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Differential Pressure Monitor

Technical Specification Sheet

Rev. 4, July, 2005

Document No. 149-311P25

Page 1 of 2

Differential Pressure Monitor

Figure 1. Differential Pressure Monitor with Remote Pressure

Transmitter.

The Differential Pressure Monitor (DPM) is an integral

part of the APOGEE® Automation System. The

monitor measures and displays the differential

pressure between a room and its adjoining space. It is

used for monitoring in hospital pharmacies and

isolation rooms, and also in labs, areas surrounding

labs, holding rooms, and other areas where

knowledge of the differential pressure is important.

The Differential Pressure Monitor can operate stand-

alone or networked to the APOGEE Automation

System. When used with the APOGEE Automation

System, alarm, differential pressure values, and status

point information can be communicated via a Local

Area Network (LAN) to a central terminal for display

and recording.

Features

• Through-the-wall differential pressure measurement

• Digital display of pressure (inches of water / Pascals)

• LED indicators for normal and alarm status

• Audible horn indicates alarm condition

• Return from power failure without operator

intervention

• Optional 2-position keyed switch disables alarms,

available in separate models enabling alarms for:

> negative pressure (infectious isolation)

> positive pressure (protective isolation)

• Control parameters assigned and changed using the

Portable Operator’s Terminal

• Proven system architecture

Description

The DPM consists of the following:

• A Liquid Crystal Display (LCD) which displays:

− State of pressure mode key switch (optional)

− Pressure monitoring mode

− High pressure alarm

− Low pressure alarm

− General failure

− Status of door switch

− Anteroom status

− Differential Pressure (In.w.c. or Pa)

• 2 LED status lights: green indicating normal

operation; red indicating alarm condition

• Audible horn with Horn silence button

• Interfaces to:

− One or two Remote Pressure Transmitters

− APOGEE LAN communication

− Portable Operator’s Terminal port

− Auxiliary alarm relay output

− 4-20 mA output of pressure

− Door switch contact

• Optional 2-position keyed switch disables alarms for

space cleaning and maintenance.

Summary of content (3 pages)

PAGE 1
Technical Specification Sheet Rev. 4, July, 2005 Differential Pressure Monitor • Return from power failure without operator intervention • Optional 2-position keyed switch disables alarms, available in separate models enabling alarms for: > negative pressure (infectious isolation) > positive pressure (protective isolation) • Control parameters assigned and changed using the Portable Operator’s Terminal • Proven system architecture Description Figure 1.
PAGE 2
• Separate keyed switch models for: > negative pressure (infectious isolation) > positive pressure (protective isolation) Monitor Specifications Power Requirements Operating Range 18-28 Vac 50/60 Hz Power Consumption 2.
PAGE 3
NOTE: DPM with 3-position Keyed Switch, 547-001, is only offered as a service replacement part. Contact your local Siemens Building Technologies office for assistance. Siemens Building Technologies, Inc. Document No.