OSA Remote Specifications
Appendix C
10/11/18
Bedrock Secure OSA Remote User Manual - BRDOC020_001
C-4
•
counter mode (discrete input) where the OSA Remote accumulates
high-speed pulses up to 100 kHz
•
frequency mode (discrete input) where the OSA Remote provides
accurate frequency measurement from 10 Hz to 100 kHz
•
interface to NAMUR sensor for monitoring low-level current
•
0-10 V voltage input.
See Table C-3 for OSA Remote specifications that are specific to analog
operation.
The OSA Remote supports the following discrete input types:
•
voltage monitor
•
contact sense.
The following discrete output types are supported:
•
externally sourced discrete outputs
•
internally sourced discrete outputs.
Table C-3 OSA Remote Analog Specifications
Specification
Value
Loop Compliance Voltage
18 V DC minimum at 22 mA
Current Inputs Sense Resistor
250
Ω
, software selectable
Analog Output Load Resistance Minimum 250
Ω
Analog Output Load Resistance Maximum 750
Ω
4-20 mA Analog Input Current Accuracy
±0.03% of full-scale at 23°C
Analog Input Voltage Accuracy
±0.035% of full-scale at 23°C
Actual Input Range (current input)
3.25 mA - 22 mA
Actual Output Range (current output)
3.25 mA - 22 mA
Actual Input Range (voltage input)
0.1 V - 12 V
Voltage Input Impedance
20 k
Ω
Analog Output Accuracy
±0.035% of full-scale (between 4 mA and
20 mA) at 23°C
Excitation
Programmable:
Loop Voltage Mode: 21.6 V @ 22 mA
Temperature Coefficient
50 ppm/°C
Input Resolution
20 bits
Output Resolution
14 bits
Non-linearity
Included in accuracy
