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Serial Data Acquisition

The serial interface remains one of the most popular communications interface in industrial electronics.

The Serial uDAQ range includes Analog I/O, Digital I/O, Counter/Timer and Temperature units. Units are supplied with a serial cable, power supply, API software and our ready to use acquisition package, Waveview For Windows. Optional accessories are available including power supplies, various screw terminal adaptors & interface modules.

The Serial μDAQ Analog Input series support 16 analog inputs and 4 analog outputs with 14-bit resolution. It’s available in two models, the SRL-26 that excludes analog outputs and the SRL-30 that include the analog outputs.
RS-232 to RS-485 Signal Converter.

The Serial μDAQ Digital I/O and Counter/Timer series has support for 24 to 120 digital input/output lines and 6 counters. They are available in 5 basic models, SRL-24, SRL-48, SRL-72, SRL-96 and SRL-120.

Eagle Technology is proud to announce the release of it's Modbus Support for all MicroDAQ serial data acquisition products.


- Open source Protocol - Easy to implement - Communicate to our Daq Devices from any Mosbus Compliant Device

Modbus is communication standard developed in the late 1970's by Modicon. It has become the de-facto standard for the industrial instrumentation and control market. Utilising a master/slave format, the protocol involves sending serial packets from a master device to a slave device. This action is performed using one of 2 variants of the protocol, Modbus-RTU or Modbus-ASCII.

All serial MicroDAQ products can now be ordered with integrated modbus firmware. This allows the unit to act as a slave device and communicate using the Modbus protocol. One is able to a communicate from the slave device to a PC acting as a master device or to any other Modbus-compliant device such as a PLC. The slave data acquisition device can either be polled for a status or sent a command to carry out.

MicroDAQ devices are fitted with either RS232 or RS485 serial interfaces and are available with different analog or digital i/o options. These include 16 or 32 analog inputs, 4 or 8 analog outpus, 24~120 DIO lines as well as upto 6 counter/timers. Analog is resolution is either 14-bit or 16-bit (model dependent).

We plan to implement Modbus TCP/IP for all our ethernet network devices in the near future.
The Serial μDAQ Isolated Digital I/O series are available in three versions. A SRL-62 that is a Optically isolated input device, a SRL-63 that is a Reed Relay Output device and a SRL-69 that is a combination of the two.
The Serial μDAQ Temperature Input series supports 8, 16 and 32 temperature inputs. The two basic models are the SRL-73T and SRL-73R, which supports thermocouple and RTD probes respectively.