CNC/NC Hardware Products GNT 4604 Reader/Punch Station Reading speed 400 cps. Punching speed 75 cps. ASCII/ISO/EIA code conversion. Transmission speed 110-9600 baud. RS232C serial interface with current loop and parallel TTL input Table top model with unwinder for punch. GNT 2910 Reader Small photo-electrical reader. Table top model. Possibility for rack-mounting. RS232C serial interface. Transmission speed 110-9600 baud. Reading speed 0-450 cps. This unit is special order only - Please ring or email for more details. Further details can be obtained by downloading the PDF file below: GNT 4604 GNT 2910