BENTLY 125808-05 Proximitor / Velomitor External Termination Block
Chinese name: Eddy Current/Speed Sensor External Terminal Block (External Terminal Box Accessory)

1、 Basic Introduction
The 125808 series is an external adapter terminal box for 3500 systems, which is not an internal I/O card in the rack and is installed independently in the cabinet;
Function: Extend the wiring distance of sensor cables, standardize on-site wiring, provide signal buffering, and circuit testing points.
Compatible cards: 3500/40M, 3500/42M (configured with external termination scheme).
Series suffix differentiation (procurement focus)
125808-02: European terminal Prox/Velomitor external terminal block
125808-05: Same series external termination block, hardware layout and wiring definition adapted to 4-channel monitoring card external wiring scheme
125808-08: Another version of European terminal block
⚠️ 125808-XX ≠ Rack Rear I/O Module (128240-01 type)
The physical locations of the two are completely different and cannot be replaced by each other.
2、 Core functions
One side is connected to the external I/O module on the back of the 3500 rack through a dedicated cable;
The other side is connected to the on-site 3300XL eddy current preamplifier and Velomitor speed sensor;
Reserved test terminals for online measurement of sensor circuit voltage and dynamic signals;
Built in EMI signal filtering to suppress on-site cable interference;
Support centralized wiring management for 4-channel sensors.
3、 Supporting cables (commonly used in projects)
3500 Monitoring Card I/O Rear Card ↔ 125808 External Termination Block Special Cable:
Model format: 129525- Length code (0005/0010/0025/0050, etc., in feet)
4、 Comparison of Two Wiring Solutions (Must See Selection)
Table
Hardware composition characteristics of the solution
The built-in terminal rack I/O card can be directly connected to the back of the rack without the need for a 125808 cable, saving accessories; Disorderly wiring
External termination of I/O card → 129525 cable → 125808-05 termination block → on-site sensor wiring centralized for easy maintenance and online testing, mainstream solution for large units
5、 Life cycle and source of goods
Original factory standard accessories, continuous supply;
Source of goods: Both brand new original and disassembled spare parts are in circulation
Warranty reference: Brand new original 12 months, disassembled spare parts 3-6 months