Mounting
80
UDACT Instruction Manual PN 50050:H 09/16/2002
Mounting
The UDACT may be mounted in the System 5000 control panel enclosure or be mounted remotely
using an ABS-8R 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 20 for installation
instructions.
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 20 and Figure 19 on page 81.
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.
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 20.
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.
3. Conduit is recommended for external wire runs. Consult local building codes.
4. Refer to "Specifications" on page 13 for power requirements.
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