Macurco MRS-485 Modbus RS-485 Adapter
REV – 1.0
[34-2900-0019-7]
25
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P a g e
e.
The Fan relay will be activated for the next 1 minute of the test, so if the fan circuits are wired in
the typical manner, the fan should run.
f.
The 4-20mA output will then ramp up from 4 to 16 mA over the next 130 seconds of the test, so if
the circuit is wired in the normal manner, the control panel or building automation system should
respond.
g.
At the end of the test cycle, the light will turn green and be on steady (Normal Operation), the fan
and alarm relays will be in standby mode and the 4-20 mA output will return to 4 mA in clean air
(Exception for Oxygen with OX-6).
8.
When testing is completed, reassemble the unit or units
8.2
Manual Operation Test
This option gives the user the opportunity to manually initiate an individual test for the audible buzzer, each
relay, the analog output and the sensor response to gas. From normal operation mode, press the Next button 2
times to get to the Test Mode (tSt). Press the Enter button once to get into the Test Menu. Press the Next
button to scroll through the Four test options and press Enter to initiate the selected test. Note that if the relay
or 4–20 mA output has been disabled, the test selection will not be displayed in the test menu.
bUZ
– Buzzer Test, 4 seconds
Art
– Alarm Relay Test, 6 seconds
Frt
– Fan Relay Test, 60 seconds
42t
– 420 Loop Test, 135 seconds
gSt
– gas test, xxx seconds (available on select detectors)
