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2.5.
RS485 serial connection diagram
Up to 31 controllers (including different models) can be connected in parallel on the RS485 line. The line must end with a
resistor (120 Ω, 1/2 W).
Host computer
RS485
120
Frame ground (FG)
(*) f
or model
650-x-xxx-00031-x
650-x-xxx-00101-x
650-x-xxx-00201-x
Host computer
RS485
120
Frame ground (FG)
80208G_MHW_650-1250-1350_01-2017_ENG
Shield
B (+)
A (-)
19
20
21
22
Figure 13 - RS485 connection for 650 controller
Shield
B (+)
A (-)
45
46
+
47
-
48
Figure 14 - RS485 connection for 1250 and 1350 controllers
+
7
6
-
8
5
9
4
10
3
650
No. 1
28
4
27
3
26
2
25
1
1250 - 1350
No. 1
2. INSTALLATION
19
20
21
120
22
1/2 W
650
No. 31
45
28
46
27
+
47
26
-
48
25
120
1/2 W
1250 - 1350
No. 31
(*)
+
7
6
-
8
5
9
4
10
3
4
3
2
1
31
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