9
Document # 50049 Rev D 5/2/97 P/N 50049:D
The UDACT-F circuit board contains a CPU, other primary components and wiring
interface connectors.
1.5.1 Power Requirements
Operating voltage for the UDACT-F must be power-limited, filtered, nonresettable
21.2 to 28.2 volts. The 24 VDC nominal operating power must be supplied by the
Control Panel and is connected to TB1 of the UDACT-F.
Note: If the UDACT-F is installed in an MS-9200 Control Panel, power is provided
directly through UDACT-F connector J10 which plugs into the MS-9200 main circuit
board.
1.5.2 Communications
Communications between the UDACT-F and the host control panel is accomplished
over a two wire EIA-485 serial interface which is power-limited and supervised by
the control panel and the UDACT-F. The wiring connections are made to the RS+,
RS- and Shield terminals of TB1 on the UDACT-F.
The EIA-485 circuit cannot be T-Tapped and must be wired in a continuous fashion
from the control panel to the UDACT-F and, if installed, an annunciator. The wire
must be 12AWG to 18AWG twisted shielded pair cable with a Characteristic
Impedance of 120 Ohms, +/-20%. Limit the total wire resistance to 100 Ohms on the
EIA-485 circuit. Do not run cable adjacent to, or in the same conduit as 120 volts
AC service, noisy electrical circuits that are powering mechanical bells or horns,
audio circuits above 25 volts
RMS
, motor control circuits, or SCR power circuits.
Note: If the UDACT-F is installed in an MS-9200 Control Panel, the EIA-485 data
line is connected directly through UDACT-F connector J10 which plugs into the MS-
9200 main circuit board.
1.5.3 Primary and Secondary Phone Lines - Modular jacks are used to interface
the primary and secondary phone lines to the public telephone network.
1.5.4 Communicator Fail Relay Driver - Relay driver output for Central Station
communication failure is available.
1.5.5 Earth Ground - Connect a separate earth ground wire to TB3 terminal 1 for
transient protection. When mounted in the MS-9200, the UDACT-F receives an
earth ground connection via a metal standoff located on the upper right corner
mounting position.
DC Power - TB1, Terminals 1 & 2
24VDC (nominal) filtered, nonresettable and power-limited. Voltage range is 21.2 to
28.2 volts. DC Power TB1 Terminals 1 (+), 2 (-) 40 mA in standby, 75 mA max.
while communicating (for MS-9200 installation use connector J10) and 100 mA with
the open collector output engaged and communicating.
Data Communications - TB1, Terminals 3 - 7
EIA-485 serial interface, TB1 Terminal 3 = RS+, 4 = RS-, 5= Shield, 6 = Future use,
7 = Future use. Power-limited source must be used. (For MS-9200 installation use
connector J10).
Auxiliary Output - TB3, Terminals 2 & 3
TB3-2 = Communicator Failure. Power-limited circuit. An Open Collector type
output, normally high, active low which sinks up to 40 mA. TB3-3 = 21.2 to 28.2
volts, power-limited. Use UL listed relay P/N: MR-101/C or MR-201/C with this
output.
1.5
Circuits
1.6 Specifications
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