Bernard Controls Range EZ Serie Instructions De Mise En Service page 6

On support column mounted version (EZ4 to EZ15 actuactors)
To mount the potentiometer device, screw the support column on the mounting plate and engage the driving
pinion into the camblock wheel.
Drive the actuator to the OPEN position and write down the resistance value corresponding to the
100% position. Come back to the closed position and check that, for the 0% position, the resistance
shows a close to zero repeatable value.
Signal inversion:
To inverse the signal variation direction, invert potentiometer wires on the actuator terminal board
(e.g. for a connection on 16/17/18, invert 16 and 18).
4.4 «TAM» POSITION TRANSMITTER
(EZxxxx FA XX 123 A2 only)
6
To adjust the potentiometer resistance value, loosen the nut with the
wrench and rotate potentiometer until the signal requested is archieved.
To set the 0%, drive the actuator to the closed position.
Resistance value is measured between terminals 16 and 17.
Rotate the potentiometer so that the resistance value exceeds 0 Ohm
and regularly increases then turn backwards to reach a value as close
to 0 Ohm as possible.
Retighten nut after setting.
The TAM transmitter delivers a 4 to 20 mA signal linearly proportional
to the angular position of the valve.
Electric connections
Refer to the wiring diagram supplied with the actuator.
FIltered or stabilised power supply should be provided within the 12
to 32 VDC range. Maximum admissible ohmic load values are given in
the table :
Energy Supply Max. admissible
DC (VOLT)
12
24
30
load Ohm
150
750
1050