Honeywell XNX-AM Series Technical Manual page 54

XNX Universal Transmitter
S1 S2
J1 HART
1
2
3
4
5
+ 6
+24 7
Gnd 8
Sig 9
S3 S4
A 1
B 2
Terminal Block 2
IR Data
To Building
Ground
Local HART
IS Barrier
(optional)
HART
Adaptor
Figure 50. IR personality wiring - Searchpoint Optima Plus
Installation and Operation
Optional Local HART
IS Barrier must be
connected to J1
Searchpoint
Optima Plus
To Building
Ground
Conduit/armored cable
Local HART
IS Barrier
(optional)
RFI and EMC shield
HART
Adaptor
Earth loop through the
conduit/armored cable
must be avoided
Control
Room
Control
Room
Notes:
Ground loops through the armor must be avoided. If armor is connected to the XNX transmitter via a
conductive EXd cable gland, the armor must not be earthed at any other location (this will prevent ground
loops). Since it is already earthed at the transmitter. Armor must be grounded only if an isolating gland is used
to connect it to the transmitter.
Ground loops through the RFI and EMC shield must be avoided. RFI and EMC shield must be connected to a
clean/instrumentation earth ground at the control room. To avoid an earth loop, connect it only at the control
room (not at the transmitter).
Figure 51. IR personality wiring - Searchline Excel
52
Optional Local HART
IS Barrier must be
S1 S2
J1 HART
connected to J1
1
2
3
4
5
+ 6
+24 7
Gnd 8
Sig 9
S3 S4
A 1
B 2
Terminal Block 2
IR Data
Isolation kit is not
important in this
configuration
Internal
body screw
External
body screw
Mounting plate
must be connected to Searchline Excel
the same earth ground
as the XNX transmitter
To local
building
ground
Armor
XNX
Transmitter
RFI and EMC shield