26
WX9 ASD Installation and Operation Manual
CNU1/1A and CNU2/2A Pinout
Table 3. CNU1/1A and CNU2/2A pinout assignments.
Note:
For normal operation, connect CNU1 to CNU1A. Connecting CNU1 to CNU2A will
result in a failed communications condition indicated by a continuous splash screen
display. Connect CNU1 to CNU1A and continue normally.
See the 7-Series Communications Manual (P/N 53840) for more information on the
WX9 ASD
communications protocol and system configuration requirements.
CN3 Pinout
CN3
is used for RS232/RS485 serial communications.
Pin #
CNU1 Pinout
(Control Board)
CNU1A Pinout
(EOI)
Pin #
CNU2 Pinout
(Control Board)
CNU2A Pinout
(EOI)
1
P24
P24
1
P24
P24
2
Gnd
Gnd
2
Gnd
Gnd
3
Tx (-)
RXA
3
Rx
Tx
4
Rx (+)
TXA
4
Gnd
Gnd
5
Rx (-)
TXB
5
Tx
Rx
6
Tx (+)
RXB
6
Gnd
Gnd
7
RS232/RS485
CNU3
7
Open
Open
8
Gnd
Gnd
8
Gnd
Gnd
Table 4. CN3 pinout assignments.
Pin Number
CNU3 Pinout
(Control Board)
1
RS232/RS485
2
RS232/RS485 Signal -
3
RS232/RS485 Signal Gnd
4
Shield
WARNING
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