Description
- Model: 07AC91 F
- ABB Part Number: GJR5252300R0101
- Part Type: Analog I/O module
- System: ABB Advant Controller 31 / AC31-90
- I/O Capacity: 16 configurable analog I/Os
- Supply Voltage: 24 V DC
- Fieldbus: CS31 / RS-485
Technical Introduction
The ABB 07AC91 F (GJR5252300R0101) is a distributed automation I/O module for the ABB AC31-90 / Advant Controller 31 platform. ABB documentation identifies 07AC91 as a CS31 slave with onboard I/O and 16 configurable analog I/Os.
This is a legacy AC31 component, so replacement work should focus on the exact I/O configuration and CS31 system architecture rather than physical fit alone. The OEM documentation also identifies 24 V DC supply, RS-485/CS31 communications, pluggable screw terminals, and DIN-rail mounting.
Best Suited For
- ABB AC31-90 / Advant Controller 31 maintenance
- Replacement of obsolete 07AC91 I/O modules
- Legacy PLC spare inventory and system migration projects
Core Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Model | 07AC91 F |
| ABB Part Number | GJR5252300R0101 |
| Product Type | Distributed Automation Analog I/O Module |
| Controller Platform | PLC-AC31-90 / Advant Controller 31 |
| Fieldbus | CS31 |
| Fieldbus Interface | RS-485 |
| Number of Analog I/Os | 16 configurable |
| Primary Voltage | 24 V |
| Supply Voltage | 24 V DC |
| Terminal Type | Pluggable screw terminals |
| Mounting | DIN rail |
| Rail Standard | TH35-15 / TH35-7.5 according to IEC 60715 |
| Special Function | Thermocouple inputs |
| Order Multiple | 1 piece |
ABB 07AC91 F GJR5252300R0101
The OEM-derived product record identifies 07AC91 as a CS31 slave with 16 configurable analog I/Os and 24 V DC supply.
ABB’s later AC31 adapter documentation also confirms that the newer 07AC91-AD and 07AC91-AD2 replacement units were developed specifically to replace the original 07AC91, with the AD version corresponding to 8-bit operation and AD2 to 12-bit operation.
Field Engineer’s Tech Notes
- Check the I/O operating mode before substitution. The original 07AC91 has legacy operating modes, while ABB’s replacement devices distinguish between 8-bit and 12-bit operation. Do not assume an AD or AD2 replacement is configuration-neutral.
- Preserve the addressing and terminal configuration. Photograph the module’s switch/address settings and every field terminal before removal. A replacement can power up normally while still being unusable if the node configuration or analog channel assignment is wrong.
Adaptive QA & Testing Protocol
Testing starts with verification of the 07AC91 F / GJR5252300R0101 identification, hardware condition, terminal blocks, DIN-rail interface, and visible PCB components.
For a functional test, the module should be connected to an appropriate / test environment. Analog channels can then be checked using calibrated voltage/current or thermocouple simulation as applicable, while the communication path is verified for correct node recognition and I/O data exchange.
Test reports, inspection photographs, and available test videos can be provided upon request.
ABB 07AC91 F GJR5252300R0101
Buyer’s FAQ
Q: What system does ABB 07AC91 belong to?
A: It belongs to the ABB Advant Controller 31 / -90 distributed automation I/O family and operates as a slave.
Q: How many analog I/O channels does 07AC91 provide?
A: ABB documentation identifies 16 configurable analog I/Os.
Q: Is 07AC91 F the same part as GJR5252300R0101?
A: Available procurement records identify 07AC91 F GJR5252300R0101 together, so the complete marking should be used when sourcing the replacement.
Q: Is there a newer replacement for the original 07AC91?
A: Yes. ABB documentation identifies 07AC91-AD and 07AC91-AD2 as replacement devices for the original 07AC91, with different operating modes. Compatibility should be checked a
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