Ttl/Relay Interface - AVT MAGIC AE4 Hardware Manual

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3.2

TTL/Relay interface

The TTL / Relay interface is realised as a 25-pin socket. It provides 8 TTL in- puts or
outputs and 8 Relay contacts. The pin assignment of the socket is shown below
Table: TTL/Relay interface
Pin Signal
1
1 TTL 1
2 TTL 2
3 TTL 3
4 TTL 4
5 TTL 5
6 TTL 6
7 TTL 7
8 TTL 8
9 RELAY 4 (B)
10 RELAY 5 (B)
11
RELAY 6 (B)
12 RELAY 7 (B)
13
RELAY 8 (B)
14 RELAY 1 (A)
15 RELAY 1 (B)
16 GND
17 RELAY 2 (A)
18 RELAY 2 (B)
19 RELAY 3 (A)
20 RELAY 3 (B)
21 RELAY 4 (A)
22
RELAY 5 (A)
23 RELAY 6 (A)
24
RELAY 7 (A)
25 RELAY 8 (A)
Direction Electrical characteristics
input/output TTL interface:
input/output
Capacity of the TTL outputs:
input/output
Maximum voltage: 3.3V
Maximum current: 10mA
input/output
input/output
input/output
Relay interface:
input/output
Capacity of the relays:
input/output
Maximum voltage: 48V
Maximum current: 200mA
output, NO
output, NO
output, NO
NO = normally open
output, NO
output, NO
output, NO
output, NO
output, NO
output, NO
output, NO
output, NO
output, NO
output, NO
output, NO
output, NO
output, NO
.
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