<8. Detailed Data Setting>
8-16
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
8.6 Input Contact Settings
8.6.1 Input Contact Functions
The converter input contacts execute set functions by accepting a remote dry-contact (“voltage-
free contact”) signal. Table 8.14 shows the functions executed by a remote contact signal.
Table 8.14 Input Contact Functions
Item Function
Calibration gas pressure low Contact input disables Semi-automatic or Automatic Calibration.
Measuring range change While the contact signal is being input, mA output 1 switches as follows. When it
is switching, “Range” is displayed on the screen (see
“6.3.1 Home screen
and icons”).
When “Oxygen concentration” is selected for the setting item of mA output 1, the
output range switches to 0–25%O
2
or 0–100%O
2
.
When “Humidity” selected for the setting item of mA output 1, the output range
switches to 0–100%H
2
O.
When “Mixing ratio” is selected for the setting item of mA output 1, the output
range switches to 0–1 kg/kg.
When “RH(relative humidity)” is selected for the setting item of mA output1, the
output range switches to 0–100%R.H.
Calibration start Contact input starts Semi-Automatic Calibration. Calibration Mode setting must
be [Semi-automatic] or [Automatic]. Contact signal must be applied for at least
1 sec. Even if input signal continues to be applied, calibration is not repeated
unless contact input is released then reapplied.
Process upset
(Combustible gas detection)
Contact signal starts the operation with a single output signal of 1 second or
longer. During the operation, span contact of calibration contact operates.
When Auto calibration unit ZR40H is used and span gas (instrumentation air) is
connected, you can lead span gas to sensor unit as a safety purge.
When the combustible gas (unburned-gas) is detected, temperature of the
sensor unit falls and Fault is generated. Recovery is possible only if you shut
down and reboot or restart the system.
Blow back start When the signal is sent to contact input, the Blow back starts. The contact signal
starts operation with a single output signal of 1 to 11 seconds. While the signal
continues to be input, the second blow back does not occur. To have the second
blow back, release the contact signal once and input again.
Refer to section
“10.5 Blow Back”.
Restart Restarts the device when an contact signal is input. After restarting, restart from
warm-up mode.
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