The A5255 is a four 17×2 pin, 2.54 mm pitch header adapter (64 channels in total) for flat cables. It provides an auxiliary LEMO connector for NIM/TTL signals, driving channel 0, that is the common time reference (selection between NIM/TTL via solder jumpers).
64 channels adapter for A5203
Four 17 x 2 pin 2.54 mm pitch header connectors
Ideal for connection with flat cables
Aux LEMO for Tref signal