Flowserve 3400IQ Digital Positioner - Manual (Page 28)

Logix 3400IQ Digital Positioner FCD LGENIM3402-00 – 0/07
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Table 5.2 Logix 3400IQ Digital Positioner Wiring Terminals
Wiring Terminal Use
Screw terminals Non-polarized Fieldbus cable connections
Quick clip terminals Signal + and - Fieldbus cable connections
Internal Ground Connection
An internal ground terminal is available next to the terminal. (See Figure 5.5.) The terminal can be
used to connect the Logix 3400IQ digital positioner to earth ground.
External Ground Connections
While grounding the Logix 3400IQ digital positioner is not necessary for proper operation, an external
ground terminal on the outside of the electronics housing provides additional noise suppression
as well as protection against lightning and static discharge damage. Note that grounding may be
required to meet optional approval body certification.
Intrinsically Safe Applications
Fieldbus barriers should be installed per manufacturer’s instructions for Logix 3400IQ digital
positioners to be used in intrinsically safe applications.
The Logix 3400IQ digital positioner carries an intrinsically safe barrier rating of 125 mA. Currents up
to 125 mA will not damage the device.
The number of field devices on a segment may be limited due to power limitations in hazardous area
installations. Special fieldbus barriers and special terminators may be required. Also, the amount of
cable may be limited due to its capacitance or inductance per unit length.
Detailed Intrinsically Safe Information
Refer to Fieldbus Foundation document AG-163, 31.25 kbit/s Intrinsically Safe Systems Application
Guide, for detailed information on connecting fieldbus devices for intrinsically safe applications.
Logix 3400IQ Digital Positioner Wiring Procedure
The following procedure shows the steps for connecting fieldbus cable to the Logix 3400IQ digital
positioner.
CAUTION: All wiring must comply with local codes, regulations, and ordinances.
1. Loosen end-cap lock and remove end-cap cover from terminal block end of positioner housing.
2. Feed fieldbus cable through one of conduit entrances on either side of electronics housing. Plug
whichever entrance not used.
CAUTION: The Logix 3400IQ digital positioner accepts up to 16 AWG (1.5 mm diameter) wire.
Figure 5.6 Logix 3400IQ Digital Positioner Terminal Block