68M-50F

National Instruments 68M-50F / 68VHDCI-50F Cable Adapters
Features

• Adapts NI Cables to Standard 50-Pin Connectors
• Latches to the SH1006868 for 64-Channel Devices
• Latches to the SHC68-68-EP for PCMCIA Devices
• Latches to the SHC68-68U-EP for PCMCIA Devices

The National Instruments 68M-50F Cable Adapters connects a 68-pin NI cable to a standard 0.1 by 0.1 in. 50-pin connector on third-party or custom accessories. The 68M-50F MIO should be used with the SH68-68-EP, SHC68-68-EP, SHC68U-68-EP, or the MIO leg of the SHC1006868. The 68M-50F Extended I/O cable adapter should be used for the extended I/O leg of the SH1006868.

From NI Forums:
P/N 184670-01 is a 68M-50F MIO Cable Adapter. This device is meant to connect 68-pin multifunction data acquisition devices to 50 pin DAQ equipment
P/N 185630-01 is a 68M-50F STEP/SERVO Bulkhead Cable Adapter. The purpose of this device is to connect 68 pin motion control devices to 50 pin drives, like the obsolete nudrives series.