Eliwell RGF 312 - Page 22

RGF 300
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2.2.4 Remote connection for a current (mA) or voltage (Vdc) control signal
Connection of an external control unit (for SLAVE M, V)
If regulator control from an external unit is required, choose one of the following versions:
SLAVE M
when the external control unit uses a current control signal (
0-20 mA
), or
SLAVE V
when the external control unit uses a voltage control signal (
0-10 Vdc
).
This configuration allows a grid of several regulators to be controlled via a single regulation control signal in
either mA or Vdc, even if the regulators are a mixture of single phase and three phase.
It is therefore possible to control totally and automatically several ventilation units and, if necessary, to
release one or more regulators from automatic regulation that, using a local manual control signal (only with
0-10 Vdc
control), are regulated to the requested voltage.
The number of inputs available for differentiated control is
2
with priority going to the greater value.
See
fig. 14
for the layout of the connections.
10
9
8
7
6
5
4
3
2
1
GND
OUT
+V
10V
GND
IN 2
+V
10V
GND
IN 1
10
9
8
7
6
5
4
3
2
1
GND
OUT
+V
10V
GND
IN 2
+V
10V
GND
IN 1
set
CFI
on off
mode
AUTOMATIC CONTROL
0-20mA
set
CFI
on off
mode
set
CFI
on off
mode
100%0%
MANUAL SPEED
MANUALE CONTROL
0-10Vdc
SLAVE 'M' MODE
SLAVE 'V' MODE
AUTOMATIC CONTROL
0-20mA
AUTOMATIC CONTROL
0-10Vdc
mode
on
off
2
1
mode
on
off
2
1
mode
on
off
2
1