Notifier UDACT

General
UDACT Instruction Manual PN 50050:H 09/16/2002 107
Appendix H: NCA
General
The UDACT is capable of reporting a maximum of 99 zones or 2040 points when used with the
NCA.
Mounting
If the UDACT is not mounted in the same cabinet that contains the NCA, it must be mounted remotely
in an ABS-8R/RB 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 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 20.
Wiring
CAUTION: Remove all power from the control panel by disconnecting AC and batteries before
making any connections to prevent personal and/or circuit damage.
Connections
Refer to Figure 27 and Figure 28 on page 108.
Connect the communication line between the EIA-485 terminal block TB3 on the NCA 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 NCA TB 1 to TB1 terminals 1 and 2 on the
UDACT.
Notes:
3. Ferrite cores, PN 29090, are recommended for all applications.
4. 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 27.
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.
5. Conduit is recommended for external wire runs. Consult local building codes.
6. Refer to "Specifications" on page 13 for power requirements.
Use Table 51 in Appendix I: AM2020/AFP1010 as worksheets for the NCA.
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