Skip to main content Skip to search Skip to main navigation

PET-7251 PoE Ethernet I/O Module, 16-ch Wet Contact DI with 2-port Switch

Product information "PET-7251 PoE Ethernet I/O Module, 16-ch Wet Contact DI with 2-port Switch"

The PET-7251 CR is a PoE Ethernet I/O module that brings 16 wet contact digital inputs onto a Modbus network. Each channel can also operate as a 32-bit counter, with a maximum count of 4,294,967,295 and an input frequency of 100 Hz, which suits pulse counting and status monitoring from field contacts.

An integrated 2-port 10/100 Base-TX switch with LAN bypass allows the module to be daisy-chained along a line of devices. It can be powered either from PoE (IEEE 802.3af, Class 1) or from a +12 ~ +48 VDC terminal block. The built-in web server and Web HMI, together with ID, password and IP filter access control, support configuration and remote supervision.

Optical isolation is rated at 2500 VDC for I/O, with transient overvoltage protection stated at 3750 Vrms. Note that there is no channel-to-channel isolation. The module is DIN-rail mounted and is specified for an operating range of -25 ~ +75 °C.

Applications

  • Building Automation
  • Factory Automation
  • Machine Automation
  • Remote Maintenance
  • Remote Diagnosis
  • Testing Equipment
Product type: Ethernet I/O Module
Interface: Ethernet
Protocol: Modbus TCP, Modbus UDP
Digital inputs: 16
Ports: 2
PoE: Yes
Isolation: 2500 VDC
Power input: PoE or +12 ~ +48 VDC
Operating temperature: -25 ~ +75 °C
Mounting: DIN-rail

Specifications

Software
Built-in Web ServerYes
CPU Module
Watchdog TimerModule, Communication (Programmable)
Isolation
2-way IsolationI/O: 2500 VDC
EMS Protection
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
LED Indicators
StatusRun, Ethernet, I/O, PoE
Digital Input/Counter
Channels16
TypeWet Contact
Sink/Source (NPN/PNP)Sink/Source
ON Voltage Level+10 ~ +50 VDC
OFF Voltage Level+4 VDC (max.)
Max. Counts4,294,967,295 (32-bit)
Frequency100 Hz
Min. Pulse Width5 ms
Input Impedance10 kΩ
Overvoltage Protection+70 VDC
Ethernet
Ports2 x RJ-45, 10/100 Base-TX, Swtich Ports
PoEYes
LAN bypassYes
Access ControlID, Password and IP Filter
ProtocolModbus TCP, Modbus UDP
Power
Reverse Polarity ProtectionYes
Consumption3.1 W (max.)
Powered from PoEIEEE 802.3af, Class1
Powered from Terminal Block+12 ~ +48 VDC
Mechanical
Dimensions (mm)76 x 120 x 42 (W x L x H)
InstallationDIN-Rail mounting
Environment
Operating Temperature-25 ~ +75 °C
Storage Temperature-30 ~ +80 °C
Humidity10 ~ 90% RH, Non-condensing

Specifications as published by the manufacturer. Subject to change.

0 of 0 reviews

Average rating of 0 out of 5 stars

Leave a review!

Share your experiences with other customers.


Skip product gallery

Similar products

ET-7051 Ethernet I/O Module, 16-ch Wet Contact DI with Counter
ET-7051 CR ET-7051 Ethernet I/O Module, 16-ch Wet Contact DI with Counter

The ET-7051 CR is an Ethernet remote I/O module that brings 16 wet contact digital inputs onto a Modbus network. Each channel can also be set up as a 32-bit counter, which makes the module suited to counting pulses from sensors, meters and switch contacts without a separate counting device.Isolation is provided between the Ethernet side, the I/O side and the power input, with 2500 VDC rated for I/O and 1500 VDC for Ethernet. Channels are not isolated from one another. The module is designed for installations where hazardous voltages may be present on the input side.The built-in web server and web HMI allow the module to be configured and monitored from a browser. Access is controlled through ID and password protection plus an IP filter, and the module offers a dual watchdog and I/O pair connection for supervised operation.ApplicationsBuilding automationFactory automationMachine automationRemote maintenanceRemote diagnosisTesting equipment

Regular price: €219.00 per piece · volume discount from 10 pcs
Available to orderDelivery in about 2-3 weeks
ET-7251 Ethernet I/O Module, 16-ch Wet Contact DI with 2-port Switch
ET-7251 CR ET-7251 Ethernet I/O Module, 16-ch Wet Contact DI with 2-port Switch

The ET-7251 is an Ethernet remote I/O module for collecting signals from 16 wet contact digital inputs and passing the data to a host over Modbus TCP or Modbus UDP. Each input can also be configured as a 32-bit counter, which suits pulse counting and event logging on machines and building services.Built-in switch ports allow modules to be daisy-chained along a network line, reducing cabling between cabinets. The module provides a built-in web server with a web HMI for configuration and monitoring, and access control based on ID, password and IP filtering. Watchdog functions cover both the module and the communication link.Isolation is provided between the Ethernet and I/O sides, but the inputs are not isolated from one another, so channels should share a common reference. The unit is DIN-rail mounted and is rated for operation from -25 to +75 °C.ApplicationsBuilding AutomationFactory AutomationMachine AutomationRemote MaintenanceRemote DiagnosisTesting Equipment

Regular price: €283.00 per piece · volume discount from 10 pcs
Available to orderDelivery in about 2-3 weeks
PET-7051 PoE I/O Module, 16-ch Wet Contact Digital Input
PET-7051 CR PET-7051 PoE I/O Module, 16-ch Wet Contact Digital Input

PET-7051 CR is a PoE-powered Ethernet I/O module that monitors 16 wet contact digital inputs. Each input can also be configured as a 32-bit counter, which suits pulse counting and event logging on machines and building services.The module supports both Modbus TCP and Modbus UDP, and includes a built-in web server with web HMI for configuration and status viewing. Its I/O is isolated at 2500 VDC, and the inputs tolerate up to 70 VDC overvoltage. Channels are not isolated from each other, so the module suits applications where the input circuits share a common reference.Communication security features include ID, password and IP filter access control, plus a dual watchdog and programmable communication watchdog. The module is designed for DIN-rail mounting and operates from -25 ~ +75 °C.ApplicationsBuilding automationFactory automationMachine automationRemote maintenanceRemote diagnosisTesting equipment

Regular price: €238.00 per piece · volume discount from 10 pcs
Available to orderDelivery in about 2-3 weeks
PET-7250A PoE Ethernet I/O Module with 2-port Switch, 12-ch DI, 6-ch DO
PET-7250A CR PET-7250A PoE Ethernet I/O Module with 2-port Switch, 12-ch DI, 6-ch DO

The PET-7250A is a networked I/O module from the ET-7000/ET-7200 range, designed to be controlled remotely over Ethernet using Modbus TCP or Modbus UDP. It suits engineers integrating field signals into HMI, SCADA, PLC or other industrial control software, with a built-in web server and web HMI for direct monitoring and control.Each of the 12 digital inputs accepts either dry or wet contact and can be configured as a 32-bit counter. The 6 isolated open-collector outputs are sink-type, rated at 500 mA per channel. Power can come from IEEE 802.3af Class 1 PoE or from a +12 ~ +48 VDC terminal block.Two built-in 10/100 Base-TX switch ports with LAN bypass allow daisy-chaining without an external switch. Ordering code PET-7250A CR is supplied as the PoE I/O Module with 2-port Ethernet Switch, 12-ch DI, 6-ch DO (RoHS) listed in the shop.ApplicationsBuilding automationFactory automationMachine automationRemote maintenanceRemote diagnosisTesting equipment

Regular price: €329.00 per piece · volume discount from 10 pcs
Available to orderDelivery in about 2-3 weeks