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CAC EXS-1000 Remote Terminal Unit (RTU)
Quick Links to Information Below
- Applications of the CAC EXS-1000 Remote Terminal Unit (RTU)
- CAC EXS-1000 Remote Terminal Unit (RTU) Features
- Certifications of the CAC EXS-1000 Remote Terminal Unit (RTU)
- CAC EXS-1000 Remote Terminal Unit (RTU) Technical Specifications
| CAC EXS-1000 Remote Terminal Unit (RTU) Highlights |
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Flexible SCADA interface optionsPDF Documents
eP’s CAC EXS-1000 Extreme Service Remote Terminal Unit (RTU) series is for use in automating oil and gas production wells, and other general purpose applications requiring small to medium I/O point counts. The CAC EXS-1000 electronic circuit boards are conformally coated for protection in extremely corrosive, humid and temperate environments.
The CAC EXS-1000 design is based on over 25 years of experience in providing process controllers for use in harsh environments along with quality controlled manufacturing practices. This design provides high reliability for even the most extreme conditions.
eP’s CAC EXS-1000 is a cost effective production automation controller designed for simple applications as a standalone unit, or for more complex applications that involve control, communications, and alarming.
Start-up is easy using the keypad/liquid crystal display or Windows™ based configuration management software. No special programming knowledge is required to apply the automatic alarm based control functions.
The CAC EXS-1000 is designed for easy communications to host computers and DCS systems using either Modbus™ RTU, Modbus ASCII or CAC’s 8500 protocol.
The basic RTU measures 8” x 7.5” x 2.5” and may be mounted stand-alone on any control panel or optionally packaged in a NEMA 4 enclosure for outdoor service.
Low power requirements make the CAC EXS-1000 ideal for solar power applications. Base unit power consumption is 2.5 watts @ 12 Vdc.
Applications of the CAC EXS-1000 Remote Terminal Unit (RTU)
- Electric Submersible Pumps (ESP)
- Gas Lift Systems
- Steam Injection
- Water/CO2 Injection (WAG)
- Remote Terminal Units
- Variable Speed Motor Drive Control
- Data Logger
CAC EXS-1000 Remote Terminal Unit (RTU) Features
- Eight digital inputs/eight digital outputs
- Eight analog inputs/two analog outputs
- Two RS-232 serial ports expandable to four or six
- AGA3 1992 Gas Flow Calculations for one meter run with AGA8 1992 Gross Method 2 Supercompressibility
- Controls up to two PID loops
- Automatic alarm based control
- Eight channel data logger with up to 250 records per channel
- RTD signal conditioning provided for one analog input
- Totalizer for accumulating flow
- User programmable via CAC Automatic Control Logic (ACL)
- Cellular Digital Packet Data (CDPD) compatible
Certifications of the CAC EXS-1000 Remote Terminal Unit (RTU)
- FCC Part 15, Subpart B, Class A
- Electro Magnetic Compatibility (EMC Directive)
- EN 55011:1998
- EN 61326:1997
- IEC 1000-4-2:1995
- IEC 1000-4-3:1995
- IEC 1000-4-4:1995
- IEC 1000-4-5:1995
- IEC 1000-4-6:1996
- IEC 1000-4-11:1994
- FM Class I, Division 2, pending
CAC EXS-1000 Remote Terminal Unit (RTU) Technical Specifications
Software Specifications |
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Control | Two PID control loops, output calculated every second |
Serial Communication Interface | Two RS-232 asynchronous serial ports expandable up to four or six |
Communications Protocols | Modbus ASCII, Modbus RTU, or CAC 8500 |
Communications Options | Bell Model 103, 202, or 212 modem. Digital radio with integral modem (450- or 900-Mhz). |
Hardware Specifications |
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Analog Inputs | Eight (one analog input can be jumpered for direct 100 Ohm platinum RTD input) |
Range | Nominal 0 to 5 Vdc, 1 to 5 Vdc, 0 to 25 mA or 4 to 20 mA (jumper selectable) |
Resolution | 12 Bit, unipolar |
Accuracy | Current inputs ±0.1% of full scale, voltage inputs ±0.1% of full scale (including linearity, hysteresis, repeatability, and resolution) |
Temperature Coefficient | ±0.01% of full scale/degree F |
Analog Outputs | Two |
Range | 0 to 25 mA or 4 to 20 mA |
Resolution | 12 Bit, unipolar |
Accuracy | ±0.1%, firmware calibratable to ±0.1% (including linearity, hysteresis, repeatability, and resolution) |
Digital Inputs | Eight inputs @ 4 to 32 Vdc, 2 Hz maximum, 2 mA current limited (firmware filtered) |
Optional | Turbine meter prescaler accepts up to 5 Khz signals from turbine meter |
Digital Outputs | Eight outputs @ 0.5 Amp continuous, 6 Amp pulsed, 32 Vdc maximum |
Real Time Clock | Accurate to within ±1 minute/ month over operating temperature range |
Data Ports | Two RS-232 asynchronous serial ports (1 for MMI, 1 for 300 to 19.2 KBaud telecommunications) |
Expansion ports provide RS-232 or RS-485 interface to external instruments and/or controllers |
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Operating Range | -40° to +85°C, 0-95% relative humidity (non-condensing) |
Power Requirements | 8 to 32 Vdc @ 2.5 Watts average |
Options | 110 Vac, 50/60 Hz input with one day battery (12 Vdc) backup, 0° to 60°C operation (assumes 1 Amp maximum load) |
24 Vdc battery charging and backup for AC or solar powered units |
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12/24 Vdc DC to DC converter, used for 4 to 20 mA transmitters when battery backup is 12 Vdc |
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220 Vac, 50/60 Hz operation for AC input units |
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Local Display | 2 x 24 LCD (-20° to +70°C), optional with 20-key keypad |
Overvoltage/Transient Protection | All inputs/outputs and power supply devices provided with surge protection to ANSI/IEEE C37-90.1-1989 (IEEE Std. 472-1974) |
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