Initiating Device
Circuit Module
3-IDC8/4
SPECIFICATION DATA
FEATURES
• Eight Supervised Class B Hardwired Circuits for Input
Circuits or Up to Four Notification Appliance Circuits
• Programmable State Impedance Supports Compatible
Conventional Smoke Detector
• Latching or Nonlatching by Circuit
• Alarm Verification Selectable by Circuit
GENERAL
OPERATION
The Initiating Device Circuit (IDC) module is a local rail
module that provides an interface between conventional
hardwired circuits and the Excel Life Safety system. The
Initiating Device Circuit module (3-IDC8/4) provides eight
supervised Class B input circuits. Four of the eight circuits
can be configured as notification appliance circuits. The IDC
module supports a wide range of wire sizes to accommodate
retrofits. Removable field wiring terminals on the IDC module
facilitate troubleshooting and servicing of field wiring. In
addition, any Control Display module can mount to the front
of an IDC module.
The IDC module is ideal for retrofit projects and can allow
connection of existing wiring, traditional two-wire smoke
detectors, and signals. The IDC module can be configured
for n.o. contacts and supports supervised supervisory and
monitor circuits with latching and nonlatching operations.
Using a monitor circuit with nonlatching operation, the IDC
module can function as a supervised event follower. Circuits
can annunciate on the LCD Operator Interface, Control
Display modules, or any other display device on the network.
® U.S. Registered Trademark
Copyright © 1998 Honeywell Inc. • All Rights Reserved
The IDC module handles up to 30 photoelectric or 50
ionization smoke detectors per circuit. For input circuits, the
IDC module provides software to select impedance ranges
so compatibility with many type of conventional smoke
detectors is possible. The software provides four groups of
impedance levels: open circuit, high impedance, low
impedance (relative to the main impedance setting), and
shorted condition. The software accommodates European
alarm circuit operation.
74-2680-1
INITIATING DEVICE CIRCUIT MODULE
Both retard and reset time periods are programmable for
smoke detectors to support alarm verification. This capability
gives circuit by circuit operational flexibility. The confirmation
time is always 60 seconds.
ALARM VERIFICATION
RETARD-RESTART PERIOD
MAXIMUM 60 SECONDS
RETARD
RESET
PERIOD
CONFIRMATION PERIOD
60 SECONDS
DETECTOR
RESTART
M10224
Four of the eight IDC circuits can be configured for Class B
(Style Y) notification appliance circuits. The circuits use
traditional reverse polarity operation for polarized bells,
horns, and strobes. The notification appliance circuits are
arranged in pairs. Each circuit pair distributes 3.5A at 24 Vdc
from the local rail or a single riser. Supported riser sources
include a pulsed 3.5A at 24 Vdc temporal pattern for audible
signals or an audio source of up to 100W at 70 Vrms for
speakers.
Electrical Characteristics:
Standby Current: 71 mA
Alarm Current: 141 mA
Notification Appliance Circuit:
Rating: 3.5A at 24 Vdc
EOLR: 15 Kohm
Line Resistance: 50 ohm max under full load
Line Capacitance: 0.33 µF max
Rail/Riser Rating:
Max. Current Rating: 3.5A at 24 Vdc
Audio Riser Rating: 100W at 70 Vrms, 60W at 25 Vrms
Shipping Weight:
0.8 lb (0.36 kg)
Agency Listing:
UL, ULC
INITIATING DEVICE CIRCUIT (IDC)
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1 4
2 3
SPECIFICATIONS
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Model:
❑ 3-IDC8/4 Initiating Device Circuit Module, mounts on
one local rail module
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UL/ULC LISTED
4.7K
EOL
DETECTOR
DETECTOR
BASE
BASE
CONNECT TO IDC 3, 4, 5, OR 6
IDC/NAC 1, 2, 7, OR 8
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M10225
Fig. 1. Typical IDC Module Input Circuit.
Initiating Device Circuit:
EOLR: 4.7 Kohm
Circuit Resistance: 50 ohm max
Capacitance: 100 µF max
NOTIFICATION APPLIANCE CIRCUIT (NAC)
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Terminal Wire Sizes:
18 to 12 AWG (0.8 mm2 to 3.3 mm2)
Typical Wiring:
See Figures 1 and 2
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UL/ULC LISTED
15K
EOL
CONNECT TO IDC/NAC 1, 2, 7, OR 8
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M10226
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Fig. 2. Typical IDC Module Notification Appliance Circuit.
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7
Honeywell Latin American Region
480 Sawgrass Corporate Parkway
Suite 200
Sunrise FL 33325
Honeywell Europe S.A.
3 Avenue du Bourget
1140 Brussels
Belgium
74-2680—1 L.A. 4-98
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper 2
fibers.
Honeywell Asia Pacific Inc.
Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong
www.honeywell.com