Siemens 6AV1908-0BC00 Versatile HMI

This versatile HMI provides operator interface functionality for Siemens SIMATIC automation systems. It connects to PLCs for machine monitoring and parameter adjustment. Therefore, it enables operators to control industrial processes effectively.

Physical and Display Specifications

The Siemens 6AV1908-0BC00 measures 21.0 cm in length and 15.0 cm in width. Moreover, its HMI weight equals approximately 1.10 kg for panel mounting. A single 25-pin D-sub connector links this unit to the PLC. Additionally, the device includes a backlit LCD display and a membrane keypad.

Parameter	Specification
Brand	Siemens
Full Model	6AV1908-0BC00
Category	Versatile HMI (Human-Machine Interface)
Dimensions (L x W x H)	21.0 cm x 15.0 cm x 6.5 cm (8.27″ x 5.91″ x 2.56″)
HMI Weight	1.10 kg (2.43 lbs)
Display Type	Monochrome LCD (Backlit)
Display Resolution	240 x 64 Pixels (Graphical)
Display Size	12.0 cm x 4.5 cm (4.72″ x 1.77″)
Text Display Capacity	4 Lines x 40 Characters (Maximum)
Graphic Display Capacity	240 x 64 Dot Graphics
Backlight Type	LED (Green/Yellow)
Backlight Life	50,000 Hours (Minimum)
Keypad Type	Membrane (Tactile Feedback)
Number of Keys	32 Keys (Alphanumeric + Function)
Function Keys	8 User-Programmable Soft Keys
Key Legend	Customizable Overlay Available
Interface Connector	1 x 25-pin D-Sub Female (RS-232/RS-422)
Communication Protocols	AS511 + RK512 + Modbus RTU
Baud Rate Range	9600 to 115200 baud
Power Supply	24 VDC External (19.2 to 28.8 VDC)
Power Consumption	6 W (Typical)
On-Board Components	1 Microcontroller + 1 LCD Controller + 3 Memory Chips + 2 UARTs + 1 Keypad Decoder + 1 Display Driver + 6 Protection Diodes + 1 Voltage Regulator + 2 Isolation Transformers + 1 Fuse
Energy Storage	2 x 470 µF Electrolytic Capacitors (35V) + 2 x 100 µF (16V) + 2 x 10 µF Tantalum (25V)
Operating Temperature	0°C to +50°C (32°F to 122°F)
Storage Temperature	-20°C to +70°C (-4°F to 158°F)
Protection Rating	IP54 (Front Panel)
Mounting Type	Panel Mount (Cutout 20.0 cm x 14.0 cm)
Status Indicators	1 Green LED (Power) + 1 Yellow LED (Comm Active) + 1 Red LED (Fault)

Display and User Interface Features

The Siemens 6AV1908-0BC00 features a graphical 240 x 64 pixel LCD display. Specifically, the backlit screen shows process diagrams and alarm lists clearly. In addition, eight programmable soft keys provide direct access to machine controls. Moreover, the membrane keypad offers tactile feedback for reliable data entry. Consequently, operators can navigate menus and edit parameters without external devices.

Multi-Protocol Communication Support

This versatile HMI supports multiple industrial communication protocols for flexible connectivity. For instance, the AS511 protocol connects directly to SIMATIC S5 PLCs. In addition, the RK512 protocol enables peer-to-peer communication with Siemens devices. Furthermore, Modbus RTU allows connection to third-party controllers and drives. Thus, this HMI integrates seamlessly into mixed-vendor automation environments.

Energy Storage and Operational Stability

This HMI stores energy using six onboard capacitors for power filtering. Specifically, two large capacitors smooth the 24 VDC input for stable microcontroller operation. In addition, two capacitors filter the LED backlight power supply. Furthermore, two tantalum capacitors provide high-frequency noise suppression for logic circuits. Therefore, the Siemens 6AV1908-0BC00 continues operating through brief power interruptions reliably.

Installation and Diagnostic Indicators

Three LED indicators on the front panel provide operational status at a glance. First, a green Power LED lights when the 24 VDC supply is present. Second, a yellow Comm Active LED flashes during data exchange with the PLC. Third, a red Fault LED indicates hardware errors or communication timeouts. Additionally, the HMI requires a panel cutout of 20.0 cm by 14.0 cm. Thus, this versatile HMI fits standard industrial enclosure openings perfectly.