Siemens QBM97 Series User Manual

Modbus air pressure sensor with I/O extension
QBM97..
User Guide
A6V11478123_en_a
Building Technologies
2019
-02-01

Siemens QBM97 Series Specifications

General

Brand	Siemens
Model	QBM97 Series
Category	Accessories
Language	English

Summary

Safety Notes in the Data Sheet

Safety Notes Compliance

1 Installation

1.1 Mounting Instructions

Provides a tip for accessible mounting and instructions on screwing the sensor to the surface.

1.4 Wiring Overview

Introduces the wiring section and details the grounding situation of the QBM97..

1.4.1 Electrical Grounding

Explains grounding, the RS485 interface, and potential power source issues.

1.4.2 Power Supply Connection

Shows the terminal diagram for the 24V power supply and notes earth connection is optional.

1.4.3 Signal Wiring Introduction

Introduces signal wiring and illustrates analog inputs for passive sensors and voltage signals.

1.4.3.1 Analog Input Configurations

1.4.3.2 Analog Output Configurations

2 Commissioning

2.1 Modbus Addressing

Explains setting Modbus address and termination via DIP switches on Climatix and other controllers.

2.1.1 DIP Switch Configuration

Details DIP switch functions for Modbus address and termination, with examples.

2.1.2 On-Event Addressing (Climatix)

2.2 Fault Detection and Reset

Covers fault detection via LED/error codes and how to perform a factory reset.

3 Engineering

3.1 Volume Flow Measurement Setup

3.2 Modbus Register Overview

Lists Modbus function codes and details registers for type, error code, and analog output coupling.

Analog Input 1 Registers

Analog Output 1 Registers

Differential Pressure 1 Registers

Analog Input 2 Registers

Analog Output 2 Registers

Differential Pressure 2 Registers

Flow Sensor 1 Registers

Flow Sensor 2 Registers

Climatix Modbus Settings

Covers registers for Modbus address, baud rate, format, and bus configuration command.

4 Maintenance

4.1 Zero Reset Process