Siemens 6ES7922-3BD20-0AC0 Front Connector

Reliable Interface for Signal Wiring

The Siemens 6ES7922-3BD20-0AC0 provides a 20-pole front connector for SIMATIC S7-300 I/O modules. This connector establishes a secure electrical interface between the field wiring and the PLC module. Its screw-type termination ensures durable and vibration-resistant connections for industrial environments. The connector supports both digital and analog signal transmission for versatile applications.

Key Technical Specifications

Parameter	Specification
Product Model	Siemens 6ES7922-3BD20-0AC0
Brand	Siemens
Category	PLC Accessory / Front Connector
Product Family	SIMATIC S7-300
Number of Poles	20 poles
Termination Type	Screw-type terminals
Wire Gauge Range	0.25 mm² to 2.5 mm² (AWG 24 to 14)
Rated Voltage	250 V AC / 250 V DC (depending on application)
Rated Current	10 A (maximum per pole)
Coding Element	Includes coding element for keying
Strain Relief	Integrated cable strain relief
Connection Method	Spring or screw connection (based on variant)
Mounting	Plugs directly into S7-300 modules
Material	High-temperature thermoplastic
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Protection Class	IP20

Physical Design and Connection Features

The Siemens 6ES7922-3BD20-0AC0 features a robust housing that withstands regular handling. The screw terminals provide secure and gas-tight connections for long-term reliability. An integrated coding element prevents incorrect insertion into the module slot. The connector includes strain relief to protect the wiring from mechanical stress.

System Integration and Compatibility

This front connector plugs directly into the front of compatible S7-300 I/O modules. It works with digital input, digital output, and analog modules. The connector mates with the module’s front interface.

Application Suitability

The front connector serves as the primary wiring interface between field sensors/actuators and the PLC. It simplifies system assembly and maintenance. The connector is a critical component for any S7-300 installation.