Providing networking ability and various digital I/O functions, the PETL-7000 and tET/tPET series are IP-based Ethernet I/O monitoring and control modules. The module can be remotely controlled through a 10/100 M Ethernet network by using Modbus TCP/UDP protocol. Modbus has become a de facto standard communications protocol in industry, and is now the most commonly available means of connecting industrial electronic devices. This makes the PETL-7000/tET/tPET series perfect integration with the HMI, SCADA, PLC and other software systems.

The functionality of the PETL-7000/tET/tPET series modules is almost the same as the PET-7000 series. The PETL-7000/tET/tPET series Ethernet I/O modules support various I/O types, like photo-isolated digital input, relay contact, PhotoMOS relay, and open-collector output. The module can be used to create DI to DO pair-connect through the Ethernet. Once the configuration is completed, the modules can poll the status of the local DI channels and then use the Modbus/TCP protocol to continuously write to a remote DO device in the background. It's useful when connecting digital I/O devices that do not themselves have Ethernet capability.
 Network Configuration
DHCP minimizes configuration errors caused by manual IP address configuration, such as address conflicts caused by the assignment of an IP address to more than one computer or device at the same time. The PETL-7000/tET/tPET series module supports the DHCP client function, which allows to PETL-7000/tET/tPET easily obtain the necessary TCP/IP configuration information from a DHCP server. The module also contains a UDP responder that transmits its IP address information a UDP search from the eSearch utility program, making local management more efficient.

 Built-in Web Server
The series of Ethernet I/O modules features a powerful 32-bit MCU to enable efficient handling of network traffic. It also has a built-in web server that provides an intuitive web management interface to allow users to modify the settings of the module including DHCP/Static IP, gateway/mask and serial ports.
 Built-in Dual Watchdog
The module provides dual watchdog: CPU watchdog (hardware function) and host watchdog (software function). The CPU watchdog which automatically resets the CPU if the built-in firmware is operating abnormally, while the host watchdog set the digital output with predefined safe-value when there is no communication between the module and the host (PC or PLC) for a period of time (watchdog timeout). The dual watchdog is an important feature that ensures the module operates continuously, even in harsh environments.
 PWM (Pulse Width Modulation)  
The DOs on the t(P)ET/PETL series provide PWM (pulse generation) function. Uses can set different frequency and duty cycle for each digital output channel. In addition, the two DO channels can work independently or simultaneously. The t(P)ET/PETL series product reduces the complexity of the control system and enhances the timing accuracy.
 Frequency Measurement  
he t(P)ET/PETL series module also provides the function of the frequency measurement; it gets the DI count in a certain time and calculate the frequency. Rather than polling by the remote host, our module can count out the frequency directly, reduce the communication delay caused by two ends and also increase the accuracy of frequency measurement. In order to applying for more applications, this module provides 3 scan modes and 4 moving average methods for user to select the best way in their applications. This feature can be used for rotation and speed measurements.
 Low Power Consumption  
The PETL-7000/tPET series module offers true IEEE 802.3af-compliant (classification, Class 1) Power over Ethernet (PoE) using a standard category 5 Ethernet cable to receive power from a PoE switch such as the NS-205PSE. If there is no PoE switch on site, the module will also accept power input from a DC adapter. The PETL-7000/tET/tPET series is designed for ultra-low power consumption, reducing hidden costs from increasing fuel and electricity prices, especially when you have a huge amount of device servers installed. Reducing the amount of electricity consumed by choosing energy-efficient equipment can have a positive impact on maintaining a green environment.
The module is equipped with removable terminal block connectors to allow easy wiring. For maximum space savings, the tET/tPET series is offered in an amazing tiny form-factor while the PETL-7000 series is palm-size form-factor; this makes them can be easily installed in anywhere, even directly embedded into a machine.
 Ventilated Housing Designed to Operate Between -25¢XC to +75¢XC  
PETL-7000 is housed in a fire retardant plastic (UL94-V0 Level) shell/case with a column-like ventilator that helps to cool the working environment inside the shell/case and allows PETL-7000 to operate at temperatures ranging from -25 ¢XC to +75 ¢XC.
Product Lines Comparison Table
Comparison Item tPET PETL-7000 PET-7000
CPU 32-bit ARM 80186
Ethernet 10/100 M, PoE
Modbus TCP/UDP Yes
Web Configuration Yes
Web HMI Simplified Yes
Multi-client Yes (max. connections: 5) Yes (max. connections: 12)
IP Filter Yes (white list)
Latched DI Yes
DI as Counter 32-bit, 3.5 kHz 32-bit, 500 Hz
I/O Pair-Connection Yes (Poll/Push Mode) Yes (Poll Mode)
PWM Yes (100 Hz max.) -
Frequency Measurement Yes (3.5 kHz max.) -
Dual Watchdog Yes (CPU, host) Yes (Module, host)
ESD Protection +/- 4 kV
Surge Protection - +/- 0.5 kV
Form Factor Tiny Size Palm Size
Remarks Cost-effective -
Will be available
Available soon
Will be phased out
PETL-7000 Series
Digital Input/Relay Output
Model Ethernet DI Relay Output
Channel Type Sink/Source Channel Relay Type Max. Load Current
  PETL-7060 10/100 M, PoE 6 Wet Sink, Source 6 Power Relay Form A
5.0 A/channel
Will be available
Available soon
Will be phased out
tET/tPET Series
Model Ethernet PoE Bus Protocol I/O Specification
Isolation DI DO
  tET-P6 Yes - Ethernet
10/100 M
Modbus TCP Yes 6-ch (Sink/Source) -
tPET-P6 Yes
  tET-PD6 Yes - Ethernet
10/100 M
Modbus TCP Yes 6-ch
tPET-PD6 Yes
  tET-C4 Yes - Ethernet
10/100 M
Modbus TCP Yes - 4-ch
(NPN, Sink)
tPET-C4 Yes
  tET-A4 Yes - Ethernet
10/100 M
Modbus TCP Yes - 4-ch
(PNP, Source)
tPET-A4 Yes
tET-P2C2 Yes - Ethernet
10/100 M
Modbus TCP Yes 2-ch (Sink/Source) 2-ch
(NPN, Sink)
tPET-P2C2 Yes
tET-P2A2 Yes - Ethernet
10/100 M
Modbus TCP Yes 2-ch
(PNP, Source)
tPET-P2A2 Yes
  tET-P2POR2 Yes - Ethernet
10/100 M
Modbus TCP Yes 2-ch (Sink/Source) 2-ch Form A PhotoMos Relay
  tET-PD2POR2 Yes - Ethernet
10/100 M
Modbus TCP Yes 2-ch
2-ch Form A
PhotoMos Relay
tET-P2R2 Yes - Ethernet
10/100 M
Modbus TCP Yes 2-ch (Sink/Source) 2-ch Form A Relay
tPET-P2R2 Yes
  tET-PD2R1 Yes - Ethernet
10/100 M
Modbus TCP Yes 2-ch
1-ch Form A Relay
tPET-PD2R1 Yes
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