6DD1611-0AD0

Overview

• Model: 6DD1611-0AD0

• Type: Coupling Memory Module

• Series: Siemens SIMADYN D

• Function: Provides buffered real-time clock and coupling with MM4 memory module

Functional Specification

• Clock Time: Buffered by subrack back-up battery

• Memory Use:

  • MM3 inserted with MM4 → MM4 memory used

  • MM3 provides buffered real-time clock

  • MM3 memory itself not used in this configuration

• Display:

  • 10-digit, 7-segment displays (H1–H10) for seconds, minutes, hours, months, days

  • Arranged vertically in pairs

• Manual Control: 2 keys for clock setting

• Status Indication: 4 LEDs for system status

Interfaces

• X5 Terminal: Screw/plug-in terminal for system error signal relay

  • Relay opens when CPU detects fatal error → subrack enters STOP condition

• X6 Terminal: Prepared for IRIG-B audio signal (not implemented)

• X7 Connector: BNC socket for DCF-77 antenna connection

Electrical Specification

• Backup Battery: Maintains real-time clock

• Backup Current: Max. 15 µA

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