Unidrive M’s extended I/O interface module increases the number of I/O points on a drive. All connections from the option module to the drive are made via the drive connector. Connections from external equipment to the SI-I/O are made via a 3-way pluggable screw connector for the two relays and an 11-way pluggable screw connector for the digital and analog I/O.
 
Features include: 
• 4 x Digital inputs/outputs
• 3 x Analog inputs (default) / Digital inputs
• 1 x Analog output (default)* / Digital input
• 2 x Relays