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The MDC-700 series is a Modbus Data Concentrator used to access data from disparate Modbus slave devices with a contiguous Modbus address table ranged by the concentrator. Up to 240 Modbus/RTU commands can be performed to read data from Modbus slave devices via RS-232/485, and up to 8 Modbus/TCP masters are allowed to get the polled data via the Ethernet. The Modbus/TCP masters directly read/write the data in the MDC-700 instead of polling each Modbus/RTU slave device one by one. This way not only makes the data on the RS-232/485 sharable to multiple Modbus/TCP master but also shorten the time to read/write data from/to multiple Modbus/RTU slave devices.
Editing the Modbus/RTU commands for accessing the Modbus RTU slaves is simple and convenient with Comma Separated Values (CSV) format. In addition, a web-based user interface is provided to configure the concentrator and remotely monitor the state of the connection of Modbus RTU slaves.

| Display | |
|---|---|
| Type | 5 x Digit 7 Segment LED Display |
| LED Indicators | |
|---|---|
| Status | 1 x System, to display heart beat |
| Ethernet | |
|---|---|
| Ports | x1, 10/100 Base-TX |
| Protocol | Modbus/TCP Slave |
| COM Ports | |
|---|---|
| Ports | 1 x 5-wire RS-232, 1 x 2-wire RS-485, 3 x 2-wire RS-485 (2500 VDC Signal Isolation) |
| Baud Rate | 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 |
| Data Format | N81, E81, O81 |
| Protocol | Modbus RTU Master/Modbus RTU Slave |
| Polling Definition | 250 definitions for all RS-232/485 ports |
| Shared Memory | 9600 registers for each of AI, AO, DI and DO data |
| Power | |
|---|---|
| Input Range | +10 VDC ~ +30 VDC (non-regulated) |
| Consumption | 2.5 W |
| Mechanical | |
|---|---|
| Casing | Metal |
| Dimensions (mm) | 102 mm x 125 mm x 28 mm (W x H x D) |
| Installation | Wall Mounting |
| Environment | |
|---|---|
| Operating Temperature | -25 ~ +75 °C |
| Storage Temperature | -30 ~ +80 °C |
| Humidity | 10 ~ 90% RH, non-condensing |