Data Sheet

3610J and 3620J Positioners
D200064X012
Product Bulletin
62.1:3610
February 2015
6
Figure 3. Schematic of Fisher 3610JP Positioner
38A8900-B
B1845-1
MINOR LOOP
GAIN ADJ
ZERO ADJ
RANGE SPRING
COARSE
SPAN
ADJ
CROSS-OVER
ADJ
RELAY BEAM
RELAY
B
RELAY
A
SUPPLY PRESSURE
NOZZLE PRESSURE
INPUT SIGNAL
OUTPUT SIGNAL
OUTPUT SIGNAL
AIR
SUPPLY
FINE
SPAN
ADJ
PIVOT
B
FEEDBACK
LEVER
INPUT MODULE
PIVOT A
FLAPPER
NOZZLE
FIXED
RESTRICTION
AIR SUPPLY
CAVITY A
CAVITY B
INPUT SIGNAL
PRESSURE
POSITIONER CAM
END VIEW OF
ROTARY SHAFT
PISTON
ACTUATOR
SUMMING BEAM
COUNTER SPRING
Type Number
Description1
The following descriptions provide specific
information on the different positioner constructions.
3610J: A single-acting pneumatic rotary valve
positioner for use with Fisher 1051 and 1052
actuators.
3610JP: A double-acting pneumatic rotary valve
positioner for use with Fisher 1061 and 1069
actuators.
3620J: A single-acting electro-pneumatic rotary valve
positioner for use with 1051 and 1052 actuators.
3620JP: A double-acting electro-pneumatic rotary
valve positioner for use with 1061 and 1069 actuators.
3622: An electro-pneumatic converter that converts a
4-20 mA DC input signal to a 3 to 15 psig (0.2 to 1.0
bar) input signal for the pneumatic positioner.
Combining this unit with a 3610J or 3610JP positioner
produces a 3620J or 3620JP positioner, respectively.
Principle of Operation
3610J positioners accept a pneumatic input signal and
3620J positioners accept a DC current input signal
from a control device.