Flowserve I90 Series Intrinsically Safe Modular Accessory System - Manual (Page 11)

2. Assemble the switches and adjustment plate to the
baseplate (item 4), as shown below, using the “loose”
#4-40 x 1" screw and the #4-40 x
C\," screw (item 5)
and #4 washer (item 6). Move the adjustment plate to
a middle position and tighten the screws.
2. CAMS
Assemble the first spring cam, the spacer, and second spring
cam. To work the spring cam down the shaft, squeeze the two
protrusions and turn. See Figure 19.
3. WIRING
NOTE: All wiring is to be run smoothly and neatly and
away from any rotating parts, using wire ties, if necessary.
Use caution to avoid pinching wires and/or solenoid leads
(if used) between the base and cover flanges.
a. The wire leads will be connected to the switches as
provided. Pay close attention to the switch labels,
schematics, wire colors, etc., when wiring the switches.
Switches are to be wired to the side terminal strip as
shown in the wiring diagram below.
NOTE: Wiring should be inserted only to mid-point of
terminal strip.
b. Route the wires between the legs of the black terminal
brackets whenever possible. Be certain that the wires will
not get fouled on the shaft when it rotates.
4. OPERATION
a. Once the M.A.S. unit has been assembled and connected
to the actuator, the switch cams can be set per user’s
requirements. Normally switch I indicates “closed” and
switch II indicates “open”.
b. The unit should be operated to ensure that switch
actuation occurs at the end of rotation (or in whatever
position is desired by the customer) repeatedly.
NOTE: FOR INTRINSICALLY SAFE SYSTEMS ONLY.
All inputs/outputs (“external” wiring connections) must be
run through approved intrinsic safety barriers.
IMPORTANT: Shielded cable must be used for each
intrinsically safe circuit and the shield must be connected
to Zener barrier ground.
Flow Control Division
Worcester Controls
WCAIM2033 Intrinsically Safe Modular Accessory System (Series I90) 11
Figure 19