The D7720 15-channel digital input/output 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 module contains 8 digital inputs which may be used for sensing contact closures and 7 open-collector transistor outputs, which may be used to control a range of devices controllable by ON/OFF signal. Each input/output is independent and can be controlled from the host computer using MODBUS RTU protocol. The D7730 module contains a programmable communications watchdog timer able to move the output signals to a known “safe” location in the event of communication failure. It also features peer-to-peer (P2P) mode, accepting signal directly from a digital input to a digital output module without the need to involve a host computer. It is 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, this module 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 D7730 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.

• Combination digital module with 8 inputs and 7 outputs
• Inputs/Outputs to 30Vdc and 100mA maximum
• Outputs Vsat of 0.3Vdc maximum at 100mA
• Modbus TCP/IP communication protocol
• RJ-45 Ethernet inteface – both 10MB and 100MB
• Programmable communications watchdog timer
• Isolation to 500Vac, input common to system ground
• Compatible with all commercial software programs supporting Modbus TCP/IP protocol
• Short circuit protection to 500mA
• Power requirements: Serial = 2.5W
• 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