Siemens 6ES5395-0UA31 Operator Panel

This operator panel provides local machine control for Siemens SIMATIC S5 automation systems. It interfaces directly with programmable logic controllers for data entry and display. Therefore, it enables operators to monitor processes and adjust parameters in real time.

Physical and Display Specifications

The Siemens 6ES5395-0UA31 measures 19.0 cm in length and 11.5 cm in width. Moreover, its panel weight equals approximately 0.85 kg for panel mounting. A single 25-pin D-sub connector links this panel to the S5 PLC. Additionally, the unit includes a built-in alphanumeric display and membrane keypad.

Parameter	Specification
Brand	Siemens
Full Model	6ES5395-0UA31
Category	OPERATOR PANEL (SIMATIC S5)
Dimensions (L x W x H)	19.0 cm x 11.5 cm x 6.0 cm (7.48″ x 4.53″ x 2.36″)
Panel Weight	0.85 kg (1.87 lbs)
Display Type	Monochrome LCD (Alphanumeric)
Display Size	4 Lines x 20 Characters
Character Format	5 x 7 Dot Matrix
Viewing Area	7.5 cm x 2.5 cm (2.95″ x 0.98″)
Keypad Type	Membrane (Tactile Feedback)
Number of Keys	28 Keys (Alphanumeric + Function)
Function Keys	8 User-Programmable Keys
Interface Connector	1 x 25-pin D-Sub Female (RS-232/RS-422)
Communication Protocol	Siemens AS511 (Proprietary)
Baud Rate Range	9600 to 38400 baud
Cable Length Maximum	500 meters (1640 feet) for RS-422
Power Supply	24 VDC External (19.2 to 28.8 VDC)
Power Consumption	5 W (Typical)
Backlight Type	LED (Green/Yellow)
Backlight Life	50,000 Hours (Minimum)
On-Board Components	1 Microcontroller + 1 LCD Driver IC + 4 Memory Chips + 2 UARTs + 1 Keypad Matrix Decoder + 4 Protection Diodes + 1 Voltage Regulator + 1 Fuse
Energy Storage	2 x 470 µF Electrolytic Capacitors (35V) + 2 x 100 µF (16V) + 1 x 10 µF Tantalum (25V)
Operating Temperature	0°C to +45°C (32°F to 113°F)
Storage Temperature	-20°C to +70°C (-4°F to 158°F)
Protection Rating	IP54 (Front Panel)
Mounting Type	Panel Mount (Cutout 18.5 cm x 11.0 cm)
Status Indicators	1 Green LED (Power) + 1 Yellow LED (Communication Active) + 1 Red LED (Fault)

Display and User Interface Features

The Siemens 6ES5395-0UA31 features a 4-line by 20-character LCD display. Specifically, the monochrome screen shows process variables, alarms, and menu texts clearly. In addition, eight programmable function 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.

Communication and PLC Connectivity

This operator panel connects to SIMATIC S5 PLCs using the AS511 protocol. For instance, the RS-232 interface suits short-distance connections up to 15 meters. In addition, the RS-422 interface allows cable runs up to 500 meters. Furthermore, the panel automatically detects the baud rate upon power-up. Thus, you can install this unit remotely from the PLC cabinet.

Energy Storage and Operational Stability

This panel stores energy using five onboard capacitors for power filtering. Specifically, two electrolytic capacitors smooth the 24 VDC input for stable microcontroller operation. In addition, two capacitors filter the display backlight power supply. Furthermore, one tantalum capacitor provides high-frequency noise suppression for logic circuits. Therefore, the Siemens 6ES5395-0UA31 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 Communication Active LED flashes during data exchange with the PLC. Third, a red Fault LED indicates hardware errors or communication timeouts. Additionally, the panel requires a panel cutout of 18.5 cm by 11.0 cm. Thus, this operator panel fits standard industrial enclosure openings perfectly.