Bernard Controls SQX Series

33
To select the signals’ direction of variation and type
Select change in the MENU and turn to OK to confirm.
Select position in the CHANGE menu and turn to OK to confirm.
Select opt. posit. signal in the POSITION menu and turn to OK
to confirm.
Choose signal’s direction of variation and turn to OK to confirm.
Select signal type and turn to OK to confirm.
26 USE AS A POSITIONER WITH AN ANALOGUE CONTROL SIGNAL
(DEPENDING ON MODEL)
26.1
INPUT SIGNAL
On some models, the actuator can operate as a
positioner using a proportional command, such as a
4-20 mA analogue signal.
The input signal is automatically calibrated on the
actuator’s stroke (0 - 100%) and so there is no need
to adjust the actuator’s operating range.
The input signal is isolated from the on/off
commands and from the remote position signal.
The actuator can still be operated in on/off mode
with the open, close and stop
commands or using proportional control. One of the auxiliary commands must be used to select
between these two control modes.
In the standard configuration, auxiliary command is set for AUTO
/ ON-OFF to allow the control mode to be selected remotely:
AUTO = proportional control (analogue) or ONOFF= on/off
control. See section 11.2 for configuration details and information
on using this command.
Control signal
4-20 mA, 0-20 mA, 4-12 mA, 12-20 mA or 0-10 V
To select the signals’ direction of variation and type:
Select change in the MENU and turn to OK to confirm.
Select positioner in the CHANGE menu and turn to OK
to confirm.
Select signal type in the POSITIONER menu and turn to OK
to confirm.
Choose signal’s direction of variation and turn to OK to confirm.
Choose signal type and turn to OK to confirm.
With 0-10 V signals, two contacts are also switched to OFF.
The contacts are located on the INTELLI+ board (supporting
the display) inside the control unit.
OPT POSIT SIGNAL
signal ( ) opening
signal ( ) opening
SIGNAL ( ) OPENING
(4-20 mA)
(0-20 mA) / (0-10V)
(4-12 mA)
(12-20 mA)
Signal
Input impedance
(Ohms)
4-20 mA 160
0-20mA 160
4-12mA 160
12-20mA 160
0-10V 11000
30
31
-
+
4 - 20 mA
0 - 20 mA
0 - 10 V
SIGNAL RANGEL
signal ( ) opening
signal ( ) opening
SIGNAL ( ) OPENING
(4-20 mA)
(0-20 mA) / (0-10V)
(4-12 mA)
(12-20 mA)
51
A
B
ON
mA
Volt