ABB RMC-100, User Manual

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2105552MNAE | RMC-100 | 21
Electrical specification
(each point)
Description Value
converter, ADC) resolution for the input
AI input protection Vtvs
Each AI input has TVS protection, typical V threshold
level to begin conducting.
32 Vdc typical
2.2.3.2 Analog output
The RMC provides a single (1) analog output. The AO has a voltage-sourcing diode input voltage pin, a
current sinking pin, a current sourcing pin, and a ground pin. The AO can provide 4-20 mA output
through the sink and source pins. Calibrate the AO from the user interface. For specific pinout
information, see section 3.5.5.2 Analog output pinouts . Table 2-7 provides the analog output
specifications.
Table 2-7: Analog output specifications
Electrical
specification
(each point)
Description Value
AO output current
Current that the sinking and sourcing pins can
drive
0 – 24 mA dc
AO sink to source
resistance
Resistance in the loop on the RMC 154 Ω
AO voltage sourcing
(Vaosrc)
Voltage provided at Pin 1
V input to RMC – 0.6 V
(typical)
AO current sourcing
(Iaosrc)
Current range provided at Pin 1 0-24 mA dc
AO output resolution
Digital to analog converter (Digital to analog
converter, DAC) resolution for the output
16-bit resolution
AO output protection
(Vtvs)
Each AO has onboard TVS protection, typical V
threshold level to begin conducting.
32 Vdc typical
2.2.3.3 Pulse input
The RMC provides two pulse inputs (Pulse input, PI). Each PI can accept a variety of input types: 0-5
Vdc TTL input, Open-Collector (Open-Collector, OC), Open-Drain (Open-Drain, OD), or dry switch type
contact. A Schmidt Trigger type gate provides input hysteresis for improved noise protection. Each PI
has a debounce filter configurable from the user interface. For specific pinout information, see section
3.5.5.3 Pulse input pinouts . Table 2-8 : Pulse input specifications provides the pulse input
specifications.
Table 2-8: Pulse input specifications
Electrical specification
(each point)
Description Value
PI open circuit Voc PI open circuit voltage 5 Vdc
PI pull up resistance 10 kΩ nominal through a diode to input 10 kΩ
PI input capacitance in
low pass filter mode
Capacitance to ground applied to input gate 0.1 µF
PI input frequency range
with debounce enabled
Frequency range of input (50% duty cycle, OC) 0-550 Hz
PI input frequency range
with debounce disabled
Frequency range of input (50% duty cycle, OC) 0-20 kHz
PI Vhighmin High input detection voltage threshold minimum 2.4 Vdc (TTL level)
PI Vlowmax Low input detection voltage threshold maximum 0.8 Vdc (TTL level)
PI supported inputs PI supports: open collector, open drain, dry
switch, 5 V TTL type inputs
Not applicable
2.2.3.4 Digital input and output
The six (6) RMC DI/DO support the configurable input or output modes of operation.
The digital input mode handles up to 30 Vdc. The configurable built-in pull-up resistor reads signals
from devices with dry contact and open collector/drain output types.
The digital output mode provides a MOSFET open drain (OD) type output that sinks up to 2 Adc
current.