15
3.3
TTL/Relay interface
The TTL/relay interface is realised as a 25-pin socket. It provides six TTL
inputs/outputs as well as six relay contacts, which offer the NC and the NO
function.
Pin assignment: TTL/Relay interface
Socket: SUB-D 25-pin
Pin Signal
Electrical characteristics
1
GND
TTL interface:
Maximum voltage: 3,3 V
Maximum current: 10 mA
Relay interface:
Maximum voltage: 48 V
Maximum current: 200 mA
2
TTL 1
input/output
3
TTL 2
input/output
4
TTL 3
input/output
5
RELAY 1 (COMMON)
6
RELAY 2 (NC)
7
RELAY 2 (NO)
8
RELAY 3 (COMMON)
9
RELAY 4 (NC)
10
RELAY 4 (NO)
11
RELAY 5 (COMMON)
12
RELAY 6 (NC)
13
RELAY 6 (NO)
14
TTL 4
input/output
15
TTL 5
input/output
16
TTL 6
input/output
17
RELAY 1 (NC)
18
RELAY 1 (NO)
19
RELAY 2 (COMMON)
20
RELAY 3 (NC)
21
RELAY 3 (NO)
22
RELAY 4 (COMMON)
23
RELAY 5 (NC)
24
RELAY 5 (NO)
25
RELAY 6 (COMMON)
NO = normally closed contact
NC = normally open contact
