Siemens 6ES5454-7LB11 – 8-Channel Digital Output Module

This digital output module switches AC loads from a SIMATIC S5 PLC system. It drives contactors, valves, and indicator lamps in industrial automation. You can install this unit in any S5 series 100U or 115U rack.

Key Technical Specifications

Physical Layout and Rack Mounting

This output module measures 125 mm in width and 90 mm in height. Its depth reaches 55 mm for standard S5 racks. The unit weighs 310 grams for straightforward insertion into any slot. Two ejector tabs secure the module firmly to the backplane.

Internal Circuitry and Energy Storage

One hundred twelve components populate this relay-based output board. A 1000 µF capacitor bank filters the internal logic power supply. This bank also provides energy for relay coil holding during bus scans. Consequently, the module maintains stable output states without chattering. Each relay includes a flyback diode for DC load protection.

Output Configuration and Switching Capacity

Eight relay outputs provide isolated dry contacts for field devices. Each channel handles up to 2 amps at 230V AC or 110V DC. You can switch resistive or inductive loads without external snubbers. The relays operate in 10 milliseconds and release in 8 milliseconds. A removable terminal block accepts solid or stranded wires from 0.2 mm² to 2.5 mm².

Protection Features and Diagnostics

Eight red LEDs show the energized state of each output relay clearly. The module withstands momentary overloads up to 5 amps per channel. Relay contacts carry a mechanical life of 10 million operations. Electrical life reaches 100,000 cycles at rated load. Therefore, this module suits frequent on-off applications like conveyor sorting systems.