West Control Solutions 8700+ - Manual (Page 38)

1 /
4
-DIN, 1 /
8
-DIN & 1 /
16
- DIN Controllers & Indicators - Product Manual
59305, Issue 7
– March 2014 Connections Page 33
11
12
RS485
B
A
RS485
A
B
16
17
18
COM
Option Slot A Connections - RS485 Serial Communications Module
If option slot A is fitted with the RS485 serial communication module, connections are as
illustrated. Carefully observe the polarity of the A (Rx/Tx +ve) and B (Rx/Tx -ve) connections.
1
/
16
DIN
1
/
4
DIN &
1
/
8
DIN
Figure 32. Option Slot A – RS485 Serial Communications Module
Option Slot A Connections - Digital Input Module
If a digital input module is fitted in option slot A, this may be connected to either voltage free
contacts (e.g. switch or relay), or a TTL compatible voltage. Connections are shown below.
1
/
16
DIN
1
/
4
DIN &
1
/
8
DIN
Figure 33. Option Slot A
– Digital Input Module
Option Slot A Connections
– Basic Auxiliary Input Module
If option slot A is fitted with a basic auxiliary input module, connect as shown. For
1
/
4
-DIN &
1
/
8
-DIN models it is recommend that the full auxiliary input (Option Slot B) is used instead, as
this has additional features and leaves option slot A free for other modules.
1
/
16
DIN
1
/
4
DIN &
1
/
8
DIN
Figure 34. Option Slot A – Basic Auxiliary Input Module
WARNING:
THIS MODULE MUST NOT BE FITTED IF FULL AUXILIARY INPUT IS FITTED IN OPTION
SLOT B.
16
17 _
+
11
12
+
_
16
17 _
+
11
12
+
_