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Product Overview
This combined module provides real-time clock functionality and backup power for the SIMATIC S7-200 system. It integrates a lithium battery with a capacity of 1.2 Ah for long-term data retention. The module measures 35 mm in width, 75 mm in height, and 20 mm in depth. Its compact design weighs approximately 40 grams for simple snap-in installation. You can insert this module directly into the CPU’s dedicated slot without any tools. The device maintains the system clock and retentive memory during power outages.
The battery maintains the real-time clock for up to 5 years under normal operating conditions. This module also preserves the user program and data in the CPU’s retentive memory. The clock provides time-stamping capabilities for fault logs and event records. You can set the clock using the STEP 7 Micro/WIN programming software. The device automatically switches to battery power when the main supply drops below the threshold.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Battery and Clock Module |
| Model | 6ES7297-1AA23-0XA0 |
| Battery Type | Lithium (non-rechargeable) |
| Battery Capacity | 1.2 Ah |
| Clock Battery Life | Approx. 5 years (typical) |
| Data Retention | Yes (retentive memory) |
| Clock Accuracy | ±2 minutes per month |
| Time-Stamping | Yes (fault logs, events) |
| Compatibility | S7-200 CPU (all models) |
| Dimensions (W x H x D) | 35 mm x 75 mm x 20 mm |
| Weight | Approx. 40 g |
| Mounting | Snap-in (CPU slot) |
| Operating Temperature | 0 °C to 55 °C |
| Storage Temperature | -20 °C to 60 °C |
Key Features and Benefits
This module ensures uninterrupted time tracking even during extended power interruptions. Its long battery life reduces maintenance frequency and replacement costs. The integrated clock enables scheduled actions based on time of day or day of week. You can log fault events with accurate timestamps for troubleshooting purposes. The module preserves critical process data without requiring a separate UPS system.
Installation and Operation
You locate the dedicated battery slot on the front of the S7-200 CPU. Insert the module firmly until you feel it click into the locked position. After installation, you set the current date and time through the programming software. The module automatically charges a small capacitor for temporary buffering. The system will use battery power only when the main supply fails completely. A low-battery warning appears in the CPU diagnostics buffer when replacement becomes necessary.
Typical Applications
Water treatment plants use this module for time-based chemical dosing schedules. HVAC systems rely on it for day/night temperature setpoint changes. The module also serves in energy management and event logging applications.