DGH D7500 Ethernet MODBUS TCP/IP Analog Output Module

The D7500 two-channel analog 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 output module contains two DAC converters generating an output signal from selection of two voltage or two current ranges; the type of signal can be selected independently for each channel and controlled via the host computer using MODBUS RTU protocol. The D7500 output module can be directly connected to and used for controlling a wide range of sensors and annunciators. The D7500 modules also include programmable features such as output slew rate, a communications watchdog timer, startup value and a ADC converter for readback of the output signal. It also features peer-to-peer (P2P) mode, accepting signal directly from an analog input 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 D7500 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.

• 2-channel analog output module
• Voltage ranges: 0-10V or ±10Vdc
• Current ranges: 0-20mA or 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
• Programmable features such as output slew rate, a communications watchdog timer, startup value and a 8-bit ADC converter for readback of the output signal
• Compatible with all commercial software programs supporting Modbus TCP/IP protocol
• Accuracy: ±0.1%
• Voltage output drive: 5mA maximum
• Span temperature coefficient: ±25ppm/°C maximum
• Input burnout protection to 250 Vac
• Settling time to 0.1% of the full scale of 1ms.
• Power requirements: Serial = 2.1W
• 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