PLANT CONTROL MODULE
INSTALLATION INSTRUCTIONS
Products covered: CHQ-PCM(SCI), CHQ-PCM/DIN(SCI)
The CHQ-PCM(SCI) is a loop powered output module with four independent change-over relay outputs, with N/O and N/C
volt free contacts. These outputs can be driven separately under the control of the fire alarm panel and can be used for
the control of devices such as dampers or for plant and equipment shutdown. 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.
Components
Standard "Smart-Fix" Modules are supplied as two individual components (see Fig 1 & 2). DIN versions are supplied as
one unit (see Fig 3).
Fig 1
"Smart-Fix" CHQ Module (Back Plate inc PCB Component)
(Note: configuration of Wiring Terminal blocks differs between
models)
Setting the Loop Address
The analogue address of the Module is set using the first 7
switches of the 8-bit DIL switch, which in the case of the
Standard CHQ is located through the cut-out section on the
top of the PCB cover. On the DIN version, this switch is
located on the edge of the PCB behind the clear door (see
Fig 3).
The switches are numbered 1 to 8 (left to right):
CHQ
MODULE
DIN
MODULE
The switches should be set using a small-tipped
screwdriver or similar.
Refer to the Address Chart (Fig 5) on page 3 for a quick
reference on addresses.
Switch 8 is not used and must be switched to “OFF”.
SWITCH UP ON
SWITCH DOWN OFF
SWITCH UP OFF
SWITCH DOWN ON
Fig 2
CHQ-LID Transparent Module Lid
(Supplied with four screws and acrylic retaining washers)
Fig 3
DIN Rail Mountable CHQ Module
2-3-0-1156/ISS2/OCT11
Connection Details
The module has been designed for easy installation
and contains two connector blocks for termination of
the field wiring; refer to Fig. 4 (right) for correct
connection details.
A – EOL Monitoring Resistor, 10 KΩ
B – Operational Resistor, 470 Ω
(volt-free contact)
Setting the Fault Monitoring
The general purpose inputs on the
CHQ-PCM(SCI) are fully monitored for open and
short circuit, however, if the monitoring facility is not
required then they can be disabled by the two-way
DIL switch, refer to the table below:
CHQ MODULE
DIN MODULE
SWITCH 1 DOWN INPUTS 1 & 2 MONITORED
SWITCH 1 UP INPUTS 1 & 2 NOT MONITORED
SWITCH 2 DOWN INPUTS 3 & 4 MONITORED
SWITCH 2 UP INPUTS 3 & 4 NOT MONITORED
SWITCH 1 DOWN INPUTS 1 & 2 NOT MONITORED
SWITCH 1 UP INPUTS 1 & 2 MONITORED
SWITCH 2 DOWN INPUTS 3 & 4 NOT MONITORED
SWITCH 2 UP INPUTS 3 & 4 MONITORED
Fig 4
In Non-Monitored mode*,
the unit ignores open or
short-circuit condition –
but still requires 470 Ω to
activate.
2-3-0-1156/ISS2/OCT11
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