Locating and documenting the Modulebus termination provided by ABB TB807 within an existing S800 I/O arrangement
ABB TB807 is a passive Modulebus termination unit in ABB S800 I/O. Its small size makes it easy to overlook in a cabinet spare-parts list, even though its role is specific. Identify the bus arrangement and the installed termination location before ordering accessories for a system extension or repair.
Shared ABB automation image for ABB TB807; the supplied TB807 terminator is identified by its article number, not this reference photograph.
A terminator is part of the bus arrangement
Use the system documentation to locate the required termination point for ABB TB807. The purchase description should identify that role clearly, instead of calling the item an input module or a controller. This distinction helps stores personnel issue the correct accessory and helps an engineer review the intended cabinet arrangement. Keep the article number beside the short type name in the parts list.
Compact terminator identification
| Selection item | Evidence and confirmation scope |
|---|---|
| Product | ABB TB807 |
| Article number | 3BSE008538R1 |
| Function | Passive Modulebus termination |
| System mechanics | S800 |
| Published dimensions | 17 mm wide × 13 mm deep × 19 mm high |
| Published weight | 10 g |
Record the cabinet before an extension
- An I/O extension can change the physical arrangement that was documented when the cabinet was built.
- Before specifying ABB TB807, reconcile the current layout with the approved system drawing.
- Note the associated modules and bus accessories without assuming that every similar connector performs the same function.
- A complete drawing is a better basis for selecting ABB TB807 than an isolated photograph of a connector.
Small accessories need deliberate inventory labels
A compact passive item can be misplaced or confused with another bus accessory during storage. Label the spare record for ABB TB807 with its article number and intended system. Keep the component protected according to the supplier handling instructions and retain its packaging identification. Quantity should follow the approved cabinet design and spare policy; it should not be inferred from the number of I/O channels.
Avoid functional substitutions from appearance
The S800 accessory range includes components with different bus functions. A visually similar accessory should not be substituted for ABB TB807 without checking the documented purpose and compatibility. Ask the supplier to identify the exact article number being offered. When another reference is proposed, obtain the relevant manufacturer comparison and preserve ABB TB807 as the original requested item in the engineering record.
Make the installation review system-specific
A maintenance work package should name the affected cabinet and refer to the applicable ABB system instructions. For ABB TB807, the correct position and handling depend on that arrangement.
This product page is an identification and purchasing aid, not a substitute bus wiring procedure. Any system change should be checked against the current drawing and the site commissioning requirements before being accepted.
Receiving evidence for an exact accessory
Verify the delivered type and article number against ABB TB807, and retain a readable label record with the order. If the item arrives as part of a larger kit, record the kit contents separately so inventory does not double-count the terminator. A precise description of ABB TB807 makes future spares searches more reliable than a generic entry such as connector or PLC accessory.
Product evidence: manufacturer product information or original datasheet. The table identifies which points still require order-specific confirmation.
