WT.050.130.000.UA.IM.1108
ACUTEC
™
35 SYSTEM
18
3.1
Power Supply Operation (See Dwg. 50.130.000.001)
The power supply provides a regulated 13.7 Vdc to Receiver Modules and
to the Battery Back-up through three sets of terminals at the top of the
module. Total output current is rated at one amp.
The power supply provides a SPDT relay contact which de-energizes when
ac power is lost.
3.2
Receiver Module Operation
Receiver Modules provide the following features:
• LED power on indicator with gas symbol designation.
• LED indicator lamps for WARNING and ALARM.
• Three SPDT alarm relays, switch programmable to operate on Warn-
ing or Alarm level, for latching or non-latching operation, and to be
maintained normally energized or normally de-energized. In addition,
Alarm Relay 3 may be configured to control an external horn.
• LED indicator lamp for SENSOR TROUBLE condition.
• One SPDT Trouble Relay, for remotely indicating a SENSOR TROUBLE
condition.
• Isolated remote reset input terminals for remote alarm acknowl-
edgement.
• Supplies power for operation of a Sensor/Transmitter up to 1000
feet away.
• Controls the Autotest Gas Generator.
In addition, Monitor type Receivers provide the following functions:
• LED digital display of gas concentration in ppm.
• Isolated 4-20 mA output signal proportional to gas concentration.
3.2.1 Configuration
Switches
Receivers for different gases are identical except for the gas symbol at-
tached to the green power LED. Operating range, setpoints, relay con-
figuration, display intensity, alarm delay, and Auto-Test activation are
selectable using four banks of DIP switches located on the configuration
circuit board inside the Receiver module.
The configuration switches can be adjusted as follows:
CAUTION: To protect internal components from possible damage,
this procedure should be performed in a static free environment.
a. Remove all power from the gas detector unit.
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