D8720 Digital Output Module


The D8720 Modbus digital output module contains fifteen isolated digital outputs for controlling solid-state relays and annunciators. Each digital output can be pulled-up to +30Vdc and sink up to 100mA per without damage.

The D8720 series digital output module contains a user-programmable communications watchdog timer. The watchdog timer can be used to force the digital outputs to a known “safe” condition in the event of a communications lost to the module. The “safe” condition value can be specified in the Initial Value register.

All digital data values are transmitted to a host computer using the Modbus RTU serial protocol via the USB virtual serial port connection.

Download Datasheet

Download Manual

The D8720 USB digital output modules can be mounted on a DIN-rail using the MK-1 mounting kit.


Available on backorder

Additional Information

Dimensions 7.14 × 4 × 1.5 in

• USB communications interface.
• Modbus RTU Protocol.
• 500Vrms digital output isolation.
• 16-bit analog input measurement resolution.
• Continuous self-calibration
• Requires +10V to +30Vdc unregulated supply, 1.0W.
• Removable screw terminal plug connectors.
• 3ft USB cable included.
• CE marked.
• 15 Open-Collector Digital Outputs
• Communications Watchdog Timer
• User Programmable Digital Output Initial Values


The D8720 digital output modules are compatible with all commercial software programs and OPC servers that support the Modbus RTU protocol. Commercials software programs from DreamReport, Wonderware, Intellution, National Instruments Labview, Indusoft, DAQFactory and DASYLab all support the Modbus RTU protocol. OPC Servers from Kepware and MatrikonOPC support the Modbus RTU protocol.


• Process monitoring and control
• Product testing

Click outside to hide the comparison bar