Summer 2019, new released SA211 4-20mA output HVAC sensor
The SA211Series Transmitter senses differential pressure and converts this pressure to aproportional high level 4-20mA output. Thetransducer has been carefully calibrated before shipment to you and it shouldbe handled with the same care given any precision instrument.
The SA211 issupplied with 4 mounting tabs for wall installation. Use standard dry wall anchors with screw diameterthat are less than 3.5mm in diameter. Space dry wall anchors per the mechanical drawing above and screw thetransmitter in place. Orientation of thesensor is not of concern since the MEMS based sensor has little positionsensitivity.
The SA211 is supplied with 3 electrical terminals available for wiring. The middle center terminal should be NOTconnected. A load resistor of 250 Ω isrecommended for 24 Vdc systems with Figure 1 showing a typical electricalinstallation. . Use a supply voltagebetween 8-30Vdc for proper operation and never exceed the 32Vdc maximumvoltage. For systems requiring differentload resistors, ensure the load resistor is within green area for yourspecified supply voltage