MCM280X-20AD

Analog and digital I/O Modbus TCP
  • Features
    • Modbus TCP I/O module
    • Modbus TCP remote I/O
    • Ethernet I/O module with analog inputs
    • RS485 Modbus RTU extention
    • Thermocouple Inputs
    • 4-20mA Inputs
    • 0-10V Inputs
    • RTD Inputs
    • Potentiometer Inputs
    • 4-20mA Output
    • 0-10V Output
    • 16 Digital Inputs or Outputs



Modbus TCP to Analog and Digital IO

Modbus TCP to Analog and Digital IO infographics

Unlock Enhanced Control and Connectivity with the MCM260X-9AD Analog and Digital Converter.

The MCM280X Modbus TCP Analog and Digital I/O module is a powerful and compact DIN rail–mounted solution designed for industrial automation systems requiring flexible data acquisition and control. Housed in a robust DIN43880 enclosure (9 modules wide), the unit combines analog, digital, and high-speed counting capabilities into a single device, making it ideal for PLC integration, remote monitoring, and distributed I/O applications.

Equipped with Modbus TCP/IP over Ethernet (10/100 Mbps), the MCM280X ensures fast and reliable communication with SCADA systems, PLCs, and industrial networks. In addition, the integrated RS485 Modbus RTU port allows seamless expansion of the system by connecting up to 32 additional modules in bridge mode, effectively extending I/O capacity without increasing network complexity.

The module features 4 high-resolution (16-bit) analog inputs, supporting a wide range of signals including thermocouples (K, S, R, J, T, E, N, B), RTDs (PT100, PT1000, Ni100), mA, voltage, millivolt, and potentiometer inputs. This flexibility makes it suitable for temperature, process, and position measurement in diverse industrial environments. Complementing this are 2 analog outputs, selectable as 4–20 mA or 0–10 V, providing precise control signals for actuators and control loops.

On the digital side, the MCM280X includes 16 digital inputs (8 standard PNP inputs and 8 multifunction channels configurable as inputs or outputs) and 8 static PNP digital outputs with up to 700 mA per channel maximum 2 Amps total. Additionally, 4 high-speed 32-bit encoder/counter inputs (up to 100 kHz) enable accurate pulse counting and motion monitoring applications.

Powered by a 12–24 VDC supply, the unit is designed for industrial environments with operating temperatures from 0 to 45°C. Configuration is simple via Modbus registers or the intuitive MyPixsysLab software, ensuring quick setup and integration.

MCM260X-9AD Specifications

Analog Input
Thermocouples K, S, R, J, T, E, N, and B type
Current 0-20mA , 4-20mA.
Voltage 0-1Volt, 0-10Volt, 0-5Volts.
RTD's Pt100, Pt500, Pt1000, 500Ni.
Thermistors PTC, NTC
Potentiometer 1-150 K Ohm.
Analog Output
Current 4-20mA
Voltage 0-10Volts
Digital Input
8 PNP inputs 12-24Vdc On above 8.2Vdc, Off below 8.2Vdc
Digital Output
8 static outputs 12-24Vdc Max 700mA per output Max 2A total
Multifunction digital channels
8 PNP inputs 12-24Vdc On above 8.2Vdc, Off below 8.2Vdc
8 static outputs 12-24Vdc Max 700mA per output Max 2A total
PWM output
2 Outputs, 12-24Vdc Max: 20mA Max freq.: 200kHz
Power Supply 12...24Vac/Vdc.
Power Consumption 100VA max.
Temperature Range Operative-32°F +113°F -0°C +45°C
Humidity (non condensing) 35-95%.
Housing DIN Rail
Dimensions 3.5" x 2.8" x 2.3",                162 x 90 x 58 mm
Weight 14 oz 380 g
EMC For industrial environments.
Immunity: EN 61000-6-2.
Emission: EN 61000-6-4.
Configuration MyPixsysl Lab PC.

MCM260X-9AD Wiring Connections

Power Supply
Positive 12...24Vdc Terminal 1
Negative Terminal 2
Input Analog Input 1Analog Input 2Analog Input 3Analog Input 4
Thermocouple + Terminal 11 Terminal 14 Terminal 17 Terminal 20
Thermocouple - Terminal 10 Terminal 13 Terminal 16 Terminal 19
RTD Leg 1 Terminal 11 Terminal 14 Terminal 17 Terminal 20
RTD Leg 2 Terminal 10 Terminal 13 Terminal 16 Terminal 19
RTD Common Terminal 12 Terminal 15 Terminal 18 Terminal 21
Thermistor Leg 1 Terminal 10 Terminal 13 Terminal 16 Terminal 19
Thermistor Leg 2 Terminal 12 Terminal 15 Terminal 18 Terminal 21
mA and Voltage Input + Terminal 11 Terminal 14 Terminal 17 Terminal 20
mA and Voltage Input - Terminal 10 Terminal 13 Terminal 16 Terminal 19
Analog Output Analog Output 1Analog Output 2
Positive Terminal 4 Terminal 6
Negative Terminal 5 Terminal 7
Digital Inputs/Outputs
Input 0 12 -24 Vdc Terminal 36
Input 1 12 -24 Vdc Terminal 37
Input 2 12 -24 Vdc Terminal 38
Input 3 12 -24 Vdc Terminal 39
Input 4 12 -24 Vdc Terminal 40
Input 5 12 -24 Vdc Terminal 41
Input 6 12 -24 Vdc Terminal 42
Input 7 12 -24 Vdc Terminal 43
Output 0 -VDC Terminal 22
Output 1 -VDC Terminal 23
Output 2 -VDC Terminal 24
Output 3 -VDC Terminal 25
Output 4 -VDC Terminal 26
Output 5 -VDC Terminal 27
Output 6 -VDC Terminal 28
Output 7 -VDC Terminal 29
Multifunction Digital I/O
Input 1.0 12 -24 Vdc Terminal 45
Output 1.0 - Vdc Terminal 18
Input 1.1 12 -24 Vdc Terminal 46
Output 1.1 - Vdc Terminal 18
Input 1.2 12 -24 Vdc Terminal 47
Output 1.2 - Vdc Terminal 19
Input 1.3 12 -24 Vdc Terminal 48
Output 1.3 - Vdc Terminal 20
Input 1.4 12 -24 Vdc Terminal 21
Output 1.4 - Vdc Terminal 22
Input 1.5 12 -24 Vdc Terminal 50
Output 1.5 - Vdc Terminal 23
Input 1.6 12 -24 Vdc Terminal 51
Output 1.6 - Vdc Terminal 24
Input 1.7 12 -24 Vdc Terminal 52
Output 1.7 - Vdc Terminal 25
Encoder Input
ENC 1 A Terminal 36
ENC 1 B Terminal 37
ENC 1 C Terminal 45
ENC 2 A Terminal 38
ENC 2 B Terminal 39
ENC 2 C Terminal 46
ENC 3 A Terminal40
ENC 3 B Terminal 41
ENC 3 C Terminal 47
ENC 4 A Terminal 42
ENC 4 B Terminal 43
ENC 4 C Terminal 48
Counter Input
CNT 1 Terminal 36
CNT 2 Terminal 38
CNT 3 Terminal 40
CNT 4 Terminal 42

MCM280X-20AD Wiring Layout

MCM280X-20AD Modbus TCP to Analog and Digital IO wiring diagram

Enhance your control system's capabilities with the multipurpose MCM280X Modbus TCP I/O module. Featuring Ethernet Modbus TCP communication, RS485 expansion capability, and versatile analog and digital inputs and outputs, the MCM280X delivers flexible and scalable solutions for modern industrial automation systems.

What is the MCM280X-20AD?

The MCM280X-20AD is a Modbus TCP analog and digital I/O module designed for industrial automation, remote monitoring, and distributed control. It combines analog inputs, analog outputs, digital inputs, digital outputs, and encoder or counter functions in one compact DIN rail mounted unit.

How many analog inputs and outputs does the MCM280X-20AD have?

The MCM280X-20AD provides 4 analog inputs and 2 analog outputs. The analog inputs support multiple signal types, while the analog outputs are selectable as 4 to 20 mA or 0 to 10 V.

Which analog input types are supported?

The 4 analog inputs support thermocouples including K, S, R, J, T, E, N, and B, RTDs including PT100, PT500, PT1000, Ni100, PTC1K, and NTC10K, as well as process signals such as 0 to 10 V, 0 to 5 V, 0 or 4 to 20 mA, 0 to 60 mV, and potentiometer inputs from 1 to 150 kiloohms.

What analog output options are available?

The MCM280X-20AD includes 2 analog outputs, each selectable as 4 to 20 mA or 0 to 10 V DC. This allows the module to send precise control signals to actuators, drives, and other field devices.

How many digital inputs and outputs are available?

The module includes 8 standard PNP digital inputs, 8 multifunction PNP channels individually selectable as digital inputs or static outputs, and 8 static PNP digital outputs. This provides flexible digital I/O capability for monitoring and control applications.

Does the MCM280X-20AD support encoder or counter inputs?

Yes. The MCM280X-20AD provides 4 high speed 32 bit encoder or counter inputs with a maximum frequency of 100 kHz. These functions are overlapped to the PNP digital inputs and are suitable for pulse counting and motion monitoring applications.

What communication interfaces does the MCM280X-20AD have?

The module communicates over Ethernet using Modbus TCP/IP (10/100 Mbit) and also includes an RS485 serial port with Modbus RTU protocol. The RS485 port can operate as a transparent Modbus TCP to Modbus RTU gateway or bridge.

Can the MCM280X-20AD be expanded with additional I/O modules?

Yes. The integrated RS485 Modbus RTU extension port allows additional I/O modules to be connected in bridge mode, supporting up to 32 nodes. This enables easy system expansion without increasing network complexity.

How is the MCM280X-20AD configured?

The MCM280X-20AD can be configured through Modbus registers or by using the MyPixsysLab desktop application, providing flexible setup for communication, I/O selection, and operating parameters.

Where is the MCM280X-20AD typically used?

Typical applications include PLC and SCADA system expansion, remote I/O over Ethernet, industrial process monitoring, mixed analog and digital signal acquisition, and distributed control systems requiring Modbus TCP communication with optional RS485 expansion.

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