ABB ACS480 - Additional Information on the Control Connections; Connecting EIA-485 Fieldbus Cable to the Drive; Connection Examples of Two-Wire and Three-Wire Sensors

￭ 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 for data signaling with characteristic
impedance between 100 and 130 ohm. 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 -
DGND
ON
1
ON
1
ON
1
B +
A -
DGND
ON
1
ON
1
ON
1
B +
A -
DGND
1
2
1
2
1
2
3
4
Drive1
Termination switch. Termination must be on at both ends on the fieldbus. For the drive, the
termination switch position is ON.
2
Fieldbus controller3
Fieldbus4
Connection examples of two-wire and three-wire sensors
The figures give examples of connections for a two-wire or three-wire sensor/transmitter
that is supplied by the auxiliary voltage output of the drive.
80 Electrical installation – North America