The DGH D1000M series data acquisition modules use the Modbus RTU protocol
for communication. The D1000M are complete single-channel data
acquisition systems that are well suited to applications such as
SCADA, data monitoring, data loggers, PLC’s, process controllers and
instrumentation. The modules convert an analog input signal to
engineering units and transmit in ASCII data format to any host or PLC
with RS485 or RS232 serial ports. The D1000M Modbus DAS series analog
signal input types include
Voltage, Current, Temperature,
Flow, Bridge and Load
Cell.
The D1000M series converts the digital signal data into engineering units
using look-up tables. The resultant data is stored in a memory buffer. The
module’s ADC continuously converts data at the rate of 8 conversions per
second and stores the latest result in the buffer.
Using RS485 up to 247 Modbus DAS modules may be linked to an RS485 port or PLC.
Since Modbus protocol does not support echoing D1000M RS232 modules may
not be daisy-chained. This limits you to one module per RS232 serial port.
The four analog input D5000M Modbus DAS modules provide direct connection to
four analog signals of the same type and range. ADC conversion and
linearization of sensor input data and communicates in ASCII or Modbus
RTU protocol via
RS232 or RS485 serial connection.
DIN-100
Modbus series are low cost single channel modules that are DIN rail
mountable.
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| D1100M |
Voltage |
+/-10mv, +/-100mV, +/-1V, +/-5V, +/-10V, +/-100V |
| D1200M |
Current |
+/-1mA, +/-10mA, 4-20mA, +/-100mA, +/-1Amp |
| D1300M |
Thermocouple |
J, K, T, E, R, S, B, C |
| D1400M |
RTD |
.00385, .00388, .00392 |
| D1450M |
Thermistor |
2252 Ohm, Honeywell TD Series |
| D1500M |
Bridge |
+/-30mV, +/-100mV, 1-6V |
| D1600M |
Frequency |
1-20KHZ |
| D1700M |
Digital I/O |
7 Discrete Inputs, 8 Discrete Outputs |
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| Modbus
Software Compatibility |
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The DGH Modbus I/O modules are compatible with all
commercial software programs and OPC servers that support the Modbus RTU
protocol. Commercials software programs from Wonderware, Intellution,
National Instruments LabVIEW, and Dasylab all support the Modbus RTU protocol.
OPC Servers from Kepware and MatrikonOPC support the Modbus RTU protocol and can be used to connect
with other software programs.
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LabVIEW Block Diagram using Modbus Serial Driver
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