Current monitoring relay for IO-Link, mountable on contactor 3RT2, size S0. Apparent/real current monitoring 4-40 A, 20-400 Hz, 3-phase. Supply voltage DC 24 V, 1 changeover contact. Monitoring for overcurrent and undercurrent, current asymmetry, phase failure, wire break, phase sequence, earth fault, blocking current, switching cycles, and operating hour counter. Warning and alarm thresholds, AUTO or MANUAL RESET, start delay 0-9999.9 s, switch-off delay 0-9999.9 s, restart delay 0-300 min. Spring-loaded technology. SIRIUS 3RR2 monitoring relay for plugging onto SIRIUS 3RT2 contactors or for standalone use for multi-phase current monitoring of the entire system or the driven process. Reliable monitoring of cable breaks, phase failures, phase sequence, earth faults, motor blocking, and more increases system availability. Actual value displays, status messages, and clear fault messages enable quick and reliable diagnostics. Control connection via IO-Link is also possible. You save costs as only one device is required to monitor a motor across the entire torque curve, and no separate current transformers are needed. Direct mounting on contactors 3RT2 eliminates additional wiring effort in the main circuit. Additionally, benefit from wide-range power supplies for global use. Available are analog adjustable, 2-phase variants and digitally adjustable, 3-phase variants (with and without IO-Link), each in three sizes with different current measurement ranges, two different supply voltages, and two connection types. Suitable carriers are available for the standalone use of the 3RR2 monitoring relays. SIRIUS relays - a program for all cases.