46 Document # 50075 Rev B 3/13/95
Notes:
1) This arrangement allows use of the UNI•COM simultaneously with the RTM-8F module.
2) Ferrite cores are recommended for all applications.
3) Recommended wire is 12 AWG to 18 AWG twisted pair.
4) Shielded wire is not required (unless mandated by local AHJ).
If shielded wire is used, 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 UNI•COM as shown in
Figure D-3.

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) Connect Ground Strap (supplied with ADT-ABS8RF enclosure) from Earth Ground terminal on
UNI•COM to a solid building earth ground. Conduit alone will not provide a reliable earth ground.
7) UNI•COM may be located up to 6000 feet away from the host control panel.
8) Refer to Specifications for power requirements.
Install 120 ohm EOL
resistor (P/N: 71244)
on TB1 terminals 3
& 4 if last or only
device on EIA-485
line.
Unimode 200
Cabinet
Ferrite
Cores
P/N 29090
Figure D-3: External UNI•COM Mounting in ADT-ABS8RF
Supervised and Power
Limited EIA-485 and
power connections To
Phone
Lines
(Supervised)
Solid
Earth
Ground
Connection
Unimode 200
UNI•COM in ADT-ABS8RF
(shown with cover removed)
+24 VDC
Nonresettable
Power