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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
1
Screen
2
Analogue output signal
3
Setpoint 1 output
4
Do not connect
5
Setpoint 5 output
6
Setpoint 4 output
7
Power 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
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.
