27.
TRO
UBLESHO
OTIN
G
J401
channel 0 is wired to the upper terminals whereas channel 2 RS485/RS232 is wired to the
lower terminals.
*NOTE:
J300 is shared with Compac Comms. Therefore, a site with Compac comms cannot use
this RS485 channel.
Tank Gauge comms
Use J400 for 4-20mA tank gauge connections. Up to two tank gauges can be connected to J400.
LEDs
LED
Colours
Comment
Pump Com's (NZ)
Yellow, Green, Red
Toggles Yellow / Green = Normal
Red = Comm's short
Pump Com's (Aus)
Green, Red
Toggles Red Green = Normal
ATG (NZ)
Green, Red
Toggles Red Green = Normal
ATC (Aus)
Green, Red
Toggles Red Green = Normal
COMMS/terminal
block
SW400 SW401 Channel
Terminal
RS485 on J300
*Note
N/A
N/A
0
GND RS485-A
RS485-B
RS485 on J401
OFF
OFF
2
GND RS485-D
RS485-E
RS485 on J401 with
a terminator
OFF
ON
2
GND RS485-D
RS485-E
RS232 on J401
ON
OFF
2
GND RS232-E (Txd) RS232-F (Rxd)