C
omrex
C
orporation
12
P
InoutS
- c
ontAct
c
loSure
P
InoutS
- S
erIAl
P
ort
Contact closures are available via the male 9-pin D connector on the back
of the ACCESS Rack. Inputs are triggered by shorting the respective input
to
Pin 5
. Outputs consist of an
open collector
circuit which, when inac-
tive, will offer a high-impedance path to
Pin 5
and, when active, will offer
a low impedance path to
Pin 5
. These outputs are capable of sinking up to
200mA at a voltage up to 12V. Do not switch AC mains power using these
contacts.
Table 3 - Contact Closure Pinouts
Pin 1
Input #1
Pin 2
Input #2
Pin 3
Input #3
Pin 4
Input #4
Pin 5
Ground
Pin 6
Output #1
Pin 7
Output #2
Pin 8
Output #3
Pin 9
Output #4
The
Serial Port
is capable of transferring ancillary data to the far end of
the connection. By default, the communication parameters are set for
9600bps, no handshaking, no parity, 8 data bits, one stop bit (9600,n,8,1).
It is pinned on a 9-pin D female in DCE-style pinning. The port is designed
to connect to a 9-pin PC serial port with a straight-through M-F cable.
RS-232 levels are used.
Table 4 - Serial Port Pinouts
Pin #
Function
Direction
1
CD
Unused
2
RX Data
From ACCESS
3
TX Data
To ACCESS
4
DTR
To ACCESS
5
Ground
6
DSR
From ACCESS
7
RTS
To ACCESS
8
CTS
From ACCESS
9
RI
Unused
