ABB RMC-100 - Analog Input Configuration

20 | RMC-100| 2105552MNAE
Figure 2-8: Inputs and outputs
Legend for Figure 2-8: Inputs and outputs
ID
Port name
Terminal type
1 PI
Removable terminal connector (4 POS), screw termination. Wire gauge 12
AWG to 22 AWG.
2 AO
Removable terminal connector (4 POS), screw termination. Wire gauge 12
AWG to 22 AWG.
3 AI
Removable terminal connector (12 POS), screw termination. Wire gauge 12
AWG to 22 AWG.
4 DI/DO
Removable terminal connector (12 POS), screw termination. Wire gauge 12
AWG to 22 AWG.
2.2.3.1 Analog input
The RMC provides four analog inputs. Each port consists of a power source input pin, input signal pin,
and input ground pin. For specific pinout information, see section 3.5.5.1 Analog input pinouts
.
Each of the four analog inputs (AI) consists of an analog input point capable of handling voltage or
current inputs. The voltage range is 0-30 Vdc. The current range is 4-20 mA.
Table 2-6
provides the analog input specifications.
Table 2-6: Analog input specifications
Electrical specification
(each point)
Description Value
AI mode
Each AI point supports voltage or current mode
operation, configurable from the user interface.
Voltage /
Current
AI input voltage
Input voltage range
0 – 30 Vdc
AI input current
Input current range when configured for current
mode
0 – 20 mA
AI input impedance
(voltage mode)
Resistance to ground on AI in voltage mode 90 kΩ typical
AI input impedance
(current mode)
Resistance to ground on AI in current mode 255 Ω typical
AI current source max
Isrc
A current limited voltage-sourcing pin provides a
sourcing loop current for 4-20 mA current loops.
25 mA dc max
AI resolution
Analog to digital converter (Analog to digital
24 bits
3 24
1