D397-01-880 Issue E
Page 6
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Technical data
2.4.3
Serial communications
Figure 3 - Pin connections for a 9-way sub-miniature 'D' type socket
Connector type
9-way sub-miniature 'D' type socket (refer to
)
RS232 transmit
Mark
< - 8 V (I
out
max: -8 mA)
Space
> +8 V (I
out
max: +8 mA)
RS232 receive
Mark
< +1.0 V (I
in
max: -2.0 mA)
Space
>+2.0 V (I
in
max: +2.0 mA)
Maximum input
±
12 V
RS232 protocol
9600 baud, 1 stop bit, 8 data bits, no parity
RS485
Output differential
>1.5 V (I
out
max:
±
25 mA)
Input differential threshold
>
±
0.2 V (I
in
max:
±
1 mA)
Maximum input
-7.0 V to +12 V
Bus load
The TIC applies one unit load to the RS485 bus.
Table 4 - Serial communications connector pin-out
Pin
Allocation
1
N/C
2
RS232 transmit
3
RS232 receive
4
N/C
5
RS232 common
6
N/C
7
N/C
8
RS485 data A
9
RS485 data B
