ABB 07AI91 WT91 GJR5251600R4202 Analog Input Module

Manufacturer：ABB

Product Number：07AI91 WT91 GJR5251600R4202

Product Type：Analog Input Module

Origin：Sweden (SE)

Dimensions：120 × 140 × 85 mm

Weight：0.45 kg

Frequently Asked Questions (FAQ)

Q1: What types of signals can the ABB 07AI91 WT91 module handle?
A1: The module supports a variety of input types including voltage signals (±10 V, ±5 V, ±500 mV, ±50 mV), current signals (0…20 mA, 4…20 mA with a 250 Ω shunt), Pt100/Pt1000 RTDs, and thermocouples of types J, K, and S.

Q2: Can I connect Pt100 and Pt1000 sensors simultaneously?
A2: Yes, Pt100 and Pt1000 sensors can be operated simultaneously by assigning one type to the upper terminal bank and the other type to the lower terminal bank.

Q3: What is the resolution of the analog input values?
A3: The input resolution is 12-bit plus sign, which ensures high accuracy for analog signal acquisition.

Q4: How is error detection performed in this module?
A4: The module includes built-in diagnostics for open circuit detection, out-of-range signals, internal errors, and transmission errors. Errors are indicated via the red LED and communicated to the central unit.

Q5: What is required to measure current signals such as 4…20 mA?
A5: An external 250 Ω shunt resistor is required between input terminals to measure 4…20 mA or 0…20 mA signals using voltage input ranges.

Q6: What kind of electrical isolation is implemented?
A6: The CS31 system bus is electrically isolated from the analog input section, ensuring signal integrity and protection.

Q7: What happens if a thermocouple wire breaks?
A7: A wire break results in the numerical value -32767 being displayed and an error message is generated and transmitted over the CS31 system bus.

Q8: What should be done with unused input channels?
A8: Unused channels must be short-circuited. For Pt100 and Pt1000 channels, it is recommended to bridge them with 120 Ω and 1200 Ω resistors respectively to avoid underflow error messages.

07AI91 WT91 ABB Analog Input Module GJR5251600R4202

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