5�3 Modbus - Honeywell XNX Quick Start Manual

TB4
Remote
Reset SW
Relay Ratings
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
TB-3 RELAY
Warning: Power
externally supplied.
Disconnect at source
prior to servicing.
5.3 Modbus
®
Modbus connections to the XNX are made through a pluggable terminal block
®
on the Modbus® interface circuit board. A loop termination point (SW5) is
included on the Modbus® interface board to provide termination of the Modbus®
loop.
R =120
T
TB-3 Modbus
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
Use shorting jumper
supplied to maintain
connection during
service
Figure 25. XNX Modbus
XNX Universal Transmitter Quick Start Guide
250VAC 5A
24VDC 5A
NC
C
NO
NC
C
NO
NC
C
NO
supplied, disconnect at source
Figure 24. XNX relay option board and terminal block
Terminals 3-1 through 3-4 are provided to facilitate bus wiring;
there is no internal connection to other XNX circuitry. Terminal
3-1 is connected internally to 3-2. Similarly, terminal 3-3 is
connected to 3-4
S5 EOL Term
SW5 - Loop Termination
+
+
-
-
A
A
B
B
S
S
TB3 Modbus Connections
option board, terminal block, and jumper switch
®
TB3
TB4
TB3 Relay Connections
Warning: Power externally
prior to servicing
Relay Contact Ratings:
250 VAC 5 amps
24 VDC 5 amps
Use Jumper
to maintain
connection
during service
Relay
TB3
1 NC
2 C
3 NO
4 NC
5 C
6 NO
7 NC
8 C
9 NO
TB4
1 1
2 2
Modbus
®
TB3
1 +
2 +
3 -
4 -
5 A
6 A
7 B
8 B
9 S
10 S
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