© 2014 UTC Fire & Security Americas Corporation, Inc.
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P/N 270492-
EN • REV 04 • ISS 10JUL14
3-IDC8/4 Traditional Zone I/O Module
Installation Sheet
Description
The 3-IDC8/4 Traditional Zone I/O Module provides eight
Class B traditional direct connect initiating device circuits
(IDCs) for compatible two-wire smoke detectors and dry
contact initiating devices. Four of the initiating device circuits
can be converted to Class B notification appliance circuits
(NACs). The four IDC/NAC circuits must be configured as
either an NAC or an IDC, never both.
Each IDC can be set for latching or nonlatching operation and
smoke verified or unverified operation using the software
definition utility.
Each pair of NAC circuits may be configured to provide
24 VDC
from the internal chassis rail,
24 VDC
from an external
power supply, or signals from an external source for
notification, audio, and telephone applications. NAC input
terminals are provided to supply the external signal source.
Installation
Install and wire the 3-IDC8/4 in accordance with applicable
national and local codes, ordinances, and regulations.
WARNING:
Electrocution hazard. To avoid personal injury or
death from electrocution, remove all sources of power and
allow stored energy to discharge before installing or removing
equipment.
Caution:
Equipment damage hazard. This product is sensitive
to electrostatic discharge (ESD). To avoid damage, follow
accepted ESD handling procedures
To install the 3-IDC8/4:
1. If circuits are configured as NACs, position jumpers at the
correct locations for an internal or external riser source.
See “
Jumper settings
” on page 2.
2. Install the module on the rail chassis, pressing the
mounting studs firmly into the mounting holes. See
Figure 1.
3. Connect field wiring. See “Wiring” on page 2.
Figure 1: Installing the 3-IDC8/4
(1) Mounting studs
IDC
/NA
C
IDC
/NA
C
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
1
5
2
3
7
4
8
6
IDC
/NA
C
IDC
/NA
C
IDC
IDC
IDC
IDC
NAC
IN
NAC
IN
1/2
5/6
R
X
TX
TB1
TB2
J
P1
J
P2
J
P3
J
P4
(1)
(1)
