IBH S5 Current Loop Converter
The SMD electronics are housed in a solid metal 15 pin sub-D connector shell. The pin assignment fits the following SIMATIC PLCs: 90U, 95U, 100U, 101U, 115U, 135U and 155U.
The 9 pin sub-D connector plugs into a serial port (COM1 to COM4) on the PC. The PLC must be active and supply the loop current (2 x 20 mA). If the PLC is passive, a current loop converter can be used to provide power.
Cable length is 3 meters (approximately 10 feet).