Hochiki CHQ-DZM(SCI)-IS - Manual

Hochiki Europe (UK) Limited 2-3-0-1366/ISS3/DEC11
HOCHIKI INTRINSICALLY SAFE COMPATIBLE DUAL ZONE
MONITOR INSTALLATION INSTRUCTIONS
Products covered: CHQ-DZM(SCI)-IS, CHQ-DZM/DIN(SCI)-IS
Function
The CHQ-DZM(SCI)-IS is an input monitoring device which connects to the Hochiki ESP analogue system. It is capable
of monitoring two zones of intrinsically safe detectors through an intrinsically safe barrier. The unit also provides two
controllable outputs, which can be used to drive remote LEDs (if supported by the Control Panel). The unit is available as
either a “Smart-Fix” module box or as a DIN Rail mountable unit with both variants featuring an integral short-circuit
isolator.
Specification
Order codes CHQ-DZM(SCI)-IS and CHQ-DZM/DIN(SCI)-IS*
Transmission method Digital communication using ESP
Loop
Operating voltage 17 – 41 VDC
Quiescent current 330 µA
Current consumption whilst polling 22 mA ± 20 %
Isolator leakage current (switch open) 8 mA (max)
Isolator switch current (switch closed) 1 A (max)
External
supply Operating voltage 20-28.8 VDC (24 VDC nominal)
Current consumption when in fire 70 mA (Both zones in fire)
Output rating 24 VDC 8.5 mA
Zone loading (max) Up to 20 SLR-E-IS or DCD-1E-IS detectors (or a mixture of
both), Up to 20 CCP-E-IS manual call points
E.O.L device (see note below) 10 k
 resistor
Zone resistance 50
 (Max)
Zone capacitance 0.3 µF (Max)
Colour and enclosure material
CHQ Module & CHQ-BACKBOX White ABS
DIN Module Green ABS
* Fire alarm control panel compatibility required for these products. See AP0127 for short-circuit isolator specifications.
NOTE: The EOL resistors supplied with the CHQ-DZM(SCI)-IS comply with Hochiki’s BASEEFA certification for
conventional I.S. detectors. The user must check that any EOL resistors used comply with the certification requirements
for the proposed installation.
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 Fig 2
"Smart-Fix" CHQ Module (Back Plate inc PCB Component)
(Note: configuration of Wiring Terminal blocks differs between
models)
CHQ-LID Transparent Module Lid
(Supplied with four screws and acrylic retaining washers)