Siemens 6ES5777-1BC00 Bus Terminal

This Siemens bus terminal provides a reliable connection point for PROFIBUS networks. The Siemens 6ES5777-1BC00 terminates the bus line to prevent signal reflections. Its compact design simplifies installation in control cabinets. This component ensures proper communication in distributed automation systems.

Physical Dimensions and Mounting Specifications

The bus terminal measures 80 mm in height and 45 mm in width. Its overall depth reaches 60 mm including the connectors. This unit weighs approximately 0.15 kilograms for easy mounting. The housing features a durable plastic enclosure with snap-on mechanism. The Siemens 6ES5777-1BC00 supports DIN rail mounting for convenient installation. Two 9-pin D-sub connectors provide the bus interface.

Electrical and Termination Specifications

This terminal includes a built-in 220 Ω termination resistor for bus line matching. It also features a 390 Ω pull-up resistor and a 390 Ω pull-down resistor. The termination network matches the PROFIBUS specification for reliable communication. The unit handles baud rates up to 12 Mbit/s for high-speed networks. The Siemens 6ES5777-1BC00 provides galvanic isolation for bus signal integrity. LED indicators show bus activity and termination status.

Connection and Diagnostic Features

This terminal offers two bus connectors for daisy-chaining multiple devices. It includes a switchable termination function for flexible network configuration. The Siemens 6ES5777-1BC00 supports both incoming and outgoing bus connections. A diagnostic LED indicates proper termination and bus status. The unit’s design prevents data corruption from signal reflections.

Detailed Specification Table

Parameter	Specification
Dimensions (H x W x D)	80 mm x 45 mm x 60 mm
Weight	Approx. 0.15 kg
Connector Type	2 x 9-pin D-sub
Termination Resistor	220 Ω
Pull-up Resistor	390 Ω
Pull-down Resistor	390 Ω
Max Baud Rate	12 Mbit/s
Isolation	Galvanic
Mounting	DIN rail
Switchable Termination	Yes
Operating Temperature	0°C to 60°C

Application and Installation Guidelines

Mount this terminal at the end of each PROFIBUS segment. Connect the incoming bus cable to the first D-sub connector. Use the second connector for outgoing cables if not terminating. The Siemens 6ES5777-1BC00 operates effectively between 0°C and 60°C. Enable the termination switch only when using the terminal at the bus end. Disable termination for intermediate network nodes. Verify the LED indicator shows correct termination status.