Technical Parameters Parameter Specification Series ABB CR-M Series (Accessory Contact Block) Product Type 4-Pole Auxiliary Contact Block (Snap-on) Order Code CR-MX024DC4L Contact Configuration 2 Normally Open (NO) + 2 Normally Closed (NC) (Total 4 changeover contacts in two independent blocks) Contact Material Fine silver alloy, suitable for low-level switching. Rated Operational Current (Ie) 4 A (at specified voltage, see below) Utilization Category AC-15: For AC electromagnetic loads (e.g., contactor coils). DC-13: For DC electromagnetic loads (optimized for this, as per “DC” code). Switching Capacity At 24V DC: 4 A (for DC-13, typical for PLC inputs/solenoids) At 230V AC: 4 A (for AC-15, typical for contactor coils) Rated Insulation Voltage (Ui) 690V AC / 750V DC Rated Impulse Withstand Voltage (Uimp) 6 kV Mechanical Life Typically 10 million operations or more. Electrical Life At rated load (AC-15 / DC-13): Typically 300,000 to 500,000 operations. At low consumption (e.g., 24V DC, 100mA for PLC): Can exceed 5 million operations (benefit of “L” design). Connection Screw terminals for reliable wiring. Terminal marking for each contact: A1/A2 (for NO) and B1/B2 (for NC) per block. Mounting Snap-on attachment to the rear of compatible CR-M series actuator heads. Multiple contact blocks can be stacked together. Safety Feature Contacts are positively guided (force-guided) as per EN 60947-5-1 Annex L? (For CR-MX series, this is common but must be confirmed for this specific “024” block. Safety applications require verified blocks). Standards Compliance IEC/EN 60947-1, IEC/EN 60947-5-1 Ambient Temperature -25°C to +70°C (Operation) Protection Degree (IP Rating) IP40 (as part of the assembled device in an enclosure)