Dwyer Air Velocity Transmitter MS2+PAFS Series
- Product SKU: MS2+PAFS Series
- Category: Dwyer, HVAC Controls, Sensors & Switches for HVAC
Like the original Series MS, the second generation transmitter can be used as a linear
pressure output or a linear velocity output with the square root extraction done in the
transmitter. Additional parameters have been included to expand the square root capability
to include flow measurements.
BACnet® and Modbus® Communications protocol recommend limiting the number of nodes
in any segment to 32. Therefore, the transceiver may be rated at one unit load. Fractional
loads are also acceptable. The MS2 accounts as an eighth of a load on the MSTP network.
SPECIFICATIONS
Supported Baud Rates: 9600, 19200, 38400, 57600, 76800, 115200.
Data Size: 8.
Parity: None.
Stop Bits: 1.
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Typical Accuracy: ±1% FS for 0.15˝ (40 Pa), 0.25˝ (50 Pa), 0.5˝ (100 Pa), 2˝ (500
Pa), 3˝ (750 Pa), 5˝ (1250 Pa), 10˝ (2 kPa), 15˝ (3 kPa), 25˝ (5 kPa), 28˝ (6.975
kPa); ±2% FS for 0.1˝ (25 Pa), 1˝ (250 Pa), and all bi-directional ranges.
Stability: ±1% / year FSO.
Temperature Limits: 0 to 150°F (-18 to 66°C).
Pressure Limits: 1 psi max., operation; 10 psi burst.
Power Requirements: 10 to 35 VDC (2-wire), 17 to 36 VDC or isolated 21.6 to 33 VAC (3-wire).
Output Signals: 4 to 20 mA (2-wire), 0 to 5 VDC, 0 to 10 VDC (3-wire).
Response Time: Adjustable: 0.5 to 15 sec. time constant. Provides a 95% response time of 1.5 to 45 seconds.
Zero & Span Adjustments: Digital push buttons.
Loop Resistance:
Current Output: 0 to 1250 Ω max;
Voltage Output: Min. load resistance 1 kΩ.
Current Consumption: 40 mA max.
Display (Optional): 5 digit LCD.
Electrical Connections: 3-wire removable European style terminal block for 16 to 22 AWG.
Electrical Entry: 1/2˝ NPS thread.
Process Connection: 3/16˝ ID tubing (5 mm ID); Max. OD 9 mm.
Enclosure Rating: IP66.
Mounting Orientation: Diaphragm in vertical position.
Weight: 8.0 oz (230 g).
Agency Approvals: BTL, CE.
APPLICATION
• Zone control in HVAC systems
SPECIFICATIONS
Service: Air and compatible gases.
Wetted Materials: ABS/polycarbonate (UL94-5V).
Temperature Limits:
Operating: 40 to 120°F (4 to 49°C);
Storage: -40 to 140°F (-40 to 60°C).
Process Connection: 1/4˝ (6 mm) ID, 3/8˝ (10 mm) OD tubing.
Mounting Orientation: Integral flange with gasket.
Weight: 1 oz (28 g).
Like the original Series MS, the second generation transmitter can be used as a linear
pressure output or a linear velocity output with the square root extraction done in the
transmitter. Additional parameters have been included to expand the square root capability
to include flow measurements.
BACnet® and Modbus® Communications protocol recommend limiting the number of nodes
in any segment to 32. Therefore, the transceiver may be rated at one unit load. Fractional
loads are also acceptable. The MS2 accounts as an eighth of a load on the MSTP network.
SPECIFICATIONS
Supported Baud Rates: 9600, 19200, 38400, 57600, 76800, 115200.
Data Size: 8.
Parity: None.
Stop Bits: 1.
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Typical Accuracy: ±1% FS for 0.15˝ (40 Pa), 0.25˝ (50 Pa), 0.5˝ (100 Pa), 2˝ (500
Pa), 3˝ (750 Pa), 5˝ (1250 Pa), 10˝ (2 kPa), 15˝ (3 kPa), 25˝ (5 kPa), 28˝ (6.975
kPa); ±2% FS for 0.1˝ (25 Pa), 1˝ (250 Pa), and all bi-directional ranges.
Stability: ±1% / year FSO.
Temperature Limits: 0 to 150°F (-18 to 66°C).
Pressure Limits: 1 psi max., operation; 10 psi burst.
Power Requirements: 10 to 35 VDC (2-wire), 17 to 36 VDC or isolated 21.6 to 33 VAC (3-wire).
Output Signals: 4 to 20 mA (2-wire), 0 to 5 VDC, 0 to 10 VDC (3-wire).
Response Time: Adjustable: 0.5 to 15 sec. time constant. Provides a 95% response time of 1.5 to 45 seconds.
Zero & Span Adjustments: Digital push buttons.
Loop Resistance:
Current Output: 0 to 1250 Ω max;
Voltage Output: Min. load resistance 1 kΩ.
Current Consumption: 40 mA max.
Display (Optional): 5 digit LCD.
Electrical Connections: 3-wire removable European style terminal block for 16 to 22 AWG.
Electrical Entry: 1/2˝ NPS thread.
Process Connection: 3/16˝ ID tubing (5 mm ID); Max. OD 9 mm.
Enclosure Rating: IP66.
Mounting Orientation: Diaphragm in vertical position.
Weight: 8.0 oz (230 g).
Agency Approvals: BTL, CE.
APPLICATION
• Zone control in HVAC systems
SPECIFICATIONS
Service: Air and compatible gases.
Wetted Materials: ABS/polycarbonate (UL94-5V).
Temperature Limits:
Operating: 40 to 120°F (4 to 49°C);
Storage: -40 to 140°F (-40 to 60°C).
Process Connection: 1/4˝ (6 mm) ID, 3/8˝ (10 mm) OD tubing.
Mounting Orientation: Integral flange with gasket.
Weight: 1 oz (28 g).
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