Ttl/Relay Interface - AVT MAGIC AE4 DAB/DAB+ 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
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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)
RELAY 7 (B)
12
13 RELAY 8 (B)
RELAY 1 (A)
14
15 RELAY 1 (B)
16 GND
17 RELAY 2 (A)
18 RELAY 2 (B)
19 RELAY 3 (A)
20 RELAY 3 (B)
RELAY 4 (A)
21
22 RELAY 5 (A)
RELAY 6 (A)
23
24 RELAY 7 (A)
25 RELAY 8 (A)
NO = normally open contact
NC = normally closed contact
Electrical characteristics
input/output TTL interface:
input/output Capacity of the TTL outputs:
Maximum voltage: 3.3V
input/output
Maximum current: 10mA
input/output
input/output
Relay interface:
input/output
Capacity of the relays:
input/output
Maximum voltage: 48V
input/output
Maximum current: 200mA
output, NO
output, NC
output, NC
output, NO
output, NO
output, NC
output, NC
output, NC
output, NC
output, NO
output, NO
output, NO
output, NC
output, NC
output, NO
output, NO
.
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