Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 6AV3503-1DB10 |
| Manufacturer | Siemens (Digital Industries / Factory Automation) |
| Product Type | Operator Panel (Text HMI, OP3 family) |
| Product Series | SIMATIC OP3 |
| Display | 2 lines × 20 characters, monochrome LC, LED backlight |
| Backlight MTBF | 200,000 h @ 25 °C (>22 years continuous) |
| Function Keys | 5 membrane F-keys + numeric/hex membrane keyboard |
| Supply Voltage | 24 V DC (rated current 0.07 A, typical ~160 mA) |
| User Memory | 128 KB (Flash / RAM) |
| Operating System | RMOS (real-time) |
| Interfaces | 1 × RS232 (V.24, PG/PC config), 1 × RS485 (MPI/PPI/USS, max 1.5 Mbit/s) |
| Configuration Software | ProTool / ProTool Lite V2.51 or higher |
| Front / Rear Protection | IP65 front, IP20 rear |
| Ambient Temperature (storage/transport) | –20 to +60 °C, ≤85 % RH operating |
| Certifications | CE, UL, CSA, cULus, FM Class I Div. 2, GL, DNV, LRS, PRS |
| Housing Dimensions (W × H × D) | 148 × 76 × 25 mm |
| Cut-out Dimensions (W × H) | 138 × 68 mm |
| Weight | ~0.25 kg |
Main Features and Advantages
The Siemens 6AV3503-1DB10 is a study in “boring done right” for legacy automation plants. Its headline advantage is the 200,000-hour backlight MTBF — roughly 4× the typical industrial LCD backlight rating (often 50,000 h) and translating to >22 years at 24/7. In practice that means the backlight almost never dies before the rest of the machine does, which is why OP3 panels are still readable on 1998-vintage packaging lines that have seen three PLC upgrades. For plants where the HMI lives on a drive-side mast arm 6 m up or behind a guarded conveyor zone, that backlight longevity directly cuts planned-maintenance man-hours.The second advantage is the cable-bundle convenience baked into the “-1DB10” variant. Siemens shipped this OP3 SKU with three cables in the box: S7 connection cable (RS485 MPI to the CPU), PG/PC configuration cable (RS232 V.24 to a laptop running ProTool/Lite), and a 24 V DC power cable. Most modern HMIs ship as bare panels; the Siemens 6AV3503-1DB10 was specified this way because OP3’s primary market was machine-level add-on — an OEM dropping an OP3 next to a MICROMASTER on a conveyor head, or a retrofit engineer adding operator acknowledge to a legacy S5-115U that got an S7-300 MPU swap. Having the cables in the box eliminated the “which MPI cable do I need, 6ES7901-0BF00 or 6ES7972-0BB…?” confusion that still plagues S7-300 spare orders.Third, the certification stack is unusually deep for a 2×20 text panel. Beyond CE and UL/CSA, the Siemens 6AV3503-1DB10 carries GL, DNV, LRS, and PRS marine approvals plus FM Class I Div. 2 for hazardous-area industrial use. That makes it one of the few small text panels you can legally land on a ship’s engine-room monitoring rail, a ballast-control fascia, or a chemical-pump skid without a secondary enclosure review. For EPC spares buyers, that breadth means one OP3 BOM line covers onshore, offshore, and marine sub-projects.Fourth, interface simplicity works in its favor. One RS485 port at 1.5 Mbit/s handles MPI to S7-300/400 and USS to MICROMASTER/MASTERDRIVE — no Profibus DP card, no Ethernet, no WinCC Flexible migration headache. ProTool/Lite projects are tiny, portable, and editable on a Windows XP/7 laptop with a USB-RS232 dongle. For plants that refuse to migrate 1990s-vintage machine programs because “if it runs don’t touch it,” the Siemens 6AV3503-1DB10 is the exact spare that keeps the line alive. The 128 KB user memory holds message texts, recipe steps (limited), and alarm buffers — enough for the OP3’s intended duty of “show me the fault code, let me ack it, let me tweak the speed setpoint.”
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