Circuits; 1: Power Requirements; 2: Communications; 3: Primary And Secondary Phone Lines - Fire-Lite UDACT-F Instruction Manual

Circuits

1.5 Circuits
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 FACP, power is provided directly through UDACT-F connector J10 which connects
via supplied ribbon cable to the MS-9200 main circuit board connector J16.
1.5.2 Communications
Communications between the UDACT-F and the host FACP 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 12 AWG to 18 AWG (0.75 to 3.25 mm
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 VAC service, noisy electri-
cal circuits that are powering mechanical bells or horns, audio circuits above 25 volts
SCR power circuits.
Note: If the UDACT-F is installed in an MS-9200 FACP, the EIA-485 data line is supplied directly through UDACT-F connector J10
which connects via supplied ribbon cable to the MS-9200 main circuit board connector J16.
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 provided.
1.5.5 Earth Ground
Connect a separate earth ground wire to TB3 terminal 1 for transient protection. When mounted in the MS-9200 or
MS-9600, the UDACT-F receives an earth ground connection via the upper right corner mounting position.
1.6

Specifications

DC Power - TB1, Terminals 1 & 2
24 VDC (nominal) filtered, nonresettable and power-limited. Voltage range is 21.2 to 28.2 volts. DC power TB1 Ter-
minals 1(+), 2(-) 40 mA in standby, 75 mA maximum 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).
10
Document #50049 Rev.E0 1/22/01
2
, motor control circuits or
RMS
P/N 50049:E0
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