Model 468, FD691 Differential Detector Board
Model 468, FD691 Differential Detector Board
The wheel slip panel assembly contains all the wheelslip-slide detection electronics and relays. The major portion of the electronic components is mounted on six plug-in cards. Matrix reverse-engineered the six plug-in cards that meet original engineering specifications.
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FD691 – Differential Speed Detector Card – This card detects steady state speed differences between any one (or two) of the input channels and the other three (or two) channels.
The cards plug into sockets mounted on the panel base. Connecting pins in each plug are mated such that the circuits on each card are connected through wiring in the panel or other cards and to the connector pins.
Electrical Specifications
| Nominal Input Voltage | 24VDC/37.5 VDC/74VDC |
| Nominal Input Voltage Range |
|
| No. of Independent Channels | 7 LED Channels |
| Power | 23 Watts |
| Input Protection | Reverse Voltage Protection |
| High / Low Voltage Protection | |
| Spike and Transient Protection | |
| Warranty | 5 Years |
Mechanical Specifications
| Size | 7.830″ X 7.000″ X 0.940″ |
| Connections | Connector |
| Mount | Socket |
