Warren Controls PICV Series - Manual (Page 19)

19
PRESSURE INDEPENDENT CONTROL VALVE PICV_IOM_REVF_0114
VM1500E MOTOR ACTUATOR
Installation of modification circuit board • PUR 1137
IN KIT NUMBER KVM1500EFB4TO20MA00
to convert native 2-10 vdc feedback output to optional 4-20 mAdc.
PUR 1137
4-20 mAdc Mod. Board
OVERVIEW:
VM motor actuators feature a native DC voltage position feedback output available
at motor terminals
X (+) and SN (-). Addition of the optional circuit board shown
above converts the feedback output to 4-20 mAdc, available at terminals 4-20mA
(+) and N (-), capable of working into load resistances as high as 550 ohms. The
circuit operates on 24 vac fed from terminal
SP (hot) to terminal SP on the mod.
board, and terminal SN (common) to terminal SN on the mod. board. A single wire
brings feedback from motor terminal X to mod. board terminal 2-10V. An adjust-
ment potentiometer on the mod. board can calibrate the 4-20 mAdc feedback out-
put at any critical point in the actuator’s travel. Nominal adjustment span, when
voltage feedback is 2 vdc, is from 3.5 to 4.5 mAdc output.
MATERIALS & TOOLS:
Wires and mounting screws are provided in the kit. The illustration that follows
shows RED wire insulation for power (hot), BLACK for power (neutral) and GREEN
for feedback. Stranded wire is used to avoid difficulty in connecting two wires to a
single terminal on the motor board. A small straight-bladed screwdriver is needed
for the wiring terminals, and a #2 Phillips screwdriver for the mounting screws
VM1500E KVM1500EFB4TO20MA00
A. Using two mounting screws, fasten the mod. board to the two existing bosses on the motor housing. Note the rectangular wire-
clearance cutout at the upper left.
B. Install the RED wire from motor board terminal SP to mod. board terminal SP.
C. Install the BLACK wire from motor board terminal SN to mod. board terminal SN.
D. Install the GREEN wire from motor board terminal X to mod. board terminal 2-10V.
E.
Installation is complete. Connect the motor actuator in accordance with the Installation, Operating & Maintenance manual, except that
feedback output is now located at mod. board terminals 4-20mA (+) and N (-).