The output parameters for the initiating circuits with ZDM modules are as follows:
Voltage 24 VDC (nominal)
Max. ripple voltage .672 VAC (RMS)
Standby Current .006 amp.
Alarm Current .032 amp.
Zone Alarm 2 amp. (resistive) @ 26 VDC dry contacts. Intended for connection to circuits
powered from a Listed power limited source of supply.
A. CODED OPERATION
All ZDM modules are normally configured for the
“latching” mode of operation. If coded operation
(from coded initiating devices) is desired, cut the
latch diode CR5 on the appropriate ZDM(s). CR5 is
located directly above the relay. (See Fig. 14 )
B. WATERFLOW DETECTION
When a zone is to be used for waterflow alarm
detection, the zone maintenance switch must be
bypassed (per U.L. 864).
Install Mini-jumper W1 as shown in Figure 14. The
notification appliances can only be silenced after the
waterflow device has been restored to normal. This
circuit may be wired Class A, Style D or Class B,
Style B .
C. GENERAL ALARM — ZONE JUMPER
CONFIGURATION
The zone jumper matrix and zone supervision jumpers should be configured in the following ways for general
alarm zones. (For other configurations see Table 1, Section 4.)
ONE ZONE - When only one zone is used, the J10A jumper to the right of the zone (Zone 1) should NOT be
removed. A diode jumper (1N4004) should be installed in position J3A.
TWO OR MORE ZONES - When two or more zones are used, diode jumpers should be installed in positions
J3A and J3B. The J10A, J10B jumper to the LEFT of each zone should be removed for supervision.
D. WIRING
U.L. Listed N.O. Detection Devices or 4- wire smoke detectors may be used. For FCI approved, U.L. Listed,
and Multiple Listed 2-wire smoke detectors, see FCI Addendum, P/N 9000-0427.
Class A, Style D Operation
Remove the 3.9K ohm, 1/2 watt resistor from Terminals 37 and 40, and connect it to Terminals 38 and 39.
Then connect field wiring per Figure 12. The maximum allowable resistance in the field wiring is 100 ohms per
zone for the ZDM/ZDM-D modules, and 50 ohms per zone for the VZM module.
Class B, Style B Operation
Remove the 3.9K ohm, 1/2 watt resistor between Terminals 37 and 40, and install it in parallel within the last
device on the circuit. Then connect wiring to Terminal 37 ( - ) and 40 (+). See Figure 13.
The maximum allowable resistance in the field wiring is 100/750 ohms per zone for the ZDM, 100 ohms per
zone for the ZDM-D and 50 ohms per zone for the VZM. Prior to installing the wires on Terminals 37 and 40,
read the resistance across the circuit. It should be between 3,900 and 4,000 ohms for the ZDM or ZDM-D and
3,900 and 3,950 ohms for the VZM.
E. OPTIONAL END OF LINE RESISTOR
With the ZDM only, a Class B circuit, when used with 3.3K EOL resistor, may have a maximum DC line
resistance of up to 750 ohms. (Not FM Approved)
MICROFUSE
MINI-JUMPER
W2
MAINTENANCE
ZDM
W1
SWITCH
ZONE
ZONE TROUBLE
LED (YELLOW)
S1
K1
4300-0018
CR5
ZONE ALARM
LED (RED)
2110-0014
Figure 14
9000-0007 Page 15 of 28
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