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EZ-RTU
Overview
EZ-RTUThe EZ-RTU is a general purpose single board RTU that is designed with an integrated spread spectrum radio, and a C programmable core processor module. The base unit has eight digital inputs, eight digital outputs, and can be expanded to a total of 24 digital inputs, and 24 digital outputs directly from the base board. Additional digital and analog expansion is provided through Automation and Electronics, Inc. Smart I/O modules. By adding these expansion modules, the I/O is expandable to 216 D/I, 216 D/O, 128 A/I, 128 A/O.
As designed, the EZ-RTU functions as a low cost polling master to bring back multiple digital or analog I/0 data from up to 32 RTUs. Other applications are for point-to-point RTUs which act as wire line replacements, with 24 D/I mapped to 24 D/O as a starting I/O make-up.
The EZ-RTU can also be used to pass MODBUS data serially to a PLC or HMI. In this mode, the unit also acts as a polling master. The I/O data is available to the PLC via standard MODBUS function calls.
Features
- MODBUS RTU protocol
- C Programmable
- Four serial ports
- Eight or 24 DI
- Eight or 24 DO
- 24 hour parameter backup with on board capacitor
- Industrial temperature rating
- Expandable with serial I/O modules
Options
- DIF-16: Sixteen optically isolated 12 VDC digital inputs (Max. 2)
- ROA-16: Sixteen relay output board
- SDAM/PDAM: Eight/sixteen analog input Smart I/O RS-485 module
- SDAO: Two analog output Smart I/O RS-485 module
- SDIO: 48 D/I; 48 D/O Smart I/O RS-485 module
- Point to multi-point master
- Wire line replacement
- Point to point telemetry
- Wireless 4-20 mA loops
- MODBUS repeater
Specifications
| Mechanical | |
|---|---|
| Size: | 4-1/2" x 9" PC board |
| Mounting: | Snap track |
| Environmental | |
| Operating temperature: | -40 to 158 deg. F (-40 to 70 deg. C) |
| Relative humidity: | 5 to 90% non-condensing |
| Power requirements | |
| No radio: | 125 mA @ 12 VDC; 70 mA @ 24 VDC |
| During transmit: | 275 mA @ 12 VDC maximum with spread spectrum radio |
| CPU / Memory | |
| CPU: | 29.4 MHz Rabbit 3000TM |
| Memory: | 128 kB SRAM, 256 kB Flash |
| Input/Output | |
| Digital input: | Eight optically isolated on-board, (10 mA @ 12 VDC or 5 mA @ 24 VDC) sink to ground. Expansion to 24 total digital inputs with external 16 digital input board. Serial expansion to 216 digital inputs. |
| Digital output: | Eight 100 mA FET driver, open drain, sink to ground. Expansion to 24 total digital outputs with external ROA-16 16 relay output board. Serial expansion to 216 digital outputs. |
| Analog inputs: | Expansion to 128 analog inputs with serial A/D modules, Eight 12-bit A/Ds per module. |
| Analog outputs: | Expansion to 128 analog outputs with serial D/A modules, Two 12-bit D/As per module. |
| Communications | |
| General: | One RS-232/RS-485 communication port, 38,400 bps |
| Smart I/O: | One RS-485 9,600 bps Smart I/O communication port |
| HMI: | One RS-485 communication port free for custom HMI user interface |
| Radio: | One piggy back on-board radio or piggy back RS-232 communication port |
| Standard radio: | Integrated 900 MHz spread spectrum or 2.4 GHz piggyback module |
| Optional radio: | External radios available, via RS-232/RS-485 communication port |
| Protocols: | MODBUS RTU protocol |
| Programming | Dynamic C® |
