This is an LCNP4G card for the GUS station.

This card provides the interface between the PC and the LCN, and is the main component making the station a GUS rather than a standard PC.

The LCNP4(x) uses the faster 68040 microprocessor and has 16 MW of memory. A connection for a GPS time sync source for controlling the LCN time was introduced with the LCNP4G and continued with the LCNP4M.

Tab -100 -200, and -500 are used in all non-TPNB Bridge applications and tab -300, -400, and -600 are used in the TPNB Bridge.

Tab -100 & -300 has a frame, -200 & -400 has frame plus plastic card guide, -500 & -600 has no frame.