1. General Introduction
The AI845 Analog Input Module for single or redundant applications. The module has 8 channels. Each channel can be either a voltage or current input when MTU TU844 or TU845 is used; when other MTUs are used all channels become voltage or current inputs.
The voltage and current input is able to withstand an overvoltage or under voltage of at least 11 V d.c. The input resistance for voltage input is greater than 10 M ohm and the input resistance for current input is 250 ohm.
The module distributes the external HART compatible transmitter supply to each channel. This adds a simple connection to distribute the supply to 2-wire or 3-wire transmitters. The transmitter power is supervised and current limited
2. Specification of AI845
General info | |
Type | Analog Input |
Signal specification | 0..20mA, 4..20 mA, 0..5 V, 1..5 V |
Article number | 3BSE023675R1 |
Number of channels | 8 |
Signal type | Unipolar single ended |
HART | Yes |
SOE | No |
Redundancy | Yes |
High Integrity | No |
Intrinsic safety | No |
Mechanics | S800 |
Detailed data | |
Resolution | 15 bits |
Input impedance | 10 MΩ (voltage input) 250 Ω (current input incl. PTC) |
Isolation | GroupWise isolated from ground |
Under/over range | 0 / +15% |
Error | Max. 0.1% |
Temperature drift | Max. 50 ppm/°C. 5 ppm/°C, Max. 7 ppm/°C |
Input filter (rise time 0-90%) | 290 ms |
Update cycle time | 10ms |
Maximum field cable length | 600 meters (656 yards) |
Max input voltage (non destructive) | 11 V d.c. |
NMRR, 50Hz, 60Hz | >40 dB |
Rated insulation voltage | 50 V |
Dielectric test voltage | 500 V a.c. |
Power dissipation | 3.5 W |
Current consumption +5 V Module bus | 100 mA |
Current consumption +24 V Module bus | 50 mA |
Current consumption +24 V external | Max. 265 mA (22 mA + transmitter current * 1.32) |
Diagnostics | |
Front LED’s | F(ault), R(un), W(arning) |
Supervision | Module error: analog read back, reference voltage, internal power supply, checksum, watchdog and memory error Internal channel error: low pass filter´, multiplexer, test channel error External channel error: external power supply low, transmitter power, external shunt error |
Status indication of supervision | Module Error, Module Warning, Channel error |
Environmental and certification | |
CE mark | Yes |
Electrical safety | IEC 61131-2, UL 508 |
Hazardous location | C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2 |
Marine certification | BV, DNV-GL, LR |
Protection rating | IP20 according to IEC 60529 |
Corrosive atmosphere ISA-S71.04 | G3 |
Climatic operating conditions | 0 to +55 °C (Storage -25 to +70 °C), RH=5 to 95 % no condensation, IEC/EN61131-2 |
Pollution degree | Degree 2, IEC 60664-1 |
Mechanical operating conditions | IEC/EN 61131-2 |
EMC | EN 61000-6-4 and EN 61000-6-2 |
Overvoltage categories | IEC/EN 60664-1, EN 50178 |
Equipment class | Class I according to IEC 61140; (earth protected) |
Max ambient temperature | 55 °C (131 °F), for vertical mounting 40 °C (104 °F) |
RoHS compliance | DIRECTIVE/2011/65/EU (EN 50581:2012) |
WEEE compliance | DIRECTIVE/2012/19/EU |
Comp ability | |
Use with MTU | TU810, TU812, TU814, TU818, TU830, TU833, TU835, TU838, TU844, TU845,TU854 |
Keying code | CC |
Dimensions | |
Width | 45 mm (1.77”) |
Depth | 102 mm (4.01”), 111 mm (4.37”) including connector |
Height | 119 mm (4.7”) |
Weight | 0.23 kg (0.51 lbs.) |
3. Selection table of I/O Modules
Name | HART | High Integrity | Intrinsic safety | Mechanics | Redundancy | SOE | Type |
AI801 | No | No | No | S800L | No | No | Analog Input |
AI810 | No | No | No | S800 | No | No | Analog Input |
AI815 | Yes | No | No | S800 | No | No | Analog Input |
AI820 | No | No | No | S800 | No | No | Analog Input |
AI825 | No | No | No | S800 | No | No | Analog Input |
AI830A | No | No | No | S800 | No | No | Analog Input |
AI835A | No | No | No | S800 | No | No | Analog Input |
AI843 | No | No | No | S800 | Yes | No | Analog Input |
AI845 | Yes | No | No | S800 | Yes | No | Analog Input |
AI880A | Yes | Yes | No | S800 | Yes | No | Analog Input |
AI890 | No | No | Yes | S800 | No | No | Analog Input |
AI893 | No | No | Yes | S800 | No | No | Analog Input |
AI895 | Yes | No | Yes | S800 | No | No | Analog Input |
AO801 | No | No | No | S800L | No | No | Analog Output |
AO810V2 | No | No | No | S800 | No | No | Analog Output |
AO815 | Yes | No | No | S800 | No | No | Analog Output |
AO820 | No | No | No | S800 | No | No | Analog Output |
AO845A | Yes | No | No | S800 | Yes | No | Analog Output |
AO890 | No | No | Yes | S800 | No | No | Analog Output |
AO895 | Yes | No | Yes | S800 | No | No | Analog Output |
