Description
Product Overview
The ABB 07AI90-S GJR5251200R0202 is a safety-related analog input module designed for ABB Advant Controller 31-S (AC31-S) automation systems. It acquires current signals from field instruments and makes the measured values available to the controller over the CS31 safety bus. With four 4–20 mA input channels, the module can support process measurements such as pressure, flow, level, and temperature transmitters that provide compatible current-loop outputs. ABB product information identifies the 07AI90-S as a safety-related distributed I/O module, rather than a general-purpose analog input card.
One important feature is its safety-oriented signal evaluation. The available technical description explains that input signals are processed through a dual-channel evaluation arrangement. It is designed to distinguish certain field-signal faults, including wire breaks and short circuits, and to detect specified single faults that can trigger a safe shutdown. These functions depend on the approved safety configuration, connection method, and engineering rules of the AC31-S system. Installing the module alone does not establish a safety-rated application; the complete control system must be designed and validated for its intended safety function.
For maintenance and procurement, verify the complete 07AI90-S GJR5251200R0202 designation and confirm that the existing controller uses the compatible CS31 safety-bus architecture. The published specifications list a 24 VDC supply, four 4–20 mA inputs, 12-bit resolution, and an operating temperature range of 0°C to +55°C. Do not confuse this model with similarly numbered standard I/O modules or assume it is interchangeable with a nonsafety 07AI-series device. Before commissioning a replacement, validate the field wiring, channel configuration, fault response, and safety application according to the applicable ABB documentation.
Product Introduction
The 07AI90-S is intended for applications where analog process measurements are acquired within an ABB AC31-S safety-related control architecture. Its four current-input channels provide the interface between compatible field transmitters and the safety-related controller. The module communicates through the CS31 system bus, which is electrically isolated from the module’s other circuitry according to the available product description.
When sourcing a replacement, inspect the product label, order code, terminal arrangement, and physical condition. Confirm that the installed system documentation specifies this exact safety-related variant. For used or refurbished equipment, request documented testing and clear disclosure of repair history. After installation, perform the checks required by the site’s safety lifecycle and commissioning procedure; a basic power-up test is not sufficient to demonstrate correct safety behavior.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 07AI90-S |
| Order Number | GJR5251200R0202 |
| Manufacturer | ABB |
| Product Type | Safety-related analog input module |
| Automation Platform | Advant Controller 31-S / AC31-S |
| Number of Analog Inputs | 4 |
| Input Signal | 4–20 mA |
| Resolution | 12-bit, as listed in ABB product data |
| Supply Voltage | 24 VDC |
| Fieldbus Interface | CS31 safety-bus slave |
| Bus Isolation | Electrically isolated from other module circuitry, per product description |
| Mounting | DIN rail, TH35-7.5 or TH35-15 |
| Terminal Type | Pluggable screw terminals |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | −25°C to +75°C |
| Protection Rating | IP20 |
| Maximum Operating Altitude | 2,000 m |
| Cable Cross-Section | 0.08–1.5 mm², as listed in product data |
| Communication Protocol | CS31 bus |
| Safety Application | Requires compatible AC31-S hardware, configuration, and validation |
Specifications are based on the available product data and technical description. Verify the applicable ABB manual and the actual nameplate before using them as commissioning or acceptance criteria.
07AI90-S-GJR5251200R0202
Related Products
These products belong to related ABB Advant Controller 31 or distributed I/O families; they are not necessarily interchangeable.
- 07KT94-S — AC31-S central processing unit referenced in the 07AI90-S system description.
- 07AI90 — Related analog input designation; verify safety classification and complete order code before considering it as an alternative.
- 07DI92 — Digital input module in the broader distributed I/O family; confirm the exact variant.
- 07DO90 — Digital output module family; verify system and safety compatibility.
- CS31 system bus components — Required communication infrastructure for compatible distributed I/O.
Frequently Asked Questions
Q1: What is the ABB 07AI90-S GJR5251200R0202 used for?
It acquires four 4–20 mA analog signals in ABB Advant Controller 31-S safety-related automation systems and communicates them over the safety bus.
Q2: How many analog inputs does it provide?
The module provides four analog input channels, specified for 4–20 mA signals. Confirm the transmitter wiring and input requirements against the installation manual.
Q3: What power supply does the module require?
The listed supply voltage is 24 VDC. Check the permitted supply range, grounding, and wiring requirements in the applicable ABB documentation before energizing the module.
Q4: Is the 07AI90-S a safety-related module?
Yes. ABB product data identifies it as a safety-related analog input modulr . The safety integrity of an installed function depends on the complete system design, approved configuration, and validation—not solely on the module designation.
Q5: Can it replace a standard 07AI90 module?
Do not assume so. The -S designation identifies the safety-related variant. Verify the exact hardware, system architecture, approvals, and replacement guidance before substituting another model.
Q6: What environmental limits should be considered?
The listed operating range is 0°C to +55°C, with storage from −25°C to +75°C. The module is specified as IP20, so the cabinet and installation must provide appropriate environmental protection.
Q7: What testing should be requested for a refurbished unit?
Request identification and condition records, channel-level input checks, bus communication verification, and evidence of any applicable safety-related tests. Any replacement in a safety function should also undergo the site’s prescribed validation and proof-testing procedures.
Procurement Recommendation
For the ABB 07AI90-S GJR5251200R0202, exact model and safety-variant matching are the priorities. Confirm compatibility wite controller and safety bus, verify the four 4–20 mA channels, and obtain traceable testing documentation. Because this module may participate in safety-related functions, do not treat a generic analog-input substitute or a simple power-up test as sufficient evidence of suitability for service.
