In most procurement cycles, EMG-17-REL-KSR-24-21-21-LC is considered with SMPS Phoenix, Phoenix 2966207 and Phoenixcontact Phoenix Contact Industrial Ethernet Switches, giving decision-makers confidence that they’ve chosen the most dependable component.
Phoenix EMG 17-REL/KSR- 24/21-21-LC Relay Module
The Phoenix EMG 17-REL/KSR- 24/21-21-LC Relay Module (Part No: 2940391 ) offers a 24 V AC/DC nominal input voltage UN, 19.2 V AC/DC ... 26.4 V AC/DC (20 °C) input voltage range, polarized Drive, 8 ms typical response time. Manufactured by Phoenix under the Phoenix Relay Module category, this model belongs to the Phoenix PLC Series.
| Brand | Phoenix Contact |
| Product Type | Relay Module |
| Model Number | EMG 17-REL/KSR- 24/21-21-LC |
Phoenix EMG 17-REL/KSR- 24/21-21-LC Relay Module – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Relay Module |
| Product family | EMG |
| Application | Universal |
| Mechanical service life | approx. 5x 107 cycles |
| Insulation | Safe isolation, reinforced insulation |
| Overvoltage category | III |
| Pollution degree | 2 |
| Maximum power dissipation for nominal condition | 0.43 W |
| Test voltage (Winding/contact) | 4 kV AC (50 Hz, 1 min., winding/contact) |
| Test voltage (Changeover contact/changeover contact) | - |
| Rated surge voltage | 6 kV |
| Nominal input voltage UN | 24 V AC/DC |
| Input voltage range | 19.2 V AC/DC ... 26.4 V AC/DC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 18 mA |
| Typical response time | 8 ms |
| Typical release time | 10 ms |
| Protective circuit | Bridge rectifier; Bridge rectifier |
| Operating voltage display | Yellow LED |
| Contact switching type | 2 changeover contacts |
| Type of switch contact | Single contact |
| Contact material | AgNi |
| Maximum switching voltage | 250 V AC/DC |
| Limiting continuous current | 5 A |
| Maximum inrush current | 6 A |
| Min. switching current | - |
| Interrupting rating (ohmic load) max. | 120 W (at 24 V DC) |
| Switching capacity | - |
| Connection method | Screw connection |
| Stripping length | 8 mm |
| Conductor cross section rigid | 0.2 mm² ... 4 mm² |
| Conductor cross section flexible | 0.2 mm² ... 2.5 mm² |
| Conductor cross section AWG | 24 ... 12 |
| Tightening torque | - |
| Width | 17.5 mm |
| Height | 75 mm |
| depth | 62.5 mm |
| Color | green (RAL 6021) |
| Flammability rating according to UL 94 | - |
| Degree of protection (Relay) | - |
| Degree of protection (Relay base) | - |
| Ambient temperature (operation) | -20 °C ... 40 °C |
| Ambient temperature (storage/transport) | -20 °C ... 70 °C |
| Temperature | - |
| Humidity | - |
| Vibration | - |
| EMC | - |
| Enclosure | - |
| Low Voltage Directive | - |
| Electromagnetic compatibility | - |
| Standards/regulations | EN 61810-1 |
| Mounting Type | DIN rail mounting |
| Mounting position | any |
| Contact Connection type | - |
| Output fuse | - |
| Degree of protection (Installation location) | - |
The Phoenix Contact EMG 17-REL/KSR-24/21-21-LC (Part No: 2940391) Relay Module is engineered for reliability, precision, and long service life in demanding automation environments. Operating at a nominal input voltage of 24 V AC/DC, it supports a stable voltage range of 19.2 V to 26.4 V at 20°C. This Phoenix AgNi Contact Relay Module features two changeover contacts built with AgNi material, ensuring excellent conductivity and wear resistance. With a mechanical service life of approximately 5×10⁷ cycles and a power dissipation of just 0.43 W, the EMG 17-REL/KSR-24/21-21-LC ensures energy-efficient operation and long-term durability. The integrated bridge rectifier protection and reinforced insulation offer enhanced safety and protection from voltage surges. Designed for easy DIN rail mounting with screw connection terminals, this 17.5 mm wide relay module fits easily into compact control panels. The yellow LED indicator provides clear visual status feedback, while the IP20 relay base ensures safe handling and installation across industrial environments.
The Phoenix Contact Relay Module EMG 17-REL/KSR-24/21-21-LC (2940391) is widely used in machine control, process automation, and power distribution systems that demand reliable switching of 24 V AC/DC signals. This Phoenix AgNi Contact Relay Module is particularly suitable for control cabinets, PLC interfaces, and industrial panels where electrical isolation, stability, and quick response are critical. Engineers appreciate its robust design, long mechanical life, and quick 8 ms response time, which ensures dependable performance during repetitive operations. Its universal compatibility with automation components makes it an excellent choice for both maintenance engineers and control system integrators who prioritize precision, safety, and compact design in relay modules.
The Phoenix Contact EMG 17-REL/KSR-24/21-21-LC (2940391) stands out as a reliable relay module trusted for precision, durability, and consistent performance in industrial automation. Engineered for long life and energy-efficient operation, the emg-17-rel-ksr-24-21-21-lc-2940391 ensures safe and accurate signal switching in automation systems. Compact, efficient, and robust, the Phoenix Contact EMG 17-REL/KSR-24/21-21-LC provides engineers with dependable relay performance and proven quality for modern control and monitoring applications.
