Fisher 3620J Electric-Pneumatic Single-Acting Positioner
Products Description
Fisher 3620J Takes a standard 4–20 mA electrical signal and turns it into pneumatic output. Drives single-acting actuators with precision. Perfect for tying into DCS or PLC systems while keeping the benefits of pneumatics.
Technical parameters
|
Feature |
3620J |
|
Input |
4–20 mA DC (constant current), up to 30 V DC compliance |
|
Output |
Pneumatic pressure up to full supply pressure (≤ 150 psig) |
|
Actuator Compatibility |
Single acting pneumatic diaphragm or piston actuators |
|
Control Action |
Modulating, direct or reverse action possible through simple adjustments |
|
Adjustment & Tuning |
Zero, span and minor loop gain adjustable to match actuator and process conditions; ensures stable response and minimal hysteresis (~0.75% output span) |
Features
•Fisher 3620J Positioner Fast and accurate. Stands up to plant vibration.
•Pop the cover. Zero, span, and crossover adjustments are right there. Screwdriver is all you need.
•Tweak the minor loop gain to match your actuator size. Dial in the response.
•Supply pressure shifts? Barely any effect.
•Built for harsh spots. Case and seals hold up. Bleed air keeps internals clean.
•Switch direct or reverse action. Simple. No extra parts.
Application Scenarios
Fisher 3620J DCS/PLC integration in demanding environments such as：
Chemical
Petrochemical
water treatment
utilities, or power generation facilities
Which one should I pick-3610, 3620J, or 3610JP?
Q: Go with 3620J if:
A: You want pneumatic actuation but need to take electrical control signals. It bridges the gap-no need to swap out your actuator.
Q: 3620J also makes sense when:
A: You're building new control loops around DCS or PLC systems. Lets you keep your existing setup while moving to digital control.
Q: Pick 3620JP if:
A: You're running heavy-duty or double-acting actuators. Same benefits, built for bigger jobs.
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