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MIW-RTVS8-EN-000 - 16 / 02 / 2022
10 - 13
RTVS8
115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
Operational diagram
115 VAC / 50—60 Hz power supply
0
0
55
70
85
95
115
(40)
20
40
60
80
95
0
0
110
140
170
190
230
(80)
20
40
60
80
95
Digital Control signal
(dynamic percentage) [%]
Hysteresis
2—10 %
U (VAC)/
Speed
230 VAC / 50—60 Hz power supply
0
0
55
70
85
95
115
(40)
20
40
60
80
95
0
0
110
140
170
190
230
(80)
20
40
60
80
95
Digital Control signal (dynamic
percentage) [%]
U (VAC)/
Speed
Hysteresis
2—10 %
OPERATING INSTRUCTIONS
NOTE
On start-up the green COM LED blinks fast for 15 seconds to indicate that the
device is initialising.
■
Make sure the connections are correct before you power the unit.
■
Make sure the mains supply voltage is within the admissible rated maximum
current of the product.
ATTENTION
1.
Switch off the mains power supply before connecting any power cables.
2.
Install the connected sensor in an appropriate zone in order to measure the
relevant ambient conditions.
3.
Select the operating mode via Modbus Holding Register 11. The default mode is
Automatic forward mode
.
3.1
Manual mode
The value is taken by Holding Register 12, where you can set the desired
output step (see the steps and corresponding voltages in
Table 1
above.)
3.2
Automatic modes
When Auto mode has been selected, the controller changes the five speeds
automatically according to the values measured by the sensor connected to
the RJ45 master socket. There are two automatic modes:
