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ABB

ABB GJR5251600R0202 07AI91 AC31 Analog Input Module

SKU 07AI91 GJR5251600R0202

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12-month warranty
Free returns within 30 days

Manufacturer: ABB
Product No.: 07AI91 GJR5251600R0202
Origin Sweden
Product Type: Analog Input Module
Barcode: 85389091
Payment: T/T, Western Union
Weight: 0.48 kg
Dimensions: 120 x 140 x 85 mm
Shipping port: Xiamen
Warranty: 12 months

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

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Product Description

Description

An analog input module designed for remote data acquisition on the CS31 system bus within ABB AC31 automation systems. The ABB 07 AI 91 module, also referenced as 07AI91, provides eight configurable analog input channels for voltage, current, temperature sensor, and thermocouple measurement applications. The order number GJR5 2516 00 R0202 is also commonly referenced in maintenance databases and procurement systems as GJR5251600R0202.

The module supports configurable measurement ranges including +/-10 V, +/-5 V, +/-500 mV, +/-50 mV, 4...20 mA, Pt100, Pt1000, and thermocouple types J, K, and S with linearization. Channel configuration is performed in pairs using DIL switches located beneath the housing cover.
Communication with the controller is performed through the electrically isolated CS31 system bus using the EIA RS-485 transmission standard. The module incorporates self-calibration functions, diagnostic monitoring, open-circuit detection, transmission error detection, and local LED status indication.
The module is suitable for process monitoring, temperature measurement systems, industrial instrumentation, utility automation, machine control systems, and distributed analog signal acquisition applications requiring high-resolution analog input processing.

Features

8 configurable analog input channels
CS31 system bus communication
EIA RS-485 interface standard
12-bit resolution with sign
Supports voltage, current, RTD and thermocouple inputs
Pt100 and Pt1000 linearization
Thermocouple types J, K and S linearization
Configurable 50 Hz or 60 Hz line frequency suppression
Open-circuit detection
Range exceed detection
Internal self-calibration function
Electrically isolated CS31 bus interface
17 LED diagnostic and status indicators
DIL-switch configuration

Applications

Process instrumentation systems
Temperature monitoring applications
Industrial furnace control systems
Utility and infrastructure automation
Water and wastewater facilities
Machine condition monitoring
Distributed analog signal acquisition
Manufacturing process control
Energy management systems
Sensor interface applications

Ordering Information

Model	Order Number
07 AI 91 Analog Input Module	GJR5 2516 00 R0202

Technical Specifications

Parameter	Specification
Manufacturer	ABB
Model	07 AI 91
Alternate Model	07AI91
Order Number	GJR5 2516 00 R0202
Alternate Part Number	GJR5251600R0202
Product Type	Analog Input Module
Series	AC31
Communication Bus	CS31 System Bus
Interface Standard	EIA RS-485
Analog Input Channels	8
Resolution	12 bit + sign
Rated Supply Voltage	24 V DC
Maximum Current Consumption	0.15 A
Maximum Power Dissipation	3 W
Reverse Polarity Protection	Yes
Operating Temperature	0 to 55 degC
Input Overvoltage	Max. +/-30 V
Input Resistance (Voltage)	>1 MOhm
Line Frequency Suppression	50 Hz, 60 Hz or none
Update Time (50/60 Hz suppression)	Typical 100 ms
Update Time (No suppression)	Typical 30 ms
Update Time (Thermocouples)	Typical 150 ms
Electrical Isolation	CS31 bus interface isolated from module electronics
Width	120 mm
Height	140 mm
Depth	85 mm
Weight	450 g
Country of Origin	Not specified in provided documentation

Supported Input Types

Signal Type	Measurement Range
Voltage Input	+/-10 V
Voltage Input	+/-5 V
Voltage Input	+/-500 mV
Voltage Input	+/-50 mV
Current Input	4...20 mA (external 250 Ohm resistor)
Current Input	0...20 mA via +/-5 V range and external 250 Ohm resistor
RTD Input	Pt100 with linearization
RTD Input	Pt1000 with linearization
Thermocouple	Type J
Thermocouple	Type K
Thermocouple	Type S

Temperature Measurement Specifications

Parameter	Specification
Pt100 Range	-50 to +400 Celsius
Pt1000 Range	-50 to +400 Celsius
Thermocouple J Range	0 to +1200 Celsius
Thermocouple K Range	0 to +1372 Celsius
Thermocouple S Range	0 to +1600 Celsius
Thermocouple Resolution	1 LSB = 0.4 Celsius
Evaluation Error	+/-0.5% of full scale

Connections/Interfaces

Connector Pin	Function
CS31 System Bus	Communication Interface
L+	24 V DC Supply
M	0 V Supply Reference
AGND	Analog Ground Reference
EA00-EA07	Analog Input Channels
SHIELD	Cable Shield Connection

Installation Guidelines

Install vertically with terminals facing upward and downward.
Mount on DIN EN 50022-35 rail or secure using four M4 screws.
Use shielded cables for analog signal wiring.
Ground cable shields at the cabinet entry point.
Ensure all temperature and voltage sensors are electrically isolated from their mounting environment.
Bridge unused input channels according to sensor type requirements.
Configure measurement ranges using the onboard DIL switches before commissioning.
Maintain unobstructed airflow around the module for natural convection cooling.
Integrate the process power supply grounding into the overall control system grounding concept.

Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

FAQ

How are the analog input channel measurement ranges and sensor types configured on the ABB 07 AI 91 module?

Channel configuration on the 07 AI 91 module is performed in pairs using physical DIL switches located beneath the secure housing cover. Users can hardware-configure the pairs to accept specific signal types including +/-10 V, +/-5 V, +/-500 mV, +/-50 mV, 4...20 mA, Pt100, Pt1000, and thermocouple types J, K, and S.

Does the 07AI91 module feature internal shunt resistors for direct current loop measurements?

No, the module does not include built-in internal measuring shunts for current loops. For standard 4...20 mA input signals, an external 250 Ohm precision resistor must be connected across the input terminals. For 0...20 mA signals, an external 250 Ohm resistor is also required, and the corresponding channel must be configured to the +/-5 V range.

Is there electrical isolation between individual analog input channels on the module?

No, the eight analog input channels (EA00 to EA07) are non-isolated from one another and share a common internal analog ground node designated as AGND. However, the critical CS31 system bus interface is fully electrically isolated from the internal module electronics to protect against high-voltage spikes on the field network.

How does modifying the line frequency suppression affect the module update time?

The typical update time varies based on the analog signal filtering settings. When 50 Hz or 60 Hz line frequency suppression is active, the update time is typically 100 ms. If no line frequency suppression is configured, the update time drops to a faster 30 ms. For specialized thermocouple measurements involving linearization, the typical update time is 150 ms.

What localized diagnostic capabilities are available on the ABB 07 AI 91 hardware interface?

The module features an onboard array of 17 LED diagnostic and status indicators. The internal hardware monitoring system can actively detect open-circuit (broken wire) faults on RTD, thermocouple, and 4...20 mA loops, identify range exceed conditions, track transmission errors over the RS-485 CS31 bus, and verify proper 24 V DC power supply status.

What are the specific measurement ranges and resolution details for temperature sensor applications?

The module supports linearized temperature processing across specified ranges: Pt100 and Pt1000 sensors monitor from -50 to +400 Celsius; Type J thermocouples range from 0 to +1200 Celsius; Type K thermocouples range from 0 to +1372 Celsius; and Type S thermocouples range from 0 to +1600 Celsius. The hardware resolution for thermocouple tracking is 1 LSB = 0.4 Celsius, with a total evaluation error restricted to +/-0.5 percent of full scale.

What installation guidelines must be followed regarding unused analog channels and sensor environment?

To maintain precision and prevent floating voltage noise from affecting active readings, all unused input channels must be bridged or shorted according to the specific configuration block settings. Additionally, because channels share a common AGND, all external temperature and voltage sensors must be strictly electrically isolated from their mechanical mounting environments to eliminate grounding loop currents.

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