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Siemens 547 Room Pressure Monitors 547-104A

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547-104A

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Siemens' 547-104A, part of the 547 Room Pressure Monitor series, is engineered to monitor room pressure effectively. Operating on a communication protocol of P1 (FLN Trunk), this device functions within a voltage range of 18 to 32 VAC and supports input frequencies of 50 to 60 Hz, making it versatile in various settings.

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Technical specifications for 547-104A

ManufacturerSiemens
Product TypeRoom Pressure Monitor
Product Line547 Room Pressure Monitors
Part Number547-104A
Communication ProtocolP1 (FLN Trunk)
Voltage Rating18 to 32 VAC (Excitation)
Input Voltage Frequency50 to 60 Hz
IP RatingIP20/NEMA 1 (Indoor Use Only)
Operating Temperature Range0 °C to 50 °C (Electronics Only)
Storage Temperature Range-30 °C to 70 °C
Humidity Range5 to 95% RH (Non-Condensing)
Pressure Measurement Range0.5 in. WC (-/+)
Accuracy0.5% full-scale (+/-)
Output Signal0-5 Volts DC/0-10 Volts DC (3-Wire) or 4-20 milliamps (2-Wire)
Power Consumption5 W
Alarm OutputSPDT Relay, 1 A at 24 Volts DC
Housing MaterialFire-Retardant Plastic
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Siemens presents the 547-104A, a room pressure monitor optimized for reliable pressure assessments in various indoor applications. This device utilizes a communication protocol known as P1 (FLN Trunk), ensuring efficient connectivity. It operates within a voltage range of 18 to 32 VAC, with an input frequency capability of 50 to 60 Hz.

Rated for indoor use only, the monitor comes with an IP20/NEMA 1 certification, safeguarding its electronic components. It is designed to perform optimally within an operating temperature span of 0 °C to 50 °C, while it can withstand storage temperatures from -30 °C to 70 °C.

With a humidity tolerance of 5 to 95% RH, the device functions well in varied atmospheric conditions. It measures pressure accurately within a range of ±0.5 inches WC, achieving a precision of 0.5% full-scale. Users can choose from different output signals: either 0-5 V DC, 0-10 V DC (3-Wire), or 4-20 mA (2-Wire), adapting to different system requirements.

This model consumes 5 watts of power efficiently and incorporates an alarm output mechanism via a SPDT relay rated for 1 A at 24 Volts DC, enhancing its utility in critical monitoring situations. The housing is constructed from fire-retardant plastic, ensuring durability and safety in operation.