| Analogue Input Module |
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| 2500M/AI2 - Two
channel analogue input |
This analogue input module is used to monitor analogue signals from a wide
range of plant sensors. The mA and TC inputs each require the appropriate
Terminal Unit. The second channel of the AI2 has a special high impedance range for use with
zirconia probe inputs. |
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| No of channels |
2 |
| Input types |
TC, RTD, Volts, mA, mV, Potentiometer,
Pyrometer, Zirconia probe |
| mV range |
-150mV to +150mV at input impedance >100MΩ |
| mA range |
-22mA to +22mA with 5Ω burden in the
Terminal Unit |
| Volts range |
-10.2V to +10.2V at input impedance 303kΩ |
| RTD support |
Support for 2, 3 and 4 wire resistance
thermometer devices |
| Ohms range |
0 to 600Ω 3- or 4-wire lead compensation |
| Hi Ohms range |
0 to 5kΩ 3- or 4-wire lead compensation |
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| Pot range |
5% to 95% ‘rotation’ of 100Ω to 5kΩ pot |
| Resolution |
Better than 0.001% of range |
| Linearity |
Better than 0.003% of range |
| Input filtering |
OFF to 999.9 seconds |
| Input accuracy |
Electrical input factory calibrated to
better than
0.1% of reading |
| System isolation |
Reinforced, 264V ac max |
| Channel isolation |
Reinforced, 264V ac max between thermocouple
channels |
| Functional |
264V ac max between RTD, volts and mA |
| Series Mode Rejection |
60dB (50Hz to 60Hz, 1mA rms) |
| Common Mode Rejection |
120dB (50Hz to 5kHz, 50V rms) |
| Current consumption |
100mA max |
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| TC Input specification |
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| Linearization types |
J, K, L, R, B, N, T, S, C, PL2, PT100,
Linear, SqRoot, plus custom |
| CJC System |
Measured by RTD fitted on Terminal Unit |
| CJC Accuracy |
±0.5°C, over -10°C to +70°C |
| CJC Rejection |
Better than 30:1 |
| Initial accuracy |
±1°C or ±0.2% of reading whichever is
greater
(standard thermocouples) |
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2500M/AI3 - Three channel analogue input |
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Provides three isolated current input channels specifically designed to meet the
requirements of modern two wire transmitters. Each channel has its own
isolated 24V supply for 3-wire transmitter excitation. Each channel is protected against short circuit (with 24V dc supply on) and
utilizes a sophisticated trip and try system where the module senses over current
and cuts the power, after a period the circuit checks for continued circuit
malfunction. The module can be optionally fitted with disconnects to allow isolation of an
individual input to allow work on the loop to continue safely.
| No of channels |
3 |
| Input range |
-28mA to +28mA |
| Resolution |
Better than 1uA (16 bits with 1.6 second
filter
time) |
| Linearity |
Better than 10uA |
| Initial accuracy |
Factory calibrated to better than ±0.1% of
reading |
| Input filtering |
OFF to 999.9 seconds |
| Burden resistance |
100Ω nom, 50mA max current |
| Channel PSU |
22 to 25V dc, current limited 30mA nom,
self-resetting |
| System isolation |
Reinforced, 264V ac max |
| Channel isolation |
Functional, 50V ac max |
| Current consumption |
100mA max |
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| 2500M/AI4 - Four channel analogue
input |
This analogue input module is used to monitor analogue signals from a wide
range of plant sensors. The mA and TC inputs each require the appropriate
Terminal Unit.
| No of channels |
4 |
| Input types |
TC, mV, mA, Pyrometer |
| mV range |
-150mV to +150mV at input impedance >100MΩ |
| mA range |
-22mA to +22mA with 5Ω burden in the
Terminal Unit |
| Resolution |
Better than 0.001% of range |
| Input filtering |
OFF to 999.9 seconds |
| Initial input accuracy |
Electrical Input Factory Calibrated to
better
than 0.1% of reading |
| System Isolation |
Reinforced, 264V ac max |
| Channel isolation |
Functional, 264V ac max separating Ch1 and
Ch2 from Ch3 and Ch4 |
| Series Mode Rejection. |
60dB (50Hz to 60Hz, 1mA r.m.s) |
| Common Mode Rejection |
120dB (50Hz to 5kHz, 50V r.m.s) |
| Current consumption |
100mA max |
| TC Input specification |
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| Linearization types |
J, K, L, R, B, N, T, S, C, PL2, linear,
SqRoot,
plus custom |
| CJC System |
Measured by RTD fitted on Terminal Unit |
| CJC Accuracy |
±0.5°C, over -10°C to +70°C |
| CJC Rejection |
Better than 30:1 |
| Initial accuracy |
±1°C or ±0.2% of reading whichever is
greater (standard thermocouples) |
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