UDACT Instruction Manual — P/N 50050:M 12/18/2009 75
Mounting System 5000 (UL 8th)
D.3 Mounting
The UDACT may be mounted in the System 5000 control panel enclosure or be mounted remotely
using an ABS-8RB or UBS-1 enclosure placed within 6000 feet (1828.8 meters) of the control
panel. Refer to "Remote Installation" on page 22 or "Internal Installation" on page 18 for
installation instructions.
D.4 Wiring
D.4.1 Connections
Refer to Figure D.2 and Figure D.1 on page 76.
Connect the communication line between the EIA-485 terminal block on the System 5000 and TB-
1 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
CHS-4 Chassis or to a solid building earth ground.
Connect 24 VDC filtered, non-resettable power from the MPS-24A or MPS-24B (Main Power
Supply) to TB1 terminals 1 and 2 on the UDACT.
D.4.2 Notes
1. Ferrite cores, PN 29090, are recommended for all applications.
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 D.2.
3. Conduit is recommended for external wire runs. Consult local building codes.
4. Refer to "Specifications" on page 13 for power requirements.
!
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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