ET-2255-32
The web server for configuration supports Modbus TCP/UDP, MQTT, and SNMP V2c protocols, features a 2-port Ethernet switch (LAN bypass) for daisy-chain wiring, supports dual watchdog functions, includes built-in I/O with 16-channel DI (wet/dry) and 16-channel DO (sink), and has an LED display to indicate I/O status, all while meeting CE, UKCA, FCC, RoHS, and WEEE standards.
Features
The ET-2255-32 is a versatile I/O module featuring 16 digital inputs (wet/dry contact) and 16 digital outputs (sink type). Each input channel can serve as a 32-bit counter, and each output channel can be configured with a power-on value and a safe value to ensure reliable operation in hazardous voltage environments. The module includes a built-in 2-port Ethernet switch for daisy-chain wiring, offering flexibility in device configuration, simplifying installation, and reducing infrastructure costs. It is equipped with 3000 Vrms optical isolation for transient overvoltage protection, but does not offer channel-to-channel isolation. The module also provides robust EMS (EFT/ESD/Surge) protection and 3000 VDC I/O isolation to safeguard against noise in industrial settings.
The ET-2255-32 supports I/O Pair-Connection functionality, which allows for DI-to-DO pairing connections over Ethernet with a remote module. Once configured, this feature enables local DI data to be sent to remote DO channels in Push mode via Modbus TCP, or to pull remote DI data to local DO channels.
Additionally, the module supports the MQTT protocol for both publishing and subscribing to messages. When connected to an MQTT Broker Server, it can publish real-time I/O status updates and receive messages from subscribed topics. In case of a communication disruption, the module’s automatic reconnect feature restores the connection, and the Keep-Alive Interval mechanism ensures continuous communication with the broker.
The ET-2255-32 also complies with the SNMP V2c specification, allowing it to send module and I/O information to SNMP network management systems. This enables real-time status monitoring and, with the Trap function enabled, the module can proactively alert administrators to changes in I/O statuses or during restarts, keeping them informed about channel conditions at all times.
Specifications
Software | |
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Built-in Web Server | Yes |
CPU Module | |
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CPU | 32-bit ARM |
Watchdog Timer | Module, Communication (Programmable) |
Isolation | |
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2-way Isolation | Ethernet: 1500 VDC I/O: 3000 VDC |
EMS Protection | |
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EFT (IEC 61000-4-4) | ±4 kV for Power Line |
ESD (IEC 61000-4-2) | ±4 kV Contact for Each Terminal ±8 kV Air for Random Point |
Surge (IEC 61000-4-5) | ±2 kV for Power Line |
LED Indicators | |
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Status | Run, Ethernet, I/O |
Digital Input/Counter | |
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Channels | 16 |
Type | Dry Contact Wet Contact |
Sink/Source (NPN/PNP) | Dry: Source Wet: Sink/Source |
ON Voltage Level | Dry: Close to GND Wet: +5 ~ +50 VDC |
OFF Voltage Level | Dry: Open Wet: +1 VDC (max.) |
Max. Counts | 4,294,967,295 (32-bit) |
Frequency | 2.5 kHz |
Input Impedance | 7.5 kΩ |
Overvoltage Protection | +70 VDC |
Low Pass Filter | 1 ~ 6500 ms (0.08 Hz ~ 500 Hz) |
Digital Output | |
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Channels | 16 |
Type | Open Collector |
Sink/Source (NPN/PNP) | Sink |
Load Voltage | +3.5 ~ +50 VDC |
Load Current | 500 mA/channel |
Overvoltage Protection | +60 VDC |
Overload Protection | 1.4 A (with short-circuit protection) |
Short-circuit Protection | Yes |
Power on Value | Programmable |
Safe Value | Programmable |
Ethernet | |
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Ports | 2 x RJ-45, 10/100 Base-TX, Switch Ports |
LAN bypass | Yes |
Access Control | Password and IP Filter |
Protocol | Modbus TCP, Modbus UDP, MQTT, SNMP V2c |
Power | |
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Reverse Polarity Protection | Yes |
Consumption | 4.7 W (max.) |
Powered from Terminal Block | +10 - +48 VDC |
Mechanical | |
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Casing | Plastic |
Dimensions (mm) | 31 x 157 x 129 (W x L x H) |
Installation | DIN-Rail mounting |
Environment | |
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Operating Temperature | -25 - +75 °C |
Storage Temperature | -40 - +80 °C |
Humidity | 10 - 90% RH, Non-condensing |