G7 ASD Operation Manual
27
CNU1/1A and CNU2/2A Pinout
Note:
For normal operation, connect CNU1 to CNU1A or CNU2 to CNU2A. DO NOT
connect both. If both are connected, the TTL and RS232/
RS
485 signals will be
transferred simultaneously to and from the EOI and the control board resulting in a
Communications Lost error message or erratic ASD operation.
Note:
Connecting CNU1 to CNU2A will result in a continuous splash screen display.
Connect CNU1 to CNU1A and continue normally.
Connecting CNU2 to CNU1A will result in a continuous splash screen display.
Connect CNU2 to CNU2A and continue normally.
Note:
See the 7-Series Communications Manual (P/N 53840) for further information on the
G7 communications protocol and system configuration requirements.
CN3 Pinout‘
CN3 is used for RS232/RS485 serial communications.
Pin #
CNU1 Pinout
(Controller PCB)
CNU1A Pinout
(EOI)
Pin #
CNU2 Pinout
(Controller PCB)
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 Pin-7
7
Open
Open
8
Gnd
Gnd
8
Gnd
Gnd
Pin Number
CNU3 Pinout
(Controller PCB)
1
RS232/RS485
2
RS232/RS485 Signal -
3
RS232/RS485 Signal Gnd
4
Shield