Bernard Controls EZ Serie Inbetriebnahmeanleitung Seite 10

Signal direction inversion
The TAM transmitter, when supplied with a standard actuator, provides a signal that rise from close
position to open position, the standard opening direction being counter-clockwise.
If an opposite signal variation is required, simply move 2 jumpers on the board near the potentiometer.
Direct signal : jumpers on 1-3 and 2-4
Reversed signal : jumpers on 1-2 and 3-4
Settings
Connect a milliampermeter at the place of burden.
- Always start by adjusting the 0/4mA.
- Drive actuator to the position corresponding to the 0/4 mA (closed
position),
- Hold the pinion located just under the plate with the «0% position»
marking while driving the potentiometer screw. Adjust the poten-
tiometer so that the output current reaches a minimum value. Turn
backwards until the current value regularly increases then turn
backwards again and stop as soon as the minimum value determined
here above has been reached. The potentiometer is then positioned
at the very beginning of its track.
- Then, use the TAM adjustment screw marked as «0/4mA» to adjust
the current to a value as close to the 0/4 mA as possible.
- Drive actuator to the position corresponding to the 20 mA (open position),
- Turn the screw marked «20mA» in order to read exactly 20 mA on the milliampermeter.
- Come back to the closed position and check that, for the 0% position, the signal current shows
a close to 0/4 mA and repeatable value.
4.5 auXiLiairY controL switches
The OPEN and CLOSED signalling can be managed separately by two separated control switches.
These switches are actuated by brown and grey cams.
They can be connected through terminals 20 to 25 as follow :
4.6 heating resistor
Each actuator includes a heating resistor. As soon as the actuator is installed in the field, it is
recommanded du supply the resistor to prevent condensation.
4.7 caution
Replace covers immediately after start-up and make sure that their seals are clean. Never fail
to replace the protection covers. If water ever enters, dry thoroughly before replacing covers.
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5 coMMissioning - actuator with MinigaM positionner
5.1 Description
MINIGAM+ controls are used for valve class III positionning and is operating with 0-20mA, 4-20mA or 0-10V
input signals. MINIGAM+ control board allows an accurate positioning (<2%).
The dead band can be set to adjust the accuracy of the positioning.
5.2 notes regarDing the eLectricaL connections
The MINIGAM+ is driven by an analogue signal and supplies an output signal for remote position indica-
tion. The signal cables have to be of a shielded type and be separated from power supply wires (1-inch
distance min.). Otherwise interference may occur.
The cable shield must be connected to terminal 71 and isolated from the earth. If motorised valve setting
has not already been done by the valve supplier, please proceed as stated below.
For the connection of the other components, see other chapters (Heating resistor, signalling switches ...)
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