ABB AI830A DCS programming analog input unit
External +24 V DC power supply for the RMIO board is recommended if• the application requires a fast start after connecting the input power supply
• fieldbus communication is required when the input power supply is disconnected.
The RMIO board can be supplied from an external power source via terminal X23 or
X34 or via both X23 and X34. The internal power supply to terminal X34 can be left
connected when using terminal X23.
WARNING! If the RMIO board is supplied from an external power source via
terminal X34, the loose end of the cable removed from the RMIO board terminal
must be secured mechanically to a location where it cannot come into contact with
electrical parts. If the screw terminal plug of the cable is removed, the wire ends
must be individually insulated.
Parameter settings
In Standard Control Program, set parameter 16.9 CTRL BOARD SUPPLY to
EXTERNAL 24V if the RMIO board is powered from an external supply
External control connections (non-US)
External control cable connections to the RMIO board for the ACS800 Standard
Control Program (Factory Macro) are shown below. For external control connections
of other control macros and programs, see the appropriate firmware manual.
X2* RMIO
X20 X20
1 1 VREF- Reference voltage -10 VDC, 1 kohm < RL <
2 2 AGND 10 kohm
X21 X21
1 1 VREF+ Reference voltage 10 VDC, 1 kohm < RL <
10 kohm 2 2 AGND
3 3 AI1+ Speed reference 0(2) ... 10 V, Rin =
200 kohm 4 4 AI1-
5 5 AI2+ By default, not in use. 0(4) ... 20 mA, Rin =
100 ohm 6 6 AI2-
7 7 AI3+ By default, not in use. 0(4) ... 20 mA, Rin =
100 ohm 8 8 AI3-
9 9 AO1+ Motor speed 0(4)...20 mA 0...motor nom.
speed, RL < 700 ohm 10 10 AO1-
11 11 AO2+ Output current 0(4)...20 mA 0...motor
nom. current, RL < 700 ohm 12 12 AO2-
X22 X22
1 1 DI1 Stop/Start
2 2 DI2 Forward/Reverse 1)
3 3 DI3 Not in use
4 4 DI4 Acceleration & deceleration select 2)
5 5 DI5 Constant speed select 3)
6 6 DI6 Constant speed select 3)
7 7 +24VD +24 V DC max. 100 mA
8 8 +24VD
9 9 DGND1 Digital ground
10 10 DGND2 Digital ground
11 11 DIIL Start interlock (0 = stop) 4)
X23 X23
1 1 +24V Auxiliary voltage output and input, non isolated, 24 V DC 250 mA 5) 2 2 GND
X25 X25
1 1 RO1 Relay output 1: ready
2 2 RO1
3 3 RO1
X26 X26
1 1 RO2 Relay output 2: running
2 2 RO2
3 3 RO2
X27 X27
1 1 RO3 Relay output 3: fault (-1)
2 2 RO3
3 3 RO3

External control connections (US)
External control cable connections to the RMIO board for the ACS800 Standard
Control Program (Factory Macro US version) are shown below. For external control
connections of other control macros and programs, see the appropriate firmware
manual.
X2* RMIO
X20 X20
1 1 VREF- Reference voltage -10 VDC, 1 kohm < RL <
2 2 AGND 10 kohm
X21 X21
1 1 VREF+ Reference voltage 10 VDC, 1 kohm < RL <
10 kohm 2 2 AGND
3 3 AI1+ Speed reference 0(2) ... 10 V, Rin =
200 kohm 4 4 AI1-
5 5 AI2+ By default, not in use. 0(4) ... 20 mA, Rin =
100 ohm 6 6 AI2-
7 7 AI3+ By default, not in use. 0(4) ... 20 mA, Rin =
100 ohm 8 8 AI3-
9 9 AO1+ Motor speed 0(4)...20 mA 0...motor nom.
speed, RL < 700 ohm 10 10 AO1-
11 11 AO2+ Output current 0(4)...20 mA 0...motor
nom. current, RL < 700 ohm 12 12 AO2-
X22 X22
1 1 DI1 Start ( )
2 2 DI2 Stop ( )
3 3 DI3 Forward/Reverse 1)
4 4 DI4 Acceleration & deceleration select 2)
5 5 DI5 Constant speed select 3)
6 6 DI6 Constant speed select 3)
7 7 +24VD +24 VDC max. 100 mA
8 8 +24VD
9 9 DGND1 Digital ground
10 10 DGND2 Digital ground
11 11 DIIL Start interlock (0 = stop) 4)
X23 X23
1 1 +24V Auxiliary voltage output and input, non isolated, 24 VDC 250 mA 5) 2 2 GND
X25 X25
1 1 RO1 Relay output 1: ready
2 2 RO1
3 3 RO1
X26 X26
1 1 RO2 Relay output 2: running
2 2 RO2
3 3 RO2
X27 X27
1 1 RO3 Relay output 3: fault (-1)
2 2 RO3
3 3 RO3
Fault
A
rpm
RMIO
Terminal block size:
cables 0.3 to 2.5 mm2 (22 to 14 AWG)
Tightening torque:
0.2 to 0.4 Nm (0.2 to 0.3 lbf ft)
* optional terminal block in ACS800-U2
and ACS800-U7
1) Only effective if par. 10.03 is set to
REQUEST by the user.
2) 0 = open, 1 = closed
3) See par. group 12 CONSTANT
SPEEDS.
4) See parameter 21.09 START INTRL
FUNC.
5) Total maximum current shared
between this output and optional
modules installed on the board.