AVT MAGIC TBR, Hardware And Software Manual

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INTERFACES
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4.2 TTL/Relay Interface
The TTL/Relay interface is realised as a 25-pin socket. It provides 8 programmable
TTL inputs or outputs and 8 relay contacts. The pin assignment of the socket is
shown in Table 2.
Table 2: TTL/Relay Interface
Pin Signal Electrical characteristics
1 TTL 1 input/output Socket (female): SUB-D 25-pin
TTL:
Maximum voltage: 3.3 V
Maximum current: 10 mA
Relay interface:
Maximum voltage: 48 V
Maximum current: 200 mA
2 TTL 2 input/output
3 TTL 3 input/output
4
TTL 4 input/output
5 TTL 5 input/output
6 TTL 6 input/output
7
TTL 7 input/output
8 TTL 8 input/output
9 RELAY 4 (B) output, NO
10 RELAY 5 (B) output, NO
11
RELAY 6 (B) output, NO
12 RELAY 7 (B) output, NO
13 RELAY 8 (B) output, NO
14
RELAY 1 (A) output, NO
15 RELAY 1 (B) output, NO
16 GND
17 RELAY 2 (A) output, NO
18 RELAY 2 (B) output, NO
19 RELAY 3 (A) output, NO
20 RELAY 3 (B) output, NO
21
RELAY 4 (A) output, NO
22 RELAY 5 (A) output, NO
23 RELAY 6 (A) output, NO
24
RELAY 7 (A) output, NO
25 RELAY 8 (A) output, NO
NO = Normally Open