Flowserve 3400IQ Digital Positioner - Manual (Page 27)

27
Logix 3400IQ Digital Positioner FCD LGENIM3402-00 – 0/07
flowserve.com
5.3 Wiring Logix 3400IQ Digital Positioner
Wiring the Logix 3400IQ Digital Positioner to a Fieldbus Network
The Logix 3400IQ digital positioner is designed to operate in a two-wire fieldbus network. Although
wiring the Logix 3400IQ digital positioner to a fieldbus network is a simple procedure, a number of
rules exist that should be followed when constructing and wiring a network. This section provides
general guidelines that should be considered when wiring the Logix 3400IQ digital positioner to a
fieldbus network segment. A procedure is given in this section for properly wiring the Logix 3400IQ
digital positioner.
For Detailed Fieldbus Wiring Information
Refer to Fieldbus Foundation document AG-140, Wiring and Installation 31.25 kbit/s, Voltage Mode,
Wire Medium Application Guide, for complete information on wiring fieldbus devices and building
fieldbus networks.
Fieldbus Device Profile Type
The Logix 3400IQ digital positioner is identified as either of the following fieldbus device profile types
in Table 5.1, (as per Fieldbus document FF-816):
Table 5.1 FOUNDATION fieldbus Profile Types
CAUTION: If the user is installing intrinsically safe field devices in hazardous areas, several
points should be considered. See Intrinsically Safe Applications section.
Logix 3400IQ Digital Positioner Wire Connections
Fieldbus signal communications and DC power are supplied to the Logix 3400IQ digital positioner
using the same fieldbus twisted-pair cable.
Inside the electronics housing of the Logix 3400IQ digital positioner is the terminal block for
connecting external wiring as shown in Figure 5.5. Table 5.2 explains the usage of the wiring
terminals for fieldbus use.
Figure 5.5 Logix 3400IQ Digital Positioner Terminal Block
Device Profile Type:
Characteristic
111 113
X X Uses standard-power signaling to communicate on a fieldbus network.
X X Is a bus-powered device. (The Logix 3400IQ digital positioner does not have an internal
power supply and so it receives its DC power from the fieldbus.)
X Is acceptable for intrinsically safe (I.S.) applications
X Is acceptable for non I.S. applications
FISCO