Flowserve 3400IQ Digital Positioner - Manual (Page 19)

1
Logix 3400IQ Digital Positioner FCD LGENIM3401-00 – 06/06
flowserve.com
Linear Double-acting Actuators
For a linear air-to-open actuator, the Output 1 port of the positioner manifold is tubed to the bottom
side of the actuator. The Output 2 port of the positioner manifold is tubed to the top side of the
actuator. For a linear air-to-close actuator the above configuration is reversed.
Rotary Double-acting Actuators
For a rotary actuator, the Output 1 port of the positioner manifold is tubed to the bottom side of the
actuator. The Output 2 port of the positioner manifold is tubed to the top side of the actuator. This
tubing convention is followed regardless of air action. On rotary actuators, the transfer case orienta-
tion determines the air action.
Single-acting Actuators
For single-acting actuators, the Output 1 port is always tubed to the pneumatic side of the actuator
regardless of air action. The Output 2 port must be plugged.
6 Wiring and Grounding Guidelines
(See Figure 6)
c WARNING: This product has electrical conduit connections in either thread sizes 1/2" NPT
or M20 which appear identical but are not interchangeable. Housings with M20 threads
are stamped with the letters M20 above the conduit opening. Forcing dissimilar threads
together will damage equipment, cause personal injury and void hazardous location
certifications. Conduit fittings must match equipment housing threads before installation. If
threads do not match, obtain suitable adapters or contact a Flowserve representative.
6.1 FF Command Input Wiring
The Logix 3400IQ is non-polarity sensitive. Wire FF source to the input terminals (see Figure 6).
Minimum operating voltage is 9 VDC.
The FF signal to the Logix 3400IQ digital positioner should be in shielded cable. Shields must be
tied to a ground at only one end of the cable to provide a place for environmental electrical noise
to be removed from the cable. In general, shield wire should be connected at the source. Refer to
guidelines in FF AG-181 for proper wiring methods.
NOTE: The Logix 3400IQ positioner carries an intrinsically safe barrier rating of 250 mA. Input
currents should not exceed 250 mA, 5 watts.
6.2 Grounding Screw
The green grounding screw, located inside the termination cap, should be used to provide the unit
with an adequate and reliable earth ground reference. This ground should be tied to the same ground
as the electrical conduit. Additionally, the electrical conduit should be earth grounded at both ends of
its run.