1. General Introduction
The AI893 Analog Input Module has 8 channels. The module includes Intrinsic Safety protection components on each channel for connection to process equipment in hazardous areas without the need for additional external devices.
The module can be configured for either 2 or 3-wire RTD sensors or for TC sensors. In TC mode, channel 8 be used for Cold Junction (ambient) temperature measurements, thus serving as CJ-channel for channel 1...7. The junction temperature may be measured locally on the MTUs screw terminals, or on a connection unit distant from the device. The cold junction temperature is measured with a 3-wire Pt 100 sensor. Alternatively, a fix junction temperature for the module may be set by the user (as parameter). Channel 8 may be used in the same manner as channel 1-7 when no CJ-temperature measurement is needed.
TU890 and TU891 Compact MTU can be used with this module and it enables three wire connections to the process devices without additional terminals. TU890 for Ex applications and TU891 for non Ex applications.
2. Specification of AI893
General info | |
Type | Analog Input |
Signal specification | RTD or TC |
Article number | 3BSC690141R1 |
Number of channels | 8 |
Signal type | Differential |
HART | No |
SOE | No |
Redundancy | No |
High Integrity | No |
Intrinsic safety | Yes |
Mechanics | S800 |
Detailed data | |
Resolution | 15 bit + sign |
Input impedance | >10 MΩ |
Isolation | GroupWise isolated from ground |
Error | TC/mV: <20 μV ; RTD (0-400 Ω): <0.1 Ω ; RTD (0-4000 Ω): <1 Ω |
Temperature drift | TC/mV: <20 μV/10°C ; RTD (0-400 Ω): <0.1 Ω/10°C ; RTD (0-4000 Ω): <1 Ω/10°C |
Update cycle time | (no of active channels) x 125 + 125 ms |
Common mode voltage input | +/- 5V |
CMRR, 50Hz, 60Hz | >100 dB |
NMRR, 50Hz, 60Hz | >80 dB |
Rated insulation voltage | 50 V |
Dielectric test voltage | 500 V a.c. |
Power dissipation | 0.5 W |
Current consumption +5 V Module bus | Typ. 90 mA, Max. <125 mA |
Diagnostics | |
Front LED’s | F(ault), R(un), W(arning) |
Supervision | Open circuit, Short circuit for RTD |
Environmental and certification | |
CE mark | Yes |
Electrical safety | IEC 61131-2, cFMus |
Hazardous location | ATEX/IECEx Zone 2 with interface to Zone 0, cFMus C1, Div 2/Zone 2 with interface to C1, C2, C3 Div 1/Zone 0 |
Marine certification | - |
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 | TU890, TU891 |
Keying code | BA |
Intrinsic Safety parameters | |
U0 (Groups CENELEC USA) | IIC |
I0 (Groups CENELEC USA) | IIB |
P0 (Groups CENELEC USA) | IIA |
U0 - C0 (uF) | 1.41 |
U0 -L0 (mH) | 88 |
U0 -L/R (uH/O) | 586 |
I0 - C0 (uF) | 9 |
I0 -L0 (mH) | 352 |
I0 -L/R (uH/O) | 2347 |
P0 - C0 (uF) | 36 |
P0 -L0 (mH) | 706 |
P0 -L/R (uH/O) | 4707 |
Dimensions | |
Width | 45 mm (1.77”) |
Depth | 102 mm (4.01”), 111 mm (4.37”) including connector |
Height | 119 mm (4.7”) |
Weight | 0.2 0.16 kg (0.35 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 |
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Fax: +971558915956
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