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Technical data
D397-21-880 Issue G
2.4.3 Serial communications
Table 3 - Logic interface connector pin-out
Pin Allocation
1Screen
2 Analogue output signal
3 Setpoint 1 output
4 Do not connect
5 Setpoint 5 output
6 Setpoint 4 output
7Power supply common
8 Do not connect
9 Gauge 1 enable input
10 Power supply common
11 Power supply positive
12 Power supply common
13 Power supply common
14 Analogue output common
15 Setpoint 2 output
16 Setpoint 3 output
17 Do not connect
18 Alarm output
19 Setpoint 6 output
20 Gauge 2 enable input
21 Gauge 3 enable input
22 Do not connect
23 Do not connect
24 Do not connect
25 System interlock input (SYSI)
Connector type 9-way sub-miniature 'D' type socket (refer to Figure 3)
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.
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