100 UDACT Instruction Manual — P/N 50050:M 12/18/2009
Appendix G: NCA-2 (UL 9th) and NCA (UL 8th)
G.1 General
The UDACT is capable of reporting a maximum of 568 zones or 2040 points when used with the
NCA or NCA-2. The first 568 points can be programmed using the Type Mode feature (refer to
“Type Mode” on page 52). All points greater than 568 can be transmitted only as fire alarm points.
For the UDACT to report a supervisory point to the central station, both the FACP and the UDACT
must have the point programmed as supervisory. Failure to program the panel or UDACT correctly
will result in a fire alarm signal being transmitted to the central station.
G.2 Mounting
If the UDACT is not mounted in the same cabinet that contains the NCA or NCA-2, it must be
mounted remotely in an ABS-8RB or UBS-1 enclosure placed within 6000 feet (1828.8 meters)
away from the control panel. For mounting instructions see "Remote Installation" on page 22.
If the NCA or NCA-2 is contained in a CAB-4 Series cabinet, then the UDACT may be mounted to
a CHS-4/CHS-4MB chassis assembly within that cabinet. For mounting instructions see "Internal
Installation" on page 18.
G.3 Wiring
G.3.1 Connections
Refer to Figure G.1 and Figure G.2 on page 101.
Connect the communication line between the EIA-485 terminal block TB3 on the NCA or TB7 on
the NCA-2 and TB1 terminals 3 and 4 on the UDACT, being certain to observe polarity.
If no other devices are connected to the EIA-485, install a 120 ohm EOL resistor across UDACT
TB1 terminals 3 and 4.
Connect the Ground Wire (PN 71073, provided) from the UDACT earth terminal on TB3 to the
chassis or to a solid building earth ground.
Connect 24VDC filtered, non-resettable power from TB1 on the NCA or TB6 on the NCA-2 to
TB1 terminals 1 and 2 on the UDACT. Power can also be supplied from TB6 on an AMPS-24/E
when using an NCA-2.
G.3.2 Notes
1. Ferrite cores, PN 29090, are recommended for all applications regarding the NCA.
2. Recommended wire is 12 AWG (3.25mm
2
) to 18 AWG (0.75mm
2
), twisted pair, shielded
cable. Connect only one end of shield: a) shield may be connected to cabinet (earth ground) at
fire alarm panel, or b) shield may be connected to TB1 Terminal 5 (Shield) at UDACT as
shown in Figure G.1.
3. Conduit is recommended for external wire runs. Consult local building codes.
4. Refer to "Specifications" on page 13 for power requirements.
Use Table H.1 through Table H.3 in Appendix H as worksheets for the NCA or NCA-2.
!
CAUTION: Remove all power from the control panel by disconnecting AC and batteries before
making any connections to prevent personal and/or circuit damage.
NOTE: The shield end that is not connected should be insulated to prevent accidental grounding.
Do not connect both ends of shield under any circumstance since a ground fault may result.
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