Flowserve 400MD Logix - Manual (Page 20)

Figure 5.4 Logix 3400MD Digital Positioner Mounted to a Diaphragm Actuator
5.3 Wiring Logix 3400MD Digital Positioner
Wiring the Logix 3400MD Digital Positioner to a Fieldbus Network
The Logix 3400MD digital positioner is designed to operate in a two-wire fieldbus network. Although wiring the Logix 3400MD 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 3400MD digital positioner to a fieldbus network segment. A procedure is given in this section
for properly wiring the Logix 3400MD 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 informa-
tion on wiring fieldbus devices and building fieldbus networks.
Fieldbus Device Profile Type
The Logix 3400MD 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
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 3400MD 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
X X FISCO
CAUTION: If the user is installing intrinsically safe field devices in hazardous areas, several points should be considered. See Intrin-
sically Safe Applications section.
Logix 3400MD Digital Positioner Wire Connections
Fieldbus signal communications and DC power are supplied to the Logix 3400MD digital positioner using the same fieldbus twisted-pair
cable.
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
20