Electrical Connections For 3620J Positioners; Calibration - Emerson Fisher 3610J Instruction Manual

3610J and 3620J Positioners
September 2017
Electrical Connection for 3620J Positioners
WARNING
Personal injury or property damage may result from fire or explosion if power is not disconnected before removing the
3622 converter cap.
For Class I, Division 1 explosion‐proof applications, install rigid metal conduit and a conduit seal no more than 457 mm (18
inches) from the 3622 converter. Personal injury or property damage may result from explosion if the seal is not installed.
For intrinsically‐safe installations, refer to the appropriate loop schematic, shown in figures 31 and 32, or to instructions
provided by the barrier manufacturer for proper wiring and installation.
Select wiring and/or cable glands that are rated for the environment of use (such as hazardous area, ingress protection and
temperature). Failure to use properly rated wiring and/or cable glands can result in personal injury or property damage
from fire or explosion.
Wiring connections must be in accordance with local, regional, and national codes for any given hazardous area approval.
Failure to follow the local, regional, and national codes could result in personal injury or property damage from fire or
explosion.
Use the 1/2‐14 NPT conduit connection for field wiring installation. Refer to figures 11 and 12 when connecting field
wiring from the control device to the converter. Connect the positive wire from the control device to the converter +
terminal and the negative wire from the control device to the converter - terminal. Do not overtighten the terminal
screws. Maximum torque is 0.45 NSm (4 lbfSin).
Figure 11. Fisher 3622 Converter Equivalent Circuit
4‐20 mA
5.6 V
21B2335‐D
A5578‐1

Calibration

The following calibration procedures are for pneumatic positioner adjustment. For 3620J, 3620JP, or 3621JP
positioners, there are no adjustments within the converter portion of the positioner. All adjustments are accomplished
within the pneumatic portion of the positioner.
22
5.6 V 5.6 V
60 OHMS
60 OHMS
Figure 12. Typical Field Wiring Diagram
TERMINAL
BLOCK
CONTROL
FIELD WIRING
+
DEVICE
-
-
NOTE:
1 FOR TROUBLESHOOTING OR MONITORING OPERATION,
AN INDICATING DEVICE CAN BE A VOLTMETER ACROSS
A 250 OHM RESISTOR OR A CURRENT METER.
A5577
Instruction Manual
D200149X012
CONVERTER
HOUSING
+
EARTH
GROUND