BENTLY 125808-02
Full name: Proximitor/Seismic External Termination Block
Chinese: Displacement/velocity&acceleration external terminal block (European terminal type)

125808-02 physical object
1、 Basic Overview
125808-02 belongs to the external wiring adapter terminal box of the 3500 system and does not belong to the internal I/O card of the rack;
Used for external wiring solutions, compatible with 3500/40M and 3500/42M four channel monitoring cards.
Supporting link: External I/O card at the back of the rack → 129525 series dedicated cable → 125808-02 → on-site sensor
2、 Core functions
Support 4-channel signal access:
✅ 3300XL eddy current preamplifier (displacement/axial vibration/axial displacement)
✅ Velomitor speed sensor
✅ Piezoelectric accelerometer
Reserved testing points for online measurement of sensor circuit voltage and dynamic waveform without the need for rewiring;
Built in signal shielding and EMI filtering to reduce interference from long cables;
European style spring terminals, stable wiring, convenient for centralized wiring management in cabinets;
Integrated shielding grounding terminal for unified handling of sensor shielding layer.
3、 125808 series suffix differentiation (procurement focus)
Model Structure Type Applicable Scenarios
125808-02 European terminal type (mainstream commonly used) 3500/40M, 3500/42M standard external wiring
125808-05 hardware version differences, terminal definitions are consistent, batch versions are differentiated, and project drawings cannot be directly interchanged before selection
125808-08 Replacement of Spare Parts for Another Revised European Terminal Block Old Project
⚠️ Important reminder:
125808-XX ≠ Rack I/O Rear Card (128240-01, 128229-01)
The I/O card is installed on the back of the rack; The 125808 series is independently installed on the cabinet rail and cannot be replaced by each other.
4、 Supporting specialized cables
I/O Rear Card ↔ Terminal block connection cable: 129525- Length code
Example: 129525-0005 (5ft), 129525-0010 (10ft), 129525-0025, 129525-0050
5、 Comparison of two wiring schemes
Built in terminal solution
The I/O card directly leads out the cable without the need for a 125808 terminal block; Advantages include fewer accessories, disadvantages include messy cables and inconvenient maintenance.
External terminal scheme (mainstream for power plants/large units)
I/O card → 129525 cable → 125808-02 → sensor; Centralized wiring, convenient online testing, and easy post maintenance.