Mount the terminal unit
De-energize process voltage, secure ABB TU531 1SAP217200R0001 to the DIN rail or mounting surface, and lock it beside the preceding base.
ABBTERMINALProduct record
S500 · SCREW-TYPE TERMINAL UNIT
ABB TU531 1SAP217200R0001 S500 I/O Terminal Unit for 115/230 V AC and Relay Modules
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Product Details
ABB TU531 1SAP217200R0001 is an S500 I/O terminal unit for expansion modules that use 115/230 V AC inputs or 230 V AC relay outputs. It carries the field wiring, process-voltage connections and I/O-bus links while the active expansion module plugs into the terminal unit above them.
Forty screw terminals on ABB TU531 1SAP217200R0001 are assigned by the inserted I/O module, so the terminal map follows the selected module rather than the terminal unit alone. A 50-pole plug and two 38-pole plugs join the active module to the wired base, and mechanical locks hold the module after seating.
At each side of ABB TU531 1SAP217200R0001, the 10-pole I/O bus joins the preceding terminal base or terminal unit and passes the bus to the next position. This arrangement lets a module be removed without disturbing conductors that remain landed on the screw terminals.
02
Specification Summary
| Brand | ABB |
|---|---|
| Model | TU531 1SAP217200R0001 |
| Product Name | S500 I/O Terminal Unit for 115/230 V AC and Relay Modules |
| Country | Switzerland |
| Terminal Type | Screw type |
| Field Terminals | 40 |
| Supported Modules | S500 expansion modules with 115/230 V AC inputs or 230 V AC relay outputs |
| I/O Bus, Previous Side | 10-pole male |
| I/O Bus, Next Side | 10-pole female |
| Module Plugs | 1 × 50-pole and 2 × 38-pole |
| Module Retention | Two mechanical locks |
| Mounting | DIN rail or two wall-mounting holes |
| Replacement Wiring | Field wiring remains on terminal unit |
| Ordering Number | 1SAP217200R0001 |
03
Installation Highlights
ABB TU531 1SAP217200R0001 is installed as the passive field-wiring base before the matching S500 expansion module is seated.
Land conductors by module map
Use the terminal assignment for the exact inserted I/O module; the numbers on the terminal unit do not by themselves define input, output or relay function.
Seat and verify the module
Align all three module plugs, engage both mechanical locks, then check bus continuity and the field circuit before process voltage is restored.
04
System Integration
ABB TU531 1SAP217200R0001 forms the mechanical and electrical transition between an S500 expansion module, the local I/O bus and high-voltage field wiring.
01
Upstream bus connection
The male 10-pole bus joins the CPU terminal base, FBP terminal unit or preceding I/O terminal unit.
02
Active module interface
The 50-pole and two 38-pole connectors carry bus and field connections into the inserted S500 module.
03
Downstream expansion
The female 10-pole bus continues the local I/O path to the next terminal unit without sharing the field terminal assignments.
05
Frequently Asked Questions
How do I know whether ABB TU531 1SAP217200R0001 matches the installed I/O module?
Check that ABB TU531 1SAP217200R0001 is specified for the exact S500 module and its 115/230 V AC or relay circuitry; do not select it only from the visible terminal count.
Can ABB TU531 1SAP217200R0001 keep the wiring in place during module replacement?
Yes. ABB TU531 1SAP217200R0001 retains the field conductors while the active expansion module is unlocked and removed, provided all hazardous voltage is isolated first.
Why are the terminal functions on ABB TU531 1SAP217200R0001 not fixed?
ABB TU531 1SAP217200R0001 is a passive terminal unit, so each terminal function is defined by the particular S500 I/O module plugged into it.
What should be checked if an S500 module will not seat on ABB TU531 1SAP217200R0001?
For ABB TU531 1SAP217200R0001, inspect the mechanical coding, all three module plugs and both retaining locks; forcing a mismatched module can damage the connectors.
Can ABB TU531 1SAP217200R0001 be added anywhere in the local I/O row?
ABB TU531 1SAP217200R0001 must remain within the permitted terminal-unit count and bus arrangement of the installed CPU or terminal base, with the bus fully joined on both sides.
What is the safest order for commissioning ABB TU531 1SAP217200R0001?
Mount ABB TU531 1SAP217200R0001, land conductors against the exact module map, seat and lock the module, verify continuity and protective measures, and only then restore process voltage.
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07
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08
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CompanyMoore Automation
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