The D8720 15-channel digital output module is part of the DGH’s D8000 data acquisition module family. This output module contains 15 individial open-collector transistor outputs to 30Vdc, 100mA maximum, and is able to control devices requiring an ON/OFF signal such as lamps, annunciators etc. The D8720 input module can be directly connected to relays and annunciators. A range of additional programmable features is available, such as baud rate, parity type, power-on bit state or a communications watchdog times which can be used to move the analog output signal to a known “safe” condition in an event of communication failure. 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 D8720 module is compatible with any commercial software supporting Modbus RTU protocol and is DIN-rail mountable (MK-1 mounting kit required). Combined with other D8000 modules, it provides the complete, customised data acquisition system for given application.

• 15-channel digital output module with open-collector outputs to 30Vdc, 100mA maximum
• Vsat: +0.3Vdc max. at 100mA
• Short circuit protection to 500mA
• Modbus RTU protocol
• User-selectable features include baud rate, parity typem, communication watchdog timer and others
• Digital Output update rate, 4.5Hz
• RS-485 serial communications interface
• Compatible with all commercial software programs supporting Modbus RTU protocol, including programs from Wonderware, DreamReport, National Instruments Labview, Indusoft and others
• Isolation 500Vac, input common to system ground
• Power requirements: Serial = 1.0W
• Temperature range -25°C to +70°C
• Mix and match with other D8000 modules to build a complete, customised data acquisition system

The applications for the D8000 data acquisition modules include:

• Process monitoring and control
• Remote data logging to any host computer
• Product testing
• Direct connection to PLC