ABB PM 904F 3BDH001002R0001 Freelance AC 900F Controller CPU Module

Frequently Asked Questions (FAQ)

Q1: What is the maximum number of I/Os supported by the PM 904F?
A1: The PM 904F supports up to 1,500 I/O points, making it ideal for mid-to-large automation systems.

Q2: Is redundancy supported in this CPU module?
A2: Yes, the PM 904F supports optional redundancy with a switch-over time of 500 ms.

Q3: What communication protocols are natively supported?
A3: It supports Ethernet-based protocols such as Modbus TCP and IEC 60870-5-104.

Q4: Can I use this module in high-humidity environments?
A4: Yes, it supports up to 93% relative humidity (non-condensing) and is G3 compliant for corrosion protection.

Q5: What software version is required to operate this CPU?
A5: A software version from 2019 or higher is mandatory for operation.

Q6: Are the TD 951F display and TA 951F battery included?
A6: No, these accessories must be ordered separately.

Q7: How is data backed up in case of power loss?
A7: A lithium battery (TA 951F) is used for battery-buffered SRAM backup.

Q8: Does the PM 904F include an internal power supply?
A8: It requires an external 24 V DC power supply; it does not include an internal PSU.

3BDH001002R0001 ABB CPU Module Freelance AC 900F Controller PM 904F

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