Wiring And Grounding Guidelines (See Figure 6); Ff Command Input Wiring - Flowserve Logix 3400MD User Instructions

6 Wiring and Grounding
Guidelines
(See Figure 6)
0 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 certifica-
tions. Conduit fittings must match equipment housing threads
before installation. If threads do not match, obtain suitable
adapters or contact a Flowserve representative.
Figure 7: Compliance Voltage
FF
Signal
Source
Logix 3400MD Digital Positioner FCD LGENIM3404-00 – 9/09
Figure 6: Field Termination
FF Field
Terminators
Environmental
Seal
6.1

FF Command Input Wiring

The Logix 3400MD 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 3400MD 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.
R (if present)
barrier
Current
23 mA
External
Bonding
Location
Housing EARTH
Terminal
Connect Shield at Source
Shielded Cable
FF Signal
R
wire
+
Compliance
9 VDC min
Voltage
-
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Logix
3400MD
13