CAC EXS-1000 Mini 4x4 Remote Terminal Unit (RTU)

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• Applications for the CAC EXS-1000 Mini Remote Terminal Unit (RTU)
• Features of the CAC EXS-1000 Mini Remote Terminal Unit (RTU)
• CAC EXS-1000 Mini Remote Terminal Unit (RTU) Technical Specifications

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• CAC EXS-1000 Mini 4x4 Remote Terminal Unit (RTU)
• CAC EXS-1000 Mini 4x4 Remote Terminal Unit (RTU) - Spanish Version

eP’s CAC EXS-1000 Extreme Service Mini 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 Mini RTU electronic circuit boards are conformally coated for protection in extremely corrosive, humid and temperate environments.

The CAC EXS-1000 Mini RTU 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 Mini RTU is a cost effective production automation controller designed for simple applications as a stand-alone 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 Mini RTU 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 standalone on any control panel or optionally packaged in a NEMA 4 enclosure for outdoor service.

Low power requirements make the CAC EXS-1000 Mini RTU ideal for solar power applications. Base unit power consumption is 2.5 watts @ 12-Vdc.

Applications for the CAC EXS-1000 Mini Remote Terminal Unit (RTU)

• Electric Submersible Pumps (ESP)
• Gas Lift Systems
• Steam Injection
• Water/CO₂ Injection
• Variable Speed Motor Drive Control

Features of the CAC EXS-1000 Mini Remote Terminal Unit (RTU)

• Four digital inputs/four digital outputs
• Four analog inputs
• Two RS-232 serial ports expandable to four
• AGA3 1992 Gas Flow Calculations for one meter run with AGA8 1992 Gross Method 2 Supercompressibility
• Automatic alarm based control
• Eight channel data logger with up to 250 records per channel
• Totalizer for metering flow
• User programmable via CAC Automatic Control Logic (ACL)
• Cellular Digital Packet Data (CDPD) compatible

CAC EXS-1000 Mini Remote Terminal Unit (RTU) Technical Specifications

Software Specifications
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
Analog Inputs	Four
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
Digital Inputs	Four 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	Four 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
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
	12/24-Vdc DC to DC converter, used for 4- to 20-mA transmitters when battery backup is 12-Vdc
	220-Vac, 50/60-Hz operation for AC input units
Local Display	2 x 24 LCD (-20°C 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)