Zeta Alarm Systems.
Classic 2000 Mk II Operation Manual
Revision 1.0
Part # MAN-Z3K-01
Page 74
6.1.5 ZCBM City Box/Reversing Polarity Module
The ZCBM (City Box Module) is a serial device and operates in two
modes – supervising a .250 Amp coil, or as a reversing polarity cir-
cuit. The system allows for up to 2 ZCBM modules to be connected
simultaneously, ZCBM #1 for alarm, and ZCBM #2 for waterflow
alarms. Two CBMs may be connected to two different outputs. It is
activated via the network interface, and has a fixed address system
address (no address programming required) and features the follow-
ing capabilities:
Supervises coil and activates an approved City Box.
Reports alarm and trouble via a reversing polarity connection
(+24VDC, Normal; 0VDC, Trouble; -24VDC, Alarm). The revers-
ing polarity circuit mode activates on General Alarm Group 99
(forZ CBM #1).
Provides Switch for manual disconnect during testing or service
Provides for silenceability and resound on subsequent alarms
Allows for 2 CBM modules to be connected
A 2-position DIP switch is provided on the ZCBM to allow selection
of the operational modes of the module. The #1 switch selects oper-
ation as a general alarm (Off) or waterflow alarm (On). Waterflow
alarm operation is not silenceable, general alarm features silence
with resound operation.
The #2 Switch selects the connection to a reversing polarity connec-
tion (Off) or a city tie box (On).
Please refer to the installation instructions included with the device.
6.1.6 Zeta Networked Digital Communicator (ZNDC)
The Networked Digital Communicator (ZNDC) is a UL listed dual-line dialer, that allows a Zeta
Alarm Systems Sigma Mk II or Classic 2000 Mk II fire alarm control panel to report events to a
central monitoring station, over the public phone system. The ZNDC supports the industry-stan-
dard Ademco Contact ID protocol for reporting the type and location of events. The ZNDC requires
the use of two phone lines. It is a resident of the RS-485 network, and therefore can be mounted
remotely. However, Zeta Alarm Systems require that the ZNDC be mounted inside one of our UL
listed enclosures, and be powered from an IPB-3 (Inline Power Booster), Sigma Mk II or Classic
2000 Mk II continuous 24VDC output. The ZNDC is compatible with several UL listed receivers,
including Sur-Gard, Ademco, FBI, Radionics, and Hoffman Osborne. This device also meets FCC
standards. Refer to the ZNDC Operation Manual for more information.
Figure W-13
Summary of Contents for Classic 2000 MKII
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