hi,
does anyone know, are there any input modules of s7 300 plcs supporting both npn and pnp types?
at the st 70 catalog, i couldn't find any information about npn modules, how can i understand that a module is npn or pnp?
Under "Input Voltage" in the specs it lists what the module expects: for the SM321-1BH50-xxxx you need to offer a "low" signal for a "1", and a "high" signal for a "0". The other modules (1BH02, 1BL00, 1BH10) are the opposite. I personally don't know of any modules that do both. There is a combined I/O module, but not for NPN.
hi,
does anyone know, are there any input modules of s7 300 plcs supporting both npn and pnp types?
at the st 70 catalog, i couldn't find any information about npn modules, how can i understand that a module is npn or pnp?