Series MSX Pro Magnesense ® Differential Pressure Transmitter Specifications - Installation and Operating Instructions Bulletin P-MSXP-A The Series MSX Pro Magnesense ® Differential Pressure Transmitter is the professional differential pressure transmitter meeting stringent industry standards with innovative global product design. The device has exceptional stability for use in critical building performance applications with the popular versatility of our original Series MS2 Magnesense ® II transmitter. The MSX Pro simplifies the ordering process to deliver the desired configuration, which reduces product setup time. Pressure ranges of Pa, mm w.c., and in w.c. are available per device. All pressure ranges can be configured in unidirectional or bidirectional modes providing a total of 32 ranges. The MSX Pro transmitter can provide a linear pressure output or a linear velocity output with the square root extraction from the transmitter. Additional parameters have been included to expand the square root capability to calculate flow. Dual voltage and milliamp output signals can be used to provide control and equipment output signal verification. INSTALLATION Surface Mounting: Mount the transmitter on a vertical surface. The pressure sensor measurement is unaffected by orientation, but it is recommended the unit be mounted with the connections facing down to prevent moisture from entering either the pressure ports or the electrical cable entry. Attach the mounting flange to a flat surface using #8 x 1/2˝ pan head sheet metal screws. Do not over tighten. Duct Mounting (Universal model required): Mount the transmitter away from fans, corners, heating and cooling coils and other equipment that will affect the measurement of the pressure. 1. To mount the transmitter, drill a .562˝ (12.70 mm) diameter hole into the duct. 2. Screw duct probe into back of housing. Insert transmitter probe into the duct. 3. Mark location of mounting holes on duct using mounting flange as template. Drill holes. 4. Attach mounting flange to duct with #8 x 1/2˝ pan head sheet metal screws. Do not over tighten screws. 5. Place the included cap on the exterior positive pressure port. The Universal model can also be used as a standard wall mount transmitter. In this mode, do not use the duct probe and plug the port on the backside of the transmitter with the included plug. SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: ±.5% FSO for all ranges except unidirectional .5 in. @ ±1% FSO. Stability: ±1% FSO/year. Temperature Limits: -4 to 158°F (-20 to 70°C). Pressure Limits: Ranges 0 and 1: 3.6 psi max operation, 6 psi burst; Ranges 2 and 3: 6 psi max operation, 6 psi burst. Power Requirements: 10-36 VDC (2-wire), 17-36 VDC or isolated 21.6-33 VAC (3-wire). Output Signals: 4-20 mA (2-wire); 0-10 V or 0-5 V selectable (3-wire). Response Time: Instantaneous (default) or 3 s (selectable). Zero and Span Adjustments: Digital push-button. Loop Resistance: Current output: 0-1250 Ω max; Voltage output: min. load resistance 1 kΩ. Current Consumption: 21 mA max continuous. Electrical Connections: 4-wire removable European style terminal block for 16 to 26 AWG. Electrical Entry: 1/2˝ NPS thread. Cable gland included. Display (optional): 4 digit LCD. Process Connections: 1/8˝, 3/16˝, 1/4˝, 5 mm, and 6 mm ID flexible tubing. Enclosure Rating: NEMA 4X (IP66); UL 2043 (Plenum); UL94 V-0. Mounting Orientation: Pressure sensor measurement unaffected by orientation. Weight: 8.0 oz (230 g). Agency Approvals: CE. 1/2 NPSM 1-29/32 [48.43] 4-3/32 [103.98] 1-1/16 [26.92] 33/64 [13.08] 1-3/16 [30.34] 11/32 [8.56] 2-3/32 [53.34] 2-9/32 [57.79] 1-57/64 [48.10] 1-11/64 [29.92] 1-29/64 [36.75] 1-19/64 [33.02] 1-19/64 [33.02] 1-13/64 [30.48] 1-13/64 [30.48] [4] 13/64 [5.08] HOLES 3/8 [9.53] 7-9/16 [191.90] 1/2 NPSM 1-43/64 [42.50] 4-3/32 [103.98] 27/64 [10.84] 1-3/16 [30.34] 1-1/16 [26.92] 33/64 [13.08] 11/32 [8.56] 2-3/32 [53.34] 2-9/32 [57.79] 3-5/8 [92.08] 3-15/32 [88.19] 1-29/32 [48.43] Wall mount bracket Duct mount bracket DIN mount bracket OPTIONS Rangein w.c.Pa lowPa highmm w.c. Range 00.05 0.1 0.25 0.5* 15 25 40 50 60 75 100 125* 1.25 2.5 5 12* Range 10.1 0.25 0.5 1* 25 40 50 60 100 150 160 250* 2.5 5 10 25* Range 21 2 3 5* 250 300 400 500 600 750 1000 1250* 25 50 100 125* Range 310 15 25 28* 1000 1500 2000 2500 3000 4000 5000 7000* 250 350 500 700* *Indicated values are the positive full scale output values per range. DWYER INSTRUMENTS, INC. P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Phone: 219-879-8000 Fax: 219-872-9057 www.dwyer-inst.com e-mail: info@dwyermail.comELECTRICAL The MSX Pro transmitter utilizes a 2-wire 4-20 mA Current Output, or a 3-wire 0-5 V / 0-10 V Voltage Output. It is also capable of Simultaneous Current and Voltage Output. The power and signals interconnect via a removable European-style four conductor terminal block, or optionally, via the included tooless terminal block. 2-Wire 4-20 mA Current Output The connections to the transmitter are made through terminals VDC and COM on the terminal block as shown in Figure 1. The terminal block is removable and each of the terminals are labeled next to the terminal block on the circuit board. Polarity is indicated by VDC and COM. See Figure 1. The maximum receiver load resistance (RL) for a given power supply voltage (Vps) is defined by the formula: Shielded 2-wire cable is recommended for control loop wiring. Ground the shield at the power supply end only. The receiver may be connected to either the negative or positive side of the loop, whichever is most convenient. Should polarity of the transmitter or receiver be inadvertently reversed, the loop will not function properly but no damage will be done to the transmitter. The maximum length of connecting wire between the transmitter and the receiver is a function of wire size and receiver resistance. That portion of the total current loop resistance represented by the resistance of the connecting wires themselves should not exceed 10% of the receiver resistance. For extremely long runs (over 1,000 feet), it is desirable to select receivers with lower resistances in order to keep the size and cost of the connecting leads as low as possible. In installations where the connecting run is no more than 100 feet, you can use a connecting lead wire as small as No. 22 ga. 3-Wire 0-10 V and 0-5 V Voltage Output Selection of using a DC or AC power supply is made via the terminal block. See Figure 2 for DC Wiring. See Figure 3 for AC Wiring. The terminal block is removable and each of the terminals are labeled next to the terminal block on the circuit board. Positive polarity is indicated by VOUT. AC/DC selection is made via the terminal block. If the polarity of the transmitter is inadvertently reversed, the unit will not function properly, but no damage will be done to the transmitter. The minimum receiver load is 1 kΩ. The resistance due to the wire should be low compared to the receiver load resistance. While the voltage at the terminal block remains unchanged with a 10 mA current flow, resistive losses in the wiring do cause errors in the voltage delivered to the receiver. For a 1% accurate gage, the resistance of the wires should be less than 0.1% of the value of the receiver load resistance. This will keep the error caused by the current flow below 0.1%. The output across VOUT and COM will be either 0-5 V, 0-10 V depending on the DIP switch setting. See DIP Switch Settings Section for more information. DC POWER SUPPLY 10-36 VDC VA C VD C CO M VOUT CURRENT RECEIVER + - - + DC POWER SUPPLY 17-36 VDC VOLTAGE RECEIVER - + + - VA C VD C CO M VOUT AC POWER SUPPLY 21.6-33 VAC VOLTAGE RECEIVER VA C VD C CO M VOUT - + DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS. PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL RESULT. SIMULTANEOUS OUTPUTS ARE NOT DESIGNED FOR AC VOLTAGE OPERATION. CAUTION DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS. PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL RESULT. CAUTION Figure 1 Figure 2: DC wiring Figure 3: AC wiring R L = V ps - 10.0 20 mA DC If equipped, the LCD must be removed before wiring. Pull the LCD directly away from the product to remove. Reinstall the LCD after wiring is completed. NOTICESimultaneous Current and Voltage Output The terminal block is removable and each of the terminals is labeled underneath the terminal block on the circuit board. Positive polarity is indicated by VOUT. The VDC terminal and a DC power supply must be used for Simultaneous Current and Voltage Output. The voltage output and the power supply must have separate wire leads that are only joined at terminal 2 of the transmitter. Additional error may occur for the voltage output if a single wire is used or if the wires are joined at the power supply or receiver. For the current output, the maximum allowable loop resistance (wiring + receiver resistance) is dependent on the power supply. The maximum loop voltage drop must not reduce the transmitter voltage below 17 V. The maximum loop resistance (R MAX ) for a given power supply voltage (V PS ) can be calculated using the following equation: The equation uses 17.0 instead of 10.0 as seen in the equation earlier with Figure 1. This represents the minimum voltage supply which is higher on the simultaneous output configuration due to the requirements of the voltage outputs. Shielded 4-wire cable is recommended for control loop wiring. Ground the shield at the power supply end only. Should the polarity of the transmitter or receiver be inadvertently reversed, the unit will not function properly, but no damage will be done to the transmitter. For voltage outputs, the minimum receiver load is 1 kΩ. The resistance due to the wire should be low compared to the receiver load resistance. While the voltage at the terminal block remains unchanged with a 10 mA current flow, resistive losses in the wiring do cause errors in the voltage delivered to the receiver. For a 1% accurate gage, the resistance of the wires should be less than 0.1% of the value of the receiver load resistance. This will keep the error caused by the current flow below 0.1%. The output across VOUT and COM will be either 0-5 V or 0-10 V depending on the DIP switch setting. See DIP Switch Settings Section for more information. Power Supply Refer to the following tables for the required supply rating. DIP SWITCH SETTINGS DIP switch settings are marked directly on the PCBA as shown in Figure 5. Switches are factory-set, based on the order configuration. You can also use a small screwdriver or pen to change the position of the switches. Key To DIP Switch Settings Switches are numbered 1 to 8 beginning on the left. DIP Switches 1 and 2 - Unit of Measure Selection DIP Switches 1 and 2 work as a pair to select the unit of measure. VA C VD C CO M VOUT DC POWER SUPPLY 10-36 VDC VOLTAGE RECEIVER CURRENT RECEIVER +- +-- + Figure 4: Simultaneous current and voltage output wiring DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS. PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL RESULT. SIMULTANEOUS OUTPUTS ARE NOT DESIGNED FOR AC VOLTAGE OPERATION. CAUTION Figure 5 is a depiction of a 5 in w.c. pressure board. Other pressure boards, while similar, will vary from the below. NOTICE There are no hazardous voltages if supplied power is within the specified range. However, it is a good idea to shut control systems down while changing DIP switches to prevent erratic control system behavior. WARNING Current Output Supply Voltage10-36 VDC Loop Resistance0-1250 Ω Voltage Output Supply Voltage17-36 VDC 21.6 to 33 VAC isolated Minimum Output Load Resistance1000 Ω PRESSURE UNIT SELECTION - DIP SWITCH 3 IS OFF (DOWN) DIP Switch 1DIP Switch 2Unit of Measure ON ON OFF OFF ON OFF ON OFF Pa (low ranges) Pa (high ranges) mm w.c. in w.c. VELOCITY/FLOW UNIT SELECTION - DIP SWITCH 3 IS ON (UP) DIP Switch 1DIP Switch 2Unit of Measure ON ON OFF OFF ON OFF ON OFF m 3 /hr (Flow) m/s (Velocity) CFM (Flow) FPM (Velocity) Figure 5: 5 in w.c. pressure board R MAX = (V PS – 17.0) 20 mA DCDIP Switch 3 - Pressure vs Velocity/Flow Mode of Operation DIP Switch 3 toggles between pressure output vs velocity or flow output. • When the switch is in the OFF or down position, the device is in Pressure Mode. • When the switch is in the ON or up position, the device is in Velocity/Flow Mode. DIP Switch 4 - Voltage Output Range Voltage output range can be either 0-10 V or 0-5 V depending on the position of DIP Switch 4. • When the switch is in the OFF or down position, the output will be 0-10 V • When the switch is in the ON or up position, the output will be 0-5 V. DIP Switch 5 - Unidirectional vs Bidirectional Output DIP Switch 5 can be set to measure pressure in one direction (unidirectional) or in both directions (bidirectional). • When the switch is in the OFF or down direction, the transmitter will be set for uni- directional and will be 0 based (i.e. 0 to 5 in w.c.). • When the switch is in the ON or up position, the transmitter will be set for bidirectional and will be ± the maximum of the selected range (i.e. ±5 in w.c.). DIP Switch 6 - Response Time Selection DIP Switch 6 toggles to select the desired response time. • When the switch is in the OFF or down direction, the transmitter response time will be instantaneous. • When the switch is in the ON or up direction, the response time will be 3 seconds. DIP Switches 7 and 8 - Maximum Range Selection (Pressure) DIP switches 7 and 8 work as a pair to select the maximum range output of the transmitter. Use the tables below to navigate pressure range selection. Alternatively, if using the device for velocity and flow, proceed to the next section. DIP Switches 7 and 8 - Maximum Range Selection (Velocity/Flow) DIP switches 7 and 8 work as a pair to select the maximum range output of the transmitter. Use the tables below to navigate velocity and flow range selection. CALIBRATION The transmitter security feature must be unlocked before calibration is accessible. See Section Program Menu-Menu Access Security. There is a 3 second delay from the time the zero or span calibration buttons are released until the time that the change in calibration takes place. This delay is used to prevent stress related offsets on the lower ranges. Zero Calibration The zero calibration can be set by applying zero pressure to both of the pressure ports and pressing the zero button for 3 seconds. If the LCD display is present, the display will read ZERO and then sequence back to the home display. Span Calibration The span calibration function allows the pressure value to be adjusted so that the currently applied pressure is the maximum configured pressure. This will in turn set the maximum analog output at the set pressure. It is recommended that the ZERO function be applied before performing a span. Apply the maximum desired pressure to the device, press and hold span for 3 seconds. If the LCD display is present, SPAN is displayed. The span function will be processed 3 seconds after the span button is released. For a positive span, apply pressure to the positive “+” port. NOTICE Range 0 Pressure Range Selections DIP Switch 7DIP Switch 8Pa (set 1)Pa (set 2)mm w.c.in w.c. ON OFF ON OFF ON ON OFF OFF 15 25 40 50 60 75 100 125 1.25 2.5 5 12 0.05 0.1 0.25 0.5 Range 0 Pressure Range Selections DIP Switch 7DIP Switch 8 m 3 /hr (Flow) m/s (Velocity) CFM (Flow) FPM (Velocity) ON OFF ON OFF ON ON OFF OFF 1700 2700 3700 4800 5 8 11 14 850 1250 2000 2800 850 1250 2000 2800 Range 1 Pressure Range Selections DIP Switch 7DIP Switch 8 m3/hr (Flow) m/s (Velocity) CFM (Flow) FPM (Velocity) ON OFF ON OFF ON ON OFF OFF 2500 3300 5200 6800 7.5 10 15 20 1250 2000 2800 4000 1250 2000 2800 4000 Range 2 Pressure Range Selections DIP Switch 7DIP Switch 8 m3/hr (Flow) m/s (Velocity) CFM (Flow) FPM (Velocity) ON OFF ON OFF ON ON OFF OFF 6800 8600 11800 15200 20 25 35 45 4000 5600 6900 8950 4000 5600 6900 8950 Range 3 Pressure Range Selections DIP Switch 7DIP Switch 8 m 3 /hr (Flow) m/s (Velocity) CFM (Flow) FPM (Velocity) ON OFF ON OFF ON ON OFF OFF 18000 23000 30000 36000 55 70 90 107 9000 12000 15000 20000 9000 12000 15000 20000 Range 1 Pressure Range Selections DIP Switch 7DIP Switch 8Pa (set 1)Pa (set 2)mm w.c.in w.c. ON OFF ON OFF ON ON OFF OFF 25 40 50 60 100 150 160 250 2.5 5 10 25 0.1 0.25 0.5 1 Range 2 Pressure Range Selections DIP Switch 7DIP Switch 8Pa (set 1)Pa (set 2)mm w.c.in w.c. ON OFF ON OFF ON ON OFF OFF 250 300 400 500 600 750 1000 1250 25 50 100 125 1 2 3 5 Range 3 Pressure Range Selections DIP Switch 7DIP Switch 8Pa (set 1)Pa (set 2)mm w.c.in w.c. ON OFF ON OFF ON ON OFF OFF 1000 1500 2000 2500 3000 4000 5000 7000 250 350 500 700 10 15 25 28LCD DISPLAY The LCD comes with a housing cover, which contains a window. The display plugs into the pins on top of the circuit board. The LCD is 180° rotatable so that it will read properly if the device must be mounted with the connections facing up. The following error messages will appear if an LCD is present and the device is an error state. PROGRAM MENU Home Menu During normal operation, the display will be in the Home Menu and will display the current measured pressure and the engineering units. Menu Access Security By default, a PIN code is not required to enter the configuration menus. However, if access to the menus needs to be restricted, follow the steps below. 1. While in the Home Menu, press and hold the Zero and Span buttons until “PIN” is displayed. 2. Press and hold the Zero and Span buttons until the current PIN setting is displayed (default is 0000). 3. Use the Zero button to increment the selected digit (denoted by the caron ) or press the Span button to select the next digit to the right. 4. Any value between 0001 and 9999 will result in the requirement to enter the PIN each time the menu is entered. The value 0000 will disable the PIN entry requirement. 5. Press and hold the Span button until the next menu is displayed. PIN security set up is now complete. MAINTENANCE/REPAIR Upon final installation of the Series MSX Pro, no routine maintenance is required. The Series MSX Pro is not field serviceable and should be returned if repair is needed. Field repair should not be attempted and may void warranty. WARRANTY/RETURN Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact customer service to receive a Return Materials Authorization (RMA) number before shipping the product back for repair. Be sure to include a brief description of the problem plus any additional application notes. This symbol indicates waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or retailer for recycling advice. LCD Error Messages Error CodeMessage OVERThe applied pressure is 3% greater than the selected output high value causing an Over Range Error. UNDRThe applied pressure is 1% less than the selected output low value causing an Under Range Error. FAILWhen the span button is pressed, the pressure value is out of the range to allow a correct setting. ER 1The pressure applied to the sensor is beyond its ability to read. ER 2The pressure sensor is communicating but reporting an internal error. ER 3The pressure sensor is not communicating. ER 4The stored user settings are invalid. ER 5The stored factory settings are invalid. ER 6Non-volatile user memory has failed. ER 7Non-volatile factory memory has failed.POWER ON (RESET) DISPLAY ALL SEGMENTS HOME SCREEN (MODE = PRESSURE) FIRMWARE VERSION (MAY VARY) PIN MENU HOME SCREEN HOME SCREEN HOME SCREEN PRESS ZERO/VALUE BUTTON PRESS SPAN/DIGIT BUTTON HOLD ZERO/VALUE BUTTON HOLD SPAN/DIGIT BUTTON PRESS EITHER ZERO/VALUE OR SPAN/DIGIT BUTTON HOLD BOTH ZERO/VALUE AND SPAN/DIGIT BUTTON MENU LEGEND FLOW MENU VELOCITY MENU K-FACTOR MENU PRESSURE MENU (OUTPUT LOW MENU) PRESSURE MENU (OUTPUT HIGH MENU) PRESSURE MENU (ALARM LOW) PRESSURE MENU (ALARM HIGH) RESET MENU HOME SCREEN S S POWER ON (RESET) MSX PRO MAIN UI AND PRESSURE FLOWCHARTVELOCITY MENU (OUTPUT LOW MENU) VELOCITY MENU (OUTPUT HIGH MENU) RESET MENU PRESS ZERO/VALUE BUTTON PRESS SPAN/DIGIT BUTTON HOLD ZERO/VALUE BUTTON HOLD SPAN/DIGIT BUTTON PRESS EITHER ZERO/VALUE OR SPAN/DIGIT BUTTON HOLD BOTH ZERO/VALUE AND SPAN/DIGIT BUTTON MENU LEGEND HOME SCREEN POWER ON (RESET) VELOCITY MENU POWER ON (RESET) FLOW MENU (AREA) FLOW MENU (OUTPUT LOW MENU) FLOW MENU (OUTPUT HIGH MENU) RESET MENU HOME SCREEN FLOW MENU MSX PRO VELOCITY SETTINGS FLOWCHART MSX PRO FLOW SETTINGS FLOWCHARTPrinted in U.S.A. 8/20FR# 444576-10©Copyright 2020 Dwyer Instruments, Inc. 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P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Phone: 219-879-8000 Fax: 219-872-9057 www.dwyer-inst.com e-mail: info@dwyermail.comNext >