Siemens 6ES5490-7LB21 SIMATIC S5 Front Connector

Series#: Siemens

Product Details

6ES5490-7LB21 – Genuine Siemens SIMATIC S5 front connector for reliable signal termination.
Designed for SIMATIC S5 I/O modules, ensuring seamless integration and secure wiring.
Supports up to 20 screw-type terminals for robust field connection.
Rated for industrial environments: 250V AC/DC, 10A per contact.
Compact form factor simplifies cabinet wiring and reduces installation time.
Fast global delivery from stock – order now for rapid deployment.
Guaranteed 100% Original factory condition, offering fast and secure worldwide delivery.

Specification

The 6ES5490-7LB21 is a high-reliability front connector from Siemens' SIMATIC S5 series, engineered for secure electrical connections between field devices and S5 I/O modules. This connector features 20 screw-type terminals, each rated for up to 250V AC/DC and 10A, making it suitable for both digital and analog signal wiring in demanding automation environments. Its robust thermoplastic housing provides excellent insulation and mechanical stability, while the integrated strain relief ensures long-term cable integrity. Designed for easy installation and maintenance, the 6ES5490-7LB21 is a critical component for legacy S5 systems requiring dependable field wiring interfaces.

Parameter	Specification
Product Type	Front connector for SIMATIC S5 I/O modules
Model Number	6ES5490-7LB21
Number of Terminals	20 (screw-type)
Rated Voltage	250 V AC/DC
Rated Current per Contact	10 A
Connection Type	Screw clamp, wire cross-section 0.5 – 2.5 mm² (AWG 20–14)
Insulation Resistance	> 10 MΩ at 500 V DC
Dielectric Strength	2.5 kV AC for 1 minute
Operating Temperature Range	-25°C to +60°C
Storage Temperature Range	-40°C to +80°C
Housing Material	Polyamide (PA) with UL94 V-0 flammability rating
Protection Class	IP20 (when installed)
Standards Compliance	IEC 61131, EN 60947, UL 508
Weight	Approx. 0.12 kg
Packaging	Individual carton, factory-sealed