A
3
2
1
3
2
1
B
e3
0b
i0
82
.1
0
A
Cable shield is connected directly to PE.
B
Cable shield is connected to PE through RC (factory default setting).
Illustration 26: The settings of the jumper X1 for OPTC8, Cable Shield Grounding, positions A, and B
A
3
2
1
3
2
1
B
e3
0b
i0
83
.1
0
A
Bus termination is ON.
B
Bus termination is OFF (factory default setting).
Illustration 27: The Settings of the Jumper X4, Bus Terminal Resistor, Positions A, and B
If setting the jumpers does not give the desired outcome, add biasing resistors, termination resistors or both. For biasing with
OPTC2, connect the resistors between pins 2 and 4 and between pins 3 and 5. For termination with OPTC2, connect the resistor
between pins 3 and 4.
1
2
3
4
5
C
A
B
D
E
F
G
e3
0b
i0
99
.1
0
A
A data +
B
B data -
C
N/A
D
VP
E
Minus
F
Plus
G
Data Ground
Illustration 28: The Fail-safe Biasing in OPTC2
1
2
3
4
5
C
A
B
D
E
F
G
e3
0b
i0
98
.1
0
AN338644703080en-0002 / DPD02156
46 | Danfoss A/S © 2022.08
RS485-based Option Boards
VACON® RS485 and CAN Bus Option Boards
Installation Guide
Summary of Contents for VACON OPTC2
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