated current 1 A (switch closed).
• Leakage current 3 mA (switch open).