Siemens SIMATIC PLC 6AG1551-1AB00-7AB0 SIPLUS S7-1500 TM POSINPUT 2   -40... +70 DEGREES C   STARTUP -25 DEGREES C   WITH CONFORMAL COATING   BASED ON 6ES7551-1AB00-0AB0   .   COUNT AND POSITON   INPUT MODULE. 2 CHANNELS   FOR RS422 INCREMENTAL ENCODER   OR SSI ABSOLUTE ENCODER,   2 DI, 3 DQ PER CHANNEL 6AG15511AB007AB0