Honeywell UDC3300 - Figure 2-9 RS422;485 Communications Option Connections

1/01 UDC3300 Limit Controller Product Manual 17
2.5 Wiring Diagrams, Continued
Communications
option connections
There are two types of Communications option available:
• RS422/485—Figure 2-9
• DMCS—Figure 2-10.
Figure 2-9 shows the wiring connections for the RS422/485
Communications Option.
Figure 2-9 RS422/485 Communications Option Connections
12
13
14
15
16
17
L1
L2/N
22
23
24
25
26
27
Master
TX+
SHD
TX–
RX+
RX–
Do not mix half and full duplex wiring.
Do not run these
lines in the same
conduit as AC power
CAUTION
12
13
14
15
16
17
L1
L2/N
22
23
24
25
26
27
Master
TX–/RX–
SHD
TX+/RX+
Do not run these
lines in the same
conduit as AC power
RS422/485
HALF DUPLEX
To Other
Communication
Instruments
(maximum 15)
SHD
TX+/RX+
TX–/RX–
RS422/485
FULL DUPLEX
RX+
SHD
RX–
TX+
TX–
120 Ohm
Resistor
To Other
Communication
Instruments
(maximum 15)
120 Ohm Resistor
on Last Leg
120 Ohm
Resistor
120 Ohm
Resistor
120 Ohm Resistor
on Last Leg
22621
1
1
1
Use shielded twisted pair cables
(Belden 9271 Twinax or equivalent)
Continued on next page