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Model 468, FD690 Diameter Correction Amplifier Board

Model 468, FD690 Diameter Correction Amplifier Board

SKU: 468-A28473Categories: Electronics, Wheel Slip 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.


Product Details

FD690 – Diameter Correction Amplifier Card – This card has four amplifiers. Three of the amplifiers have memory units which control the circuit gain. The fourth amplifier has no memory unit; its gain is controlled by a potentiometer adjustment. This, in turn, becomes a reference for the other three amplifiers.

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
  • 18 ‐ 30VDC
  • 20 – 50 VDC
  • 60 – 95 VDC
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


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