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EXS-1000™ Remote Terminal Unit Technical Specifications
| Software Specifications |
| 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 8500 |
| Communications options |
Bell Model 103, 202, or 212 modem. Digital radio with integral modem (450 or 900 Mhz). |
| Hardware Specifications |
| 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) |
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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) |
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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 |
| 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) |
Certifications of the EXS-1000 Remote Terminal Unit
- 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
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