RS-485 bundle includes the RS-485 interface which will be enabled in the instrument and RS-485 connection kit for PC control. 
 
1. Art. No. 4816 RS-485 interface for the control from a PC
 
2. Art. No. 4817-kit RS-485 connection kit (for connection to a serial port or USB port) includes: 
 - RS-232/485 converter - Power supply for RS-232/485 converter (5 V / 1 W)
 - RS-485 connection cable
 - USB to RS-232 converter