SMC Networks IP8100-0 1 X83 Series User manual

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Document No.：IP80-OM00006-B
ELECTRO-PNEUMATIC POSITIONER
IP8100-0*1-*-X83
IP8100-0*1-*-X84
WITH OUTPUT CURRENT(4～20mADC)
SMC CORPORATION

Wiring and zero point / span adjusting of output
current of IP８100 type electro-pneumatic positioner
output signal specification (potentiometer built-in)
This product is IP8100 having potentiometer and the P.C.board built in it. It is for
ensuring actuator’s opening by 4～20mADC of output signal produced by supplying
power to it.
Supplying power can be set freely between DC12～35V.
1.Wiring of input signal , power source and ammeter
Connect input signal(for positioner control) to 1(+) and 2(－) of the terminal board.
Connect power source(for detecting output current) to 3(+) and 4(－) of the terminal
board.
Connect ammeter in series between (+)side and 3(+) of terminal board or (－)side and
4(－).
Please refer Fig.1 for wiring.
Fig1Wiringdiagram
NOTE
Allowable load resistance in drawing 1 depends on supply voltage
Allowable load resistance is obtained by the formula below.
Allowable load resistance ≦(Supply voltage －12V) ／20mADC －（１）
Normal output current is not be obtained if the load resistance value exceed the result
of formula(1). Please confirm internal resistance when selecting ammeter.
－1－

2.Zero・Span adjusting
This product requires zero・span adjustment of output current according to actuator’s
opening (rotating angle).
Please follow steps below.
① Set actuator’s output opening 0% after adjusting the zero・span.
② Output signal is connected to rise in normal operation(clockwise) when shipped.
To apply the positioner in reverse operation(counter-clockwise), swap terminal
″A″and″C″in Fig.2.
③ Loosen potentiometer set screws applying power and ensuring output current, then
rotate the potentiometer 10°～20°away from dead band (see Fig.3) to decide the
start point. Settle the potentiometer with the screws again(Refer ″Cautions ″！)
④ Adjust zero・span with variable resistor.
Adjust zero point and span alternately repeatedly as they act each other. Since this
variable resistor can be wound endlessly, do not overwind otherwise internal
equipment might be broken. Adjust them ensuring output signal.
Cautions(settling potentiometer)
(1) Output signal dose not go at the dead band of the potentiometer
(2) If set the start point(4mADC) at the border line of resistance portion and the
dead band, malfunction might be occurred.
(3) If output current is 0mADC during opening, the potentiometer is possibly used
across the border between the resistance and the dead band. Follow③of section 2
ensuring potentiometer rotating direction.
(4) When the positioner is used in reverse action, adjust the potentiometer fixing
position to avoid interpretation between cam and lead wire of the potentiometer.
Fig2.P.C.board
ＡBC
Ａ
－2－