RS 485 Modbus I/O Server 8AI, 2AO, Modbus/TCP, SNMP, Active I/O Messaging

Mfg Part Number:  ioLogik R2140  
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Linking Input and Output Signals over RS-485
The ioLogik R2000 series was designed for system integrators to acquire and control remote digital and analog devices over RS-485. Types of digital on/off devices include proximity switches, mechanical switches, push buttons, optical sensors, LEDs, and light switches. Types of analog devices include pH, conductivity, temperature, humidity, pressure, flow, actuator, and valves.The ioLogik R2000 series of servers can work with the standard Modbus protocol. SCADA software or the MXIO DLL library may be used to access the server.

Full Range of DI/O and AI/O Models
RS-485 is the most popular wiring standard for many industries. Now, Moxa offers a high quality line of remote I/O server with the RS-485 interface and upgraded functions.

  • Multi-functional digital I/O with DI/Event Counter and DO/Pulse Output modes
  • Multi-function analog I/O with mA/mV/Voltage modes
  • Over-current and over-voltage protection
  • PLC-grade I/O design that ensures accuracy and reliability during field operation
  • Remote management of firmware upgrades over RS-485 network

Independent Configuration of Multi-Functional DI/DO and AI/AO Channels
Each input signal can be independently configured, with DI/Event Counter modes available for digital inputs and voltage/current modes available for analog inputs. Each digital output can be independently configured for DO or Pulse Output mode. The analog input channels support various signals ranging from +/-150 mV to +/-10V at 16-bit resolution. The analog output channels support 0 to 20 mA and 4 to 20 mA @ 12-bit resolution.

8-channel analog input for mV, voltage, current signal with wire-off detection (at 4 to 20 mA)
2-channel analog output for voltage, current actuator control
16-bit resolution analog input, 12-bit resolution analog output
Easy-to-use, quick programming lib for VB, VC++, BCB
NIST-Traceability calibration for analog I/O channels

RS-485 (2-wire): Data+, Data-, GND
Serial Line Protection
15 KV ESD for all signals
Serial Communication Parameters
Data bits
Stop bits
Flow control
9600 bps to 115200 bps
Built-in RTC
Power Requirements
Power input
24 VDC nominal, 12 to 48 VDC
Power consumption
195 mA @ 24 VDC (typ.)
Field power
24 VDC nominal, up to 36 VDC
Mechanical Specifications
I/O cable max. 14 AWG
Operating temperature
-10 to 60°C (14 to 140°F), 5 to 95% RH
Storage temperature
-40 to 85°C (-40 to 185°F), 5 to 95%RH
Analog Input
Input range
+/-150 mV, +/-500 mV, +/-5 V, +/-10 V, 0 to 20 mA, 4 to 20 mA
Data format
16-bit integer
+/- 0.1%, FSR @ 25°C, +/- 0.3%, FSR @ 0, 60ºC
Optical isolation
Sampling rate
10 samples/sec (voltage), 6 samples/sec (current)
Built-in resistor for current input
125 Ohm
Can withstand continuous overvoltage (protection range-10V to 10V)
Analog Output
Output range
0 to 10V, 4 to 20 mA
Drive voltage
15 VDC for current output
+/- 0.1%, FSR @ 25C, +/- 0.3%, FSR @ 0, 60ºC (current)
+/- 0.2%, FSR @ 25C, +/- 0.4%, FSR @ 0, 60ºC (voltage)
CMR @ 50/60 Hz
95 dB min.
Zero drift
+/- 9?V/ºC
Span drift
+/- 25 ppm/ºC
Load resistor
< 250 Ohm
Agency Approvals
FCC Part 15, CISPR (EN55022) Class A
IEC61000-4-2 (ESD), level 2/3
IEC61000-4-3 (RS), level 2
IEC61000-4-4 (EFT), level 2
IEC61000-4-5 (Surge), level 3
IEC61000-4-6 (CS), level 2
IEC61000-4-8 (PM), level 1
IEC61000-4-11 (Dip)
UL 508
2 years


Power Requirements
Power Consumption 170 mA @ 24 VDC
Power Input 24 VDC nominal, 12 to 48 VDC
Serial Communication Parameters
Flow Control None
Protocol Modbus/RTU
Data Bits 8
Parity None
Stop Bits 1
Baudrate 1200 to 115200 bps
Analog Input
Isolation 3K VDC or 2K Vrms
Built-in Resistor for Current Input 106 ohms
Resolution 16 bits
Input Range ±150 mV, ±500 mV, ±5 V, ±10 V, 0 to 20 mA, 4 to 20 mA
Sampling Rate (all channels) 10 samples/sec (voltage) 6 samples/sec (current)
Accuracy ±0.1% FSR @ 25°C ±0.3% FSR @ -10 and 60°C
I/O Mode Voltage / Current
Inputs and Outputs
Analog Outputs 2 channels
Analog Inputs 8 channels
Analog Output
Resolution 12 bits
Drive Voltage 15 VDC for current output
Accuracy ±0.1% FSR @ 25°C ±0.3% FSR @ -10 and 60°C
Output Range 0 to 10 V, 4 to 20 mA
Load Resistor Less than 250 ohms
Environmental Limits
Operating Temperature -10 to 60°C (14 to 140°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
MTBF (mean time between failures)
Time 280,923 hrs
Database Telcordia (Bellcore)
Physical Characteristics
Weight 200 g
Dimensions 115 x 79 x 45.6 mm (4.53 x 3.11 x 1.80 in)
Wiring I/O cable max. 14 AWG
Standards and Certifications
EMI FCC Part 15 Subpart B Class A, EN 55022 Class A
Safety UL 508
Shock IEC 60068-2-27
Vibration IEC 60068-2-6
EMS IEC 61000-4, IEC 61000-6
Freefall IEC 60068-2-32
Serial Communication
Interface RS-485-2w: Data+, Data-, GND
Serial Line Protection 15 KV ESD for all signals
Warranty Period 5 years
Details See

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