Honeywell XNX Technical Manual page 174

XNX Universal Transmitter
HART
Handheld
Communicator
S1 S2
Source
Sink
S1 S2
Isolated
+V 1-1
1-2
-V 1-3
1-4
+mA 1-5
-mA 1-6
EC TB-1
XNX
Address 7
NOTE: Only addresses greater than 0 are valid for multidrop HART networks.
Appendix A - HART Protocol
®
Other loop
powered
+ -
HART
devices
Figure 238. XNX Multidrop HART Network Wiring - Isolated
S1
S1 S2
Source
Sink
S1 S2
Isolated
+V 1-1
1-2
-V 1-3
1-4
+mA 1-5
-mA 1-6
EC TB-1
XNX
Address 2
172
S2
Source
Sink
S1 S2
Isolated
+V 1-1
S1 S2
Source
Sink
S1 S2
Isolated
+V 1-1
1-2
-V 1-3
1-4
+mA 1-5
-mA 1-6
EC TB-1
XNX
minimum
Address 1
External HART
Automation Equipment
+
24
VDC
-
+
24
250 Ω VDC
-