ABB ACH480, Hardware Manual

Page: 100 / 214

￭ Additional information on the control connections
Connecting EIA-485 fieldbus cable to the drive
Connect the cable to the EIA-485 terminal on the RIIO-01 I/O & EIA-485 module, which
is attached to the drive. The connection diagram is shown below.
The EIA-485 network uses shielded, twisted-pair cable with a characteristic impedance
of 100 … 130 ohm for data signaling. The distributed capacitance between conductors
is less than 100 pF per meter (30 pF per foot). Distributed capacitance between
conductors and shield is less than 200 pF per meter (60 pF per foot). Foil or braided
shields are acceptable.
...
ON
1
ON
1
ON
1
B
+
A
-
DG
ND
ON
1
ON
1
ON
1
B
+
A
-
DG
ND
ON
1
ON
1
ON
1
B
+
A
-
DG
ND
1
2
1
2
1
2
3
4
Drive 1
Termination switch. Termination must be on at both ends on the fieldbus. For the drive, the
termination switch position is ON. 2
Fieldbus controller 3
Fieldbus 4
100 Electrical installation – North America