The spring-loaded terminals on the main circuit accept 2x (0.5...2.5 mm²) solid or stranded wire, which is the standard range for control wiring in this class.
At 45 mm wide and 97 mm deep, it occupies a single 45 mm slot on the DIN rail. Required clearances: 50 mm above and below, 30 mm to the side, and 0 mm forward/backward — meaning it can be packed tight against the back panel or enclosure door.
The auxiliary contact block handles 1 A at 24 V, 0.5 A at 120/125/230 V, and 0.15 A at 60 V. These are the standard signal-level ratings for feeding a PLC input or a contactor coil — not for power switching.