DGH D7200 Ethernet MODBUS TCP/IP Analog Current Input Module

The D7200 7-channel current input module is part of the DGH’s D7000 data acquisition module family supporting RJ-45 Ethernet interface and communication via MODBUS TCP/IP protocol. This input module measures 4-20mA input signal and continuously converts the data at the rate of up to 25 conversions per second, storing the latest result in the buffer. The data (unsigned integer percentage of full-scale values) can then be retrieved by sending a Modbus query to the module from the host processor. The D7200 current input module can be directly connected to a wide range of sensors and annunciators, and provides all signal conditioning and linearisation, while containing no pots or DIP switches. The D7200 series of modules also features peer-to-peer (P2P) mode, allowing sending signal from analog input to analog output module, or digital input to digital output module without the need to involve a host computer. They are also able to upload information to cloud using ThingSpeak platform, and send e-mail notifications via Gmail free e-mail service (a limit value can be set for each channel separately, triggering the notification e-mail). For extra security, it utilises a non-volatile EEPROM (Electrically Erasable Programmable Read Only Memory) to store all user-selectable settings such as the range, meaning the values are maintained in the event of power loss. The D7200 module is compatible with any commercial software supporting Modbus TCP/IP ethernet protocol and is DIN-rail mountable (MK-1 mounting kit required). Combined with other D7000 modules, it provides the complete, customised data acquisition system for given application.

• 7-channel differential analog current input module
• Input signal: 4-20mA
• Modbus TCP/IP communication protocol
• RJ-45 Ethernet inteface – both 10MB and 100MB
• User-selectable features include analog input range per channel, baud rate, device address, filtering constants and others
• 16-bit ADC, 25/20 conversions per second (total across the enabled channels)
• Compatible with all commercial software programs supporting Modbus TCP/IP protocol
• Accuracy: ±0.05% of full scale maximum
• Span temperature coefficient: ±50ppm/°C maximum
• Input impedance: <100Ω (70Ω typical)
• Power requirements: Serial = 1.4W
• Temperature range -25°C to +70°C
• Mix and match with other D7000 modules to build a complete, customised data acquisition system

The applications for the D7000 data acquisition modules include:

• Process monitoring and control
• Remote data logging to any host computer
• Product testing
• Peer-To-Peer Communication