- 13 -LD620D3-2 Interface Cable Connection3-2-1 Standard ModelConnect the interface cable as shown below.This printer supports the following communications interface standards.- RS-232C (Serial)- IEEE1284 (Parallel)- USB1) Turn off the power switch.2) Connect the communication cable to the printer communication port to be used.- Connect the RS-232C(Serial) Cable to the SERIAL port.and tighten the screw on both sides.This port requires a shielded cable less then 1.8m long.- Connect the IEEE1284(Parallel) Cable to the PARALLEL port.and fasten the clips on both sides.This port requires a shielded cable with ferrite core less then 1.8m long.- Connect USB cable to the USB port.This port requires a shielded cable less then 1.8m long.USB Cable RS-232 (Serial) CableIEEE1284 (Parallel) Cable