| Processor |
32-bit RISC, 0.3 ms / 1K instructions (typical) |
| Work Memory |
128 KB (RAM) – fully usable for program + data |
| Load Memory |
Micro Memory Card (MMC) required – up to 8 MB (e.g., 6ES7953-8LG31-0AA0) |
| Processing Speed |
0.1 – 0.6 µs per binary instruction 1.0 – 3.0 µs per word instruction
|
| Bit Memory / Timers / Counters |
8 KB / 256 / 256 |
| Data Blocks |
Up to 1023 (DB 1 – DB 1023) |
| Communication |
1 × MPI/DP (187.5 kbps) – configurable as DP master (up to 125 slaves) Supports PG/OP, S7 routing, global data
|
| PROFIBUS DP |
Master mode: up to 125 DP slaves, 12 Mbps, GSD support Isochronous mode via DPV1 |
| Expansion |
Up to 31 modules across 4 racks (with IM 360/361) |
| Supply Voltage |
24 V DC (20.4 – 28.8 V) |
| Power Consumption |
0.8 A typical (without load on 24 V output) |
| Backup |
Battery via MMC – retains retentive data, clock (≥ 6 months) |
| Real-Time Clock |
Yes (battery-backed) |
| Diagnostics Buffer |
256 entries (last 100 retained) |
| Operating Temperature |
0°C to +60°C (horizontal); −25°C to +60°C (vertical, derating) |
| Storage Temperature |
−40°C to +70°C |
| Dimensions (W×H×D) |
40 mm × 125 mm × 130 mm |
| Weight |
0.28 kg (0.62 lbs) |
| Mounting |
S7-300 DIN rail (slot 1 – CPU position) |
| Connectors |
9-pin D-sub female (PROFIBUS DP), Power: screw terminals
|
| LED Indicators |
SF (red), BF (red), RUN (green), STOP (yellow), FRCE (yellow)
|
| Certifications |
CE, UL, cULus, CSA, FM Class I Div 2, ATEX Zone 2, IECEx
|
| Standards Compliance |
IEC 61131-2, EN 61000-6-2/4 (EMC), UL 508, CSA C22.2
|
