ABB EI813F
The ABB EI813F is a part of the Freelance DCS (Distributed Control System) and the AC 800F controller family. It is an 8-channel, analog input module designed for high-precision measurement of signals from the field.
Summary Overview
Module Type: Analog Input (AI)
Number of Channels: 8
Electrical Isolation: 500 V AC between field side and system side.
Common Mode Voltage: 75 V DC (with 500 V AC isolation)
Power Supply: Supplied via the internal mounting bus from the power supply module.
Typical Applications: Connecting analog sensors like Pt100/1000 RTDs, thermocouples, and voltage/current transmitters.
Detailed Technical Parameters
1. General Data
| Parameter |
Value |
| Product Family |
Freelance / AC 800F |
| Module Type |
Analog Input |
| Order Code / Article Number |
EI813F (Note: Always confirm the exact code with ABB or your supplier, as suffixes may vary) |
| Number of Channels |
8 |
| Electrical Isolation |
500 V AC (between field side and system side) |
| Connection |
Via a removable terminal unit (e.g., TU813F or similar) |
| Module Width |
1 (single-width module, occupies one slot in the rack) |
2. Input Specifications (Channel-by-Channel)
Each channel can be individually configured for different signal types.
| Signal Type |
Measuring Range |
Input Impedance |
Resolution |
Accuracy (Typical, @ 25°C) |
| Voltage |
±10 V |
> 1 MΩ |
15 bits |
±0.1% of range |
| Current |
0/4 - 20 mA |
50 Ω (internal) |
15 bits |
±0.1% of range |
| Current |
±20 mA |
50 Ω (internal) |
15 bits |
±0.1% of range |
| Resistance (RTD) |
Pt100, Pt1000, Ni100, etc. |
- |
15 bits |
±0.2°C (for Pt100) |
| Thermocouple (TC) |
J, K, L, T, E, N, R, S, B, C |
> 1 MΩ |
15 bits |
±1°C (varies by type and range) |
Note on RTD/TC: The module provides the necessary sensor excitation (current source for RTDs) and features internal cold junction compensation for thermocouples.
3. Performance Characteristics
Conversion Time: Varies per channel and configuration (filter setting). Typically in the range of 50-100 ms per channel.
Update Time: Depends on the number of active channels and the configured filter time.
Common Mode Rejection (CMR): > 90 dB @ 50/60 Hz
Normal Mode Rejection (NMR): > 60 dB @ 50/60 Hz
Diagnostics: The module features comprehensive diagnostics including:
Wire break (for current signals)
Sensor break (for RTD and TC signals)
Underrange/Overrange detection
Module hardware failure
4. Environmental & Mechanical Conditions
Operating Temperature: 0 to +60 °C (32 to 140 °F)
Storage Temperature: -40 to +85 °C (-40 to 185 °F)
Relative Humidity: 5% to 95% (non-condensing)
Altitude: Up to 2000 m (6560 ft) without derating
5. Required Accessories
Terminal Unit: Requires a matching terminal unit for wiring, such as the TU813F. This unit plugs directly into the module and provides the screw terminals for field connections.
Rack: Must be installed in a compatible Freelance rack (e.g., RU824F).
Power Supply: The rack must be powered by a compatible PS-series power supply module.
Key Features and Applications
High Density: 8 channels in a single module slot save space in control cabinets.
High Accuracy: Suitable for precise process measurements in industries like chemical, pharmaceutical, water treatment, and manufacturing.
Flexibility: Each channel is individually configurable for a wide variety of sensor types, reducing the need for different module types in your spare parts inventory.
Integrated System: Seamlessly integrates with the ABB Freelance DCS, programmed and configured via the Freelance Engineering tool.
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