Hochiki CHQ-DZM -IS User Manual

HOCHIKI INTRINSICALLY SAFE COMPATIBLE DUAL ZONE

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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 pro vides 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

Operating voltage 17 – 41 VDC
Quiescent current 330 µA

Loop

External
supply

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

E.O.L device (see note below)
Zone resistance
Zone capacitance 0.3 µF (Max)

Colour and enclosure material

* 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.

Current consumption whilst polling 22 mA ± 20 %
Isolator leakage current (switch open) 8 mA (max)
Isolator switch current (switch closed) 1 A (max)
Operating voltage 20-28.8 VDC (24 VDC nominal)
Current consumption when in fire 70 mA (Both zones in fire)

both), Up to 20 CCP-E-IS manual call points
10 k

resistor

50

(Max)

CHQ Module & CHQ-BACKBOX White ABS
DIN Module Green ABS

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)

CHQ-LID Transparent Module Lid

(Supplied with four screws and acrylic retaining washers)

Fig 2

Hochiki Europe (UK) Limited 2-3-0-1366/ISS3/DEC11

Setting the Loop Address

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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).

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The switches are numbered 1 to 8 (left to right):

CHQ
MODULE

DIN
MODULE

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The switches should be set using a small-tipped screwdriver

SWITCH UP ON
SWITCH DOWN OFF
SWITCH UP OFF
SWITCH DOWN ON

or similar.

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Refer to the Address Chart (Fig 5) on page 3 for a quick
reference on addresses.

Fig 3

DIN Rail Mountable CHQ Module

Connection Details

The CHQ-DZM(SCI)-IS should be connected to the loop as shown below, the module does not support any line contin uity
options, therefore, if manual Call Points are to be interfaced to the unit then these should be connected first. Detectors
should be connected to the CHQ-DZM(SCI)-IS in accordance with Hochiki’s I.S. certification.

NOTE: The CHQ-DZM(SCI)-IS must be installed in the safe area along with the barrier.

Compatible Barrier
Types

The CHQ-DZM(SCI)-IS
and CHQ-DZM/DIN(SCI)­IS are capable of
supporting the barrier
types listed below.

Galvanic Isolators

MTL5561
KFD0-CS-Ex1.51P
KFD0-CS-Ex2.51P
MTL5061 & MTL4061

Fig 4

(older types)

Zener Barriers

MTL7728+
MTL7787+
MTL728+ (older type)

Setting EOL Monitoring Option

Select the required EOL monitoring option using the 2-bit DIL switch.

SWITCH 1 DOWN

CHQ MODULE

I.S. MODE*

SWITCH 2 UP
SWITCH 1 UP

DIN MODULE

I.S. MODE*

SWITCH 2 DOWN

* Fire alarm control panel compatibility required for these products.

Hochiki Europe (UK) Limited 2-3-0-1366/ISS3/DEC11