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MIW-DXH-EN-001 - 02 / 10 / 2017
6 - 10
3.
Adjust the standalone settings:
3.1
Select the sensor range by JP3. See
Fig. 2
Sensor range selection jumper
and the enclosed information.
3.2
Select the desired relay switching point by setpoint trimmer VR1. (See
Fig. 3
.)
3.3
Select the analogue output mode by JP5. (See
Fig. 4
.)
3.4
To reset the Modbus settings, put and hold jumper P1 for 20 seconds.
(See
Fig. 5
Modbus reset jumper
.)
Fig. 2 Sensor range
selection jumper
Fig. 3 Setpoint trimmer
Fig. 4 Analogue output
selection jumper
Fig. 5 Modbus reset jumper
5
4
3
2
1
2
0
—
9
0 % r
H
5
4
3
2
1 0 —
6
0 %
rH
5
4
3
2
1
0
—
8
0 %
rH
5
4
3
2
1
0 —
9
5 %
rH
0—20 mA
0—10 VDC
5 4 3 2 1
Put and hold for 20
seconds
4.
Check if your unit starts or terminates the network (see
Example 1
and
Example 2
). If it does, put the NBT (JP6) jumper onto the pins. If it does not,
leave the jumper open. (See
Fig. 6
Network bus resistor jumper.
)
Example 1
Example 2
Fig. 6 Network bus
resistor jumper
Slave 1
RX
ТX
NBT
NBT
NBT
Slave 2
Master
Slave n
Slave 2
Slave 1
RX
ТX
NBT
NBT
Master
Slave n
ATTENTION
If an AC power supply is used with any of the units in a Modbus network, the
GND terminal should NOT BE CONNECTED to other units on the network or
via the CNVT‑USB‑RS485 converter. This may cause permanent damage to the
communication semiconductors and / or the computer!
DXH
DUCT HUMIDITY
SENSOR / SWITCH
