Installation guide

VAR4 / VAR12 / VAR20 - Product Description
6.3.3 Control Port 1 (Expand Unit)
Expand unit Control Port 1 implements opto-isolated contacts on a 25-way female D connector.
The contact numbers in brackets refer to the upper expand unit (VAR20 only). The contacts numbers without
brackets refer to the lower expand units (VAR12 and VAR20)
Figure 18 Expand Unit Control Port 1
FEMALE
10
9
8 7 613 12 11
18 17 16 15 1423
22
21 20 1925 24
5 4 3 2 1
CONTACT 24
(CONTACT 44)
- +
- +
CONTACT 23
(CONTACT 43)
- +
CONTACT 25
(CONTACT 45)
CONTACT 26
(CONTACT 46)
- +
CONTACT 28
(CONTACT 48)
- +
CONTACT 30
(CONTACT 50)
- +
- +
CONTACT 27
(CONTACT 47)
- +
CONTACT 29
(CONTACT 49)
- +
CONTACT 31
(CONTACT 51)
Pin No. Signal Description
1 CONTACT 23 (CONTACT 43) + Opto-isolated Contact 23(43) +VE
2 CONTACT 24 (CONTACT 44) + Opto-isolated Contact 24(44) +VE
3 CONTACT 25 (CONTACT 45) + Opto-isolated Contact 25(45) +VE
4 CONTACT 26 (CONTACT 46) + Opto-isolated Contact 26(46) +VE
5 CONTACT 27 (CONTACT 47) + Opto-isolated Contact 27(47) +VE
6 CONTACT 28 (CONTACT 48) + Opto-isolated Contact 28(48) +VE
7 CONTACT 29 (CONTACT 49) + Opto-isolated Contact 29(49) +VE
8 CONTACT 30 (CONTACT 50) + Opto-isolated Contact 30(50) +VE
9 CONTACT 31 (CONTACT 51) + Opto-isolated Contact 31(51) +VE
10 Not Connected
11 Not Connected
12 Not Connected
13 Not Connected
14 CONTACT 23 (CONTACT 43) - Opto-isolated Contact 23(43) -VE
15 CONTACT 24 (CONTACT 44) - Opto-isolated Contact 24(44) -VE
16 CONTACT 25 (CONTACT 45) - Opto-isolated Contact 25(45) -VE
17 CONTACT 26 (CONTACT 46) - Opto-isolated Contact 26(46) -VE
18 CONTACT 27 (CONTACT 47) - Opto-isolated Contact 27(47) -VE
19 CONTACT 28 (CONTACT 48) - Opto-isolated Contact 28(48) -VE
20 CONTACT 29 (CONTACT 49) - Opto-isolated Contact 29(49) -VE
21 CONTACT 30 (CONTACT 50) - Opto-isolated Contact 30(50) -VE
22 CONTACT 31 (CONTACT 51) - Opto-isolated Contact 31(51) -VE
23 Not Connected
24 Not Connected
25 Not Connected
Issue: 03 complete, approved
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