SIPLUS S7-400 SM 421 digital IO modules
6AG1421-1BL01-2AA0
SIPLUS S7-400 SM 421 digital input 32 inputs, 24 V DC Extended temperature
6AG1422-1BL00-2AA0
SIPLUS S7-400 SM 422 digital output 32 outputs, 24 V DC Extended temperature range and exposure to media