Siemens QLCDM024DCBAN 16809-41/5 Critical Discrete & LCD Module

Product Description

Overview

The Siemens QLCDM024DCBAN (16809-41/5) is a versatile industrial module combining critical discrete I/O control with a high-resolution LCD display interface. It integrates 32 configurable channels for discrete DC sensors and actuators with APACS+ control systems while providing real-time visual feedback of system parameters. Designed for safety-critical and industrial monitoring applications, it ensures reliable operation under harsh environmental conditions.

Product Description

The QLCDM024DCBAN serves dual roles:

Critical Discrete Module (CDM) Functions:
It manages 32 discrete channels, each configurable as an input, output, event input, event output, or pulse output. Inputs are current sinking, and outputs are current sourcing, with soft-fuse protection for each output channel to prevent field short-circuits from affecting other channels. Channels (except pulse output) support pulse-test diagnostics using a Safety-Related Switch Adapter (SRSA) to detect wiring faults, shorts, and other anomalies.

Display Module Functions:
The integrated LCD provides operators with a clear, real-time HMI for monitoring system parameters, acknowledging alarms, and navigating menus without a PC. The module features a backlit display for readability in low-light environments, high-contrast alphanumeric and graphical icons, and optimized refresh rates for real-time updates.

Key Identification:

• Series: APACS+ / Quadlog

• Type: Critical Discrete Module & LCD Display

• Channels: 32 configurable discrete I/O points

Technical Specifications

Applications

• Industrial monitoring panels requiring both visual feedback and discrete I/O control

• Safety interlock and emergency shutdown systems

• Chemical, power generation, and process control environments

• Integration with legacy APACS+ or Quadlog automation systems

FAQ

Q: How many discrete channels does this module support?
A: 32 channels, configurable as input, output, event input/output, or pulse output.

Q: Is the display suitable for low-light environments?
A: Yes, the module features a backlit LCD with high contrast for visibility in dark control cabinets.

Q: How are output short-circuits managed?
A: Each output channel is protected with a soft-fuse circuit, resettable locally or remotely.

Q: Can this module operate independently as an HMI?
A: It provides basic monitoring and control feedback but is designed to interface with the APACS+ control system.