ABB AI810 DCS programming analog input unit
Connect the control cables as described below. Connect the conductors to the
appropriate detachable terminals of the RMIO board [refer to chapter Motor control
and I/O board (RMIO)]. Tighten the screws to secure the connection. Make a 360
degrees EMC grounding at the cabinet entry in first environment installations. First
environment EMC compliance is defined in Technical data: Compliance with EN
61800-3:2004.
Connecting the shield wires at the RMIO board
Single-shielded cable: Twist the grounding wires of the outer shield and connect
them to the nearest grounding clamp. Double-shielded cable: Connect the inner
shields and the grounding wires of the outer shield to the nearest grounding clamp.
Do not connect shields of different cables to the same grounding clamp.
Leave the other end of the shield unconnected or ground it indirectly via a few
nanofarads high-frequency capacitor (e.g. 3.3 nF / 630 V). The shield can also be
grounded directly at both ends if they are in the same ground line with no significant
voltage drop between the end points.
Keep the signal wire pairs twisted as close to the terminals as possible. Twisting the
wire with its return wire reduces disturbances caused by inductive coupling.
Securing the control cables mechanically
Use strain relief clamps as shown above. Fasten the control cables to the cabinet
frame.

The voltage transformer of the cooling fan is located at the top right-hand corner of
the drive module. Remove the front cover for adjusting the settings and replace the
cover after setting.
Installation of optional modules
The optional module (such as a fieldbus adapter, an I/O extension module and the
pulse encoder interface) is inserted in the optional module slot of the RMIO board in
the RDCU control unit and fixed with two screws. See the appropriate optional
module manual for the cable connections.
Cabling of I/O and fieldbus modules
Set according to the supply voltage:
380 V, 400 V, 415 V, 440 V, 480 V or 500 V; or
525 V, 575 V, 600 V, 660 V or 690 V.
Note: No need to set for 230 V units.
Set to 220 V if the supply frequency is 60 Hz. Set to
230 V if the supply frequency is 50 Hz.
Note1: If the encoder is of unisolated
type, ground the encoder cable at the
drive end only. If the encoder is
galvanically isolated from the motor
shaft and the stator frame, ground the
encoder cable shield at the drive and
the encoder end.
Note 2: Twist the pair cable wires.
Note 3: The grounding wire of the outer
shield of the cable can alternatively be
connected to the SHLD terminal of the
RTAC module.