25CF3000 INSTALLATION AND OPERATION MANUAL 25-14682-A July 2019 www.eaton.com
Compatible Equipment
Zone monitor units
CZMU352
CZMU352 is designed to enable a zone of compatible conventional detectors and
callpoints to be connected into the addressable loop, it is compatible with up to 20
Eaton conventional detectors connected via CDBB300 bases.
Please refer to local standards e.g.BS5839 Pt1:2017 for details of the maximum
allowable area to be covered by a single spur / zone. CZMU352 fixes to a standard,
deep, double gang back box and can be either surface or semi recess mounted.
When semi recessed only the front section protrudes giving a
maximum 29mm depth.
CZMU352-IS
CZMU352-IS Similar to the above but the detection zone has been programmed to
accept a Zener barrier and a zone of 10 intrinsically safe detectors. End of line for this
zone now becomes 6K8 and the diode in the detector base must be removed. The
maximum number of addressable CZMUs per loop is 20.
Shop unit interface
MSU840
MSU840 accepts a zone of conventional detectors plus an unlimited number of
callpoints which can be connected to the same input as the detectors or a separate
callpoint input if required. It also has a 24V 1A rated relay output, and a facility to
connect a power supply, which can then be monitored for fault. In addition it has
the facility to connect two circuits of conventional polarised sounders, which are
monitored by means of an end of line resistor and powered in alarm conditions from
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