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Document # 50049 Rev D 5/2/97 P/N 50049:D
Relay Driver
The UDACTF's open collector output on TB3, terminal 2 is provided for Communi-
cator Failure and UDACT-F trouble. It can be used to drive UL listed relay MR-101/
C or MR-201/C. The output is rated for 40 mA. The normal condition for the output
is Off (deenergized).
Communicator Failure occurs when the maximum number of attempts to reach both
central stations has taken place or when both phone lines are disconnected. UDACT-
F trouble conditions include loss of telephone line voltage to the primary and/or
secondary phone lines, communication failure to the primary or secondary central
stations or total communication failure.
Wiring from the UDACT-F terminal TB3 to the relay must be in the same room no
more than 20 feet in length and enclosed in conduit. Wiring from the relay output
contacts must also remain in the same room as the UDACT-F.
When the UDACT-F is programmed as 'Receive Only' (typically this occurs when
annunciators are also used and are set for 'Receive/Transmit'), the relay output is
used to provide a UDACT-F trouble input to the host control panel. For MS-9200
applications, use a monitor module to supervise the relay closure. Refer to Figure 2-
9. Program the adjective and noun fields for 'UDACT Trouble'. For Sensiscan 2000
applications, wire the relay output to the annunciator trouble input circuit or use the
relay to trigger zone trouble.
When the UDACT-F is programmed as 'Receive/Transmit', EIA-485 supervision and
UDACT-F trouble status are automatically handled by the host control panel.
Figure 2-9: Relay Driver Connections
Earth Gnd
Comm Fail
+24 VDC
Earth Gnd
Comm Fail
+24 VDC
TB3
TB3
* Note: The MR-101/C and MR-201/C include an enclosure.
MR-101/C *
MR-201/C *
Relay Energized LED
SPDT Contacts
10 Amps
@ 115 VAC
Connections must be
in same room as
UDACT-F
DPDT Contacts
10 Amps
@ 115 VAC
Relay Energized LED
All wiring to relay must
be in the same room
within 20 feet of UDACT-
F and in conduit.
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