Description
Product overview
The ABB 07AI91E is associated with the AC31 analog input module family, which gathers field signals for processing by a controller over the CS31 system bus. The documented 07AI91 family supports eight analog inputs with 12-bit resolution and can accommodate specified voltage, current, Pt100/Pt1000, and thermocouple signals. The exact ordering code matters: ABB documentation identifies 07AI91, order number GJR5251600R0202, while third-party listings use 07AI91E as a variant designation. Confirm the complete nameplate before applying the standard 07AI91 specifications to a particular unit.
For maintenance, the module’s value lies in collecting process measurements from compatible instruments, including temperature sensors and standard analog transmitters. Correct replacement depends on the input type configured for each channel, the wiring arrangement, and the controller’s CS31 setup. A module that physically fits may still be unsuitable if its order code, terminal arrangement, or supported sensor configuration differs. Before removing the installed unit, record the wiring and channel settings, then validate readings against a known signal after replacement.
Product introduction
The 07AI91E is intended for analog signal acquisition in legacy ABB AC31 automation systems. Its eight-channel architecture can reduce the need for separate modules for different supported sensor types, but each channel must be wired and configured for the actual field signal.
When sourcing a replacement, verify the order number and suffix on the module label. For used or refurbished stock, request terminal-condition photographs and a functional test report that identifies which input types and channels were checked.
Key technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model designation | 07AI91E |
| Related documented module | 07AI91 |
| Documented order number for 07AI91 | GJR5251600R0202 |
| Product family | Advant Controller 31 (AC31) |
| Product type | Analog input module |
| Number of analog inputs | 8 |
| Resolution | 12-bit |
| Voltage input ranges | ±50 mV, ±500 mV, ±10 V |
| Current input ranges | 0–20 mA; verify exact variant support |
| Temperature sensors | Pt100 / Pt1000 |
| Thermocouple support | Types J, K, and S documented for the 07AI91 family |
| System communication | CS31 system bus |
| Supply voltage | 24 VDC |
| Typical mounting | Distributed / remote I/O installation; verify housing and mounting details |
| Terminal arrangement | Removable terminal blocks; confirm exact variant |
| Operating temperature | 0°C to +55°C reported for the 07AI91 family |
| Weight | Approximately 0.45 kg in ABB ordering data |
| Condition | Confirm new, used, refurbished, or untested status |
The technical values above are documented for the standard 07AI91 family and must not be assumed to apply to every 07AI91E suffix without checking its complete order number.
07AI91E
Related products
| Model | Relationship |
|---|---|
| 07AI91 (GJR5251600R0202) | Standard documented analog input module in the AC31 family |
| 07AI91-AD (1SAP800200R0010) | Newer AC31 adapter-series alternative; thermocouple support differs, so check application requirements |
| 07AC91 (GJR5252300R0101) | Configurable analog input/output module; different I/O functionality |
| 07KP90 | AC31 communication processor for RCOM protocols |
| 07KP93 | communication processor for Modbus |
| 07DC91 | Digital I/O module, not a direct analog-input replacement |
ABB’s replacement information identifies differences between the original 07AI91 and 07AI91-AD, including thermocouple support. Treat the adapter as a migration option requiring application checks, not an automatic equivalent.
Frequently asked questions
1. What is the ABB 07AI91E used for?
It is associated with ABB analog signal acquisition. The standard 07AI91 module accepts compatible analog and temperature-sensor inputs for processing by the controller.
2. How many channels does the standard 07AI91 have?
ABB documentation specifies eight analog inputs with 12-bit resolution. Confirm that the exact 07AI91E unit matches this standard module.
3. Does it support Pt100 and thermocouples?
The standard 07AI91 supports Pt100/Pt1000 and thermocouple types J, K, and S. Confirm the exact module variant and channel configuration before connecting sensors.
4. What power supply does it require?
The documented 07AI91 is rated for 24 VDC. Check the installed module’s nameplate and system wiring before energizing a replacement.
5. Can 07AI91E be replaced by 07AI91-AD?
Not without checking the application. ABB’s adapter information notes that the 07AI91-AD does not support thermocouples, so applications using those sensors may require a different solution.
6. What should be checked before ordering?
Verify the complete model and order number, terminal layout, supply rating, input types, channel wiring, and CS31 system configuration.
7. What testing should be requested for used stock?
Request inspection of terminals and connectors, power-up and diagnostic checks, and input tests using known voltage/current signals. If temperature sensors are used, request confirmation that the relevant sensor inputs were tested.
Procurement recommendation
For the ABB 07AI91E, confirm the exact order code before treating it as a standard 07AI91. The standard module’s eight-channel input specifications are documented, but the suffix alone is not enough to establish every electrical detail. Match the original label, confirm the field-sensor types, and obtain test evidence appropriate to the installed application.
