JLCooper Gangway16 - Manual (Page 9)

9
Technical Reference
Serial Port Interface
The pinout of the serial ports is listed in the table below.
Pin Slave Devices Controller
1 Ground Ground
2 Receive A Transmit A
3 Transmit B Receive B
4 Ground Ground
5 Not connected Not connected
6 Ground Ground
7 Receive B Transmit B
8 Transmit A Receive A
9 Ground Ground
RS-422 Pinout
GPI Input
The Gangway16 has 16 General Purpose Interface inputs and 16
General Purpose Interface outputs.
The inputs can be used to sense external signals such as tallies and
alarms. These pins are a CMOS input. The input signal must be
limited to between 0 and 5 volts referenced to ground. This input
is pulled up to +5 volts with an internal pullup resistor. This
makes it compatible with dry relay contacts, optoisolators and open
collector outputs.
The outputs can be used to trigger external devices such as
indicators and alarms. These pins are a CMOS outputs. The
outputs must be limited to between 0 and 5 volts referenced to
ground.
The pinout of the GPI ports is listed in the table on the following
page.