Document 50934 Rev B 5/15/00 PN 50934:B
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The ADT-UDACT is capable of reporting up to 2,040 points when used with the Unimode
2020/1010 (1,980 Addressable devices plus 60 zones or 1,800 Addressable devices plus
240 zones) The first 568 points can be programmed using the Type Mode feature (refer to
Section 4.2). All points greater than 568 can be transmitted only as fire alarm points. For
the ADT-UDACT to report a supervisory point to the central station, both the FACP and
the ADT-UDACT must have the point programmed as supervisory. Failure to program the
panel or ADT-UDACT correctly will result in a fire alarm signal being transmitted to the
central station.
The ADT-UDACT may be mounted in the Unimode 2020/1010 control panel using the
CHS-4 chassis or remotely in an ADT-ABS-8RF or ADT-UBS-1F enclosure up to 6000
feet away from the control panel. All power must be removed from the control panel before
making any connections to prevent circuit damage. The EIA-485 serial interface is connected
between the control panel and ADT-UDACT using twisted, shielded pair wire. Power should
be wired from the control panel's main power supply 24 VDC (nominal) filtered, nonresettable
output to TB1 on the ADT-UDACT.
Note: The ADT-UDACT does not support voice and burglar options when used with the
Unimode 2020/1010. Refer to the Unimode 2020/1010Manual for additional restrictions.
ADT-UDACT mounting in a Unimode 2020/1010
Remove all power from the FACP by disconnecting AC and batteries. Install the three supplied nylon support posts for
the top and bottom left of the ADT-UDACT, one aluminum/nylon and one aluminum standoff in the CHS-4 chassis slot
in which the ADT-UDACT is to be installed (refer to Figure D-2). Position the ADT-UDACT on the standoffs and secure
on aluminum standoff with a #6-32 screw.
Connect the communication line between the EIA-485 terminal block on the Unimode 2020/1010 SIB card and TB-1
terminals 3 and 4 on the ADT-UDACT being certain to observe polarity (refer to Figure D-3). Recommended wire is
12 AWG to 18 AWG twisted pair. If no other devices are connected to the EIA-485, install a 120 ohm EOL resistor
across ADT-UDACT TB1 terminals 3 and 4.
Connect the supplied Ground Strap from the ADT-UDACT Earth Ground terminal on TB3 to the CHS-4 chassis. Connect
24 VDC filtered, regulated power to TB1 terminals 1 and 2 on the ADT-UDACT.
Appendix D: Unimode 2020/1010

Figure D-2: ADT-UDACT Mounting in CHS-4

CHS-4
ADT-UDACT
Nylon Support Posts
Ground Strap
Nylon and Aluminum Standoff
Aluminum Standoff and Screw

Figure D-1:

ADT-UBS-1F

6708ubs.wmf
UDACCHS4.WMF