Analog Input/Output Units | DSAX 452 | ABB

Technical Specifications

This is a combination unit for 14 analog inputs and 6 analog outputs for applications which require considerable accuracy. You can ground the transducer and load if the difference in potential between the load ground and the DSAX 452 ground is within the specification. The equivalent resistance caused by the ground voltage drop and the load resistance concerned together is not to exceed 650 Ω with a current signal, ≤ 20 mA. Both inputs and outputs can suppress moderate CMV in the range ±10V for voltage input and ±20 V for current input. This means, in practice, that you can ground the transducer and load freely within a geographically limited area in which the difference in ground potential is within the specification.

Troubleshooting & Comissioning Checklist

Station Address Switches: Set the rotary or DIP address switches (located under the top flip-lid) to the correct hardware ID allocated in your 800xA for Advant Master Configuration.
Input Configuration Jumpers: Position the internal hardware jumpers for each of the 14 channels to match the target signal type: Differential vs. Single-Ended, and Current (±20mA) vs. Voltage (±10V).
Wiring Integrity: Check that all two-wire field connections are tightened properly directly onto the built-in terminals without external distribution blocks.

Field Engineering Considerations

Output Loading Constraints: The 6 unipolar analog outputs (10-bit resolution) deliver current (0 to +20 mA) or voltage (0 to +10 V) signals.
Built-In Monitoring: The module natively monitors for local power loss, execution of startup self-tests, and communication drops across the fieldbus. Engineering logic in the database elements should be mapped to capture these device status bytes for diagnostics.
MasterFieldbus (MFB) Integration: The unit communicates back to the Advant Controller (e.g., AC 450) over the proprietary MasterFieldbus SDB network. Ensure proper station addressing is configured on the unit's DIP switches to prevent address conflicts on the bus.

Technical FAQ

Q: Which system does this module belong to?
A:It belongs to the S400 Remote I/O family. It provides distributed analog communication capabilities for ABB Advant OCS (Open Control System) controllers like the AC410, AC450, and MasterPiece 200 units.

Q: How is the DSAX 452 mounted or terminated?
A:The DSAX 452 acts as the main electronic basic unit. It is paired with a specific termination unit block, typically the TU401 unipolar connection unit, to route field wiring securely.

Q: What is the lifecycle and migration path for this module?
A:Because the S400 I/O system is considered a legacy series, ABB Ability System 800xA offers an official modernization path. Customers can replace legacy S400 setups by evolving them directly into the newer S800 I/O platform, which utilizes modernized termination and module alternatives.

Q: Do you supply brand-new, original parts or second-hand refurbished items?

A: Our stock consists of Original New items; all products undergo quality inspection to ensure they are fully functional.

Q: What guarantees are included with the shipment?
A: All items in stock are tested by engineers, packed in professional ESD packaging, and shipped via express logistics with a global delivery time of 24–48 hours.

Q: How long does global shipping take?
A: Stock items are typically dispatched within 24 hours. Shipments are sent via DHL or FedEx Express, taking approximately 3–5 days to reach Asia, 4–6 days to Europe and the Middle East, and usually arriving within a week in major industrial regions worldwide.

Q: If the model I need is not listed on the website, can I request a quote?
A: Yes. We hold over 200,000 SKUs of industrial spare parts in stock, and many long-tail models are not listed in full. You can send us an RFQ (Request for Quote) directly, and we will provide wholesale pricing promptly.

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