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325 I20618 - Subject to change. © Belimo Aircontrols (USA), Inc. Special Wiring

325 I20618 - Subject to change. © Belimo Aircontrols (USA), Inc. Special Wiring Wiring Guide Application Information and Wiring Diagrams for Belimo Products. A CLOSER LOOK… The Belimo Difference G Basic Electricity G Understanding Wiring Diagrams G Analog Outputs G Wiring Diagrams for Belimo Products G Applications G Specifications 24 VAC Transformer Line Volts 1 Common 2 + Hot AF24 US NF24 US LF24 US G G G 24 VAC Transformer 2 to 10 VDC Feedback signal Line Volts Blk (1) Common Red (2) + Hot Wht (3) Y1 Input, 2 to 10 V (4) Y2 Grn (5) U Output 2 to 10V (–) (+) Control Signal 2 to 10 VDC Standard Wiring 2 3 1 5 ® 1 2 4 24 VAC Transformer The indication of direction is valid for switch position 1. Blk (1) Common Red (2) + Wht (3) + 1 2 Provide overload protection Notes: Line Volts – 1 0 G 24 VAC Transformer Line Volts 1 Common 2 + Hot 3 Input, 2 to 6 V 4 Output (–) (+) Control Signal 0 to 10 VDC 4 2 3 1 IRM-100 G G G 1 Common 2 + Hot 3 Input, 6 to 10 V 4 Output 3 500Ω IRM A Adjusted for 2 to 6 VDC range. IRM B Adjusted for 6 to 10 VDC range. IRM-100 1 Common 2 + Hot 3 Y1 Input, 2 to 10 V 4 Y2 5 U 3 LMB24-SR GMB24-SR NF24-SR US AF24-SR US LMB24-SR GMB24-SR NF24-SR US AF24-SR US G G G G 1 Common 2 + Hot 3 Y1 Input, 2 to 10 V 4 Y2 5 U 3 ACTUATOR A Adjusted for 2 to 6 VDC range. ACTUATOR B Adjusted for 6 to 10 VDC range. mA VDC 4 2 5 2.5 6 3 7 3.5 8 4 9 4.5 10 5 11 5.5 12 6 13 6.5 14 7 15 7.5 16 8 17 8.5 19 9.5 20 10 IRM-100 Voltage Settings Based on 4 to 20 mA Signal 2 1 Provide overload protection and disconnect as required. Actuator and controller must have separate transformers. Consult controller instruction data for more detailed installation information. 500Ωresistor if signal provided is 4 to 20 mA 3 4 326 I20618 - Subject to change. © Belimo Aircontrols (USA), Inc. Wiring Guide INDEX I. BASIC ELECTRICITY A. Abbreviations .....................................................................................................................327 B. Current ...............................................................................................................................327 C. Voltage ...............................................................................................................................327 D. Resistance .........................................................................................................................327 E. Ohm’s Law .........................................................................................................................327 F. Power .................................................................................................................................327 G. Power Calculations ............................................................................................................327 H. Series Connection of Resistors..........................................................................................328 I. Parallel Connection of Resistors........................................................................................328 J. Impedance .........................................................................................................................328 K. Power Consumption...........................................................................................................328 L. Wire Sizing.........................................................................................................................329 M. Multi-conductor Wire Types ...............................................................................................330 N. Ground Loops ....................................................................................................................330 II. UNDERSTANDING WIRING DIAGRAMS A. Electrical Symbols..............................................................................................................331 B. Compatibility of Different Power Supplies..........................................................................331 C. Connection of Actuators.....................................................................................................332 D. Long Distance Wiring.........................................................................................................334 E. Wiring Mistakes..................................................................................................................334 III. ANALOG OUTPUTS A. 2 to 10 V Analog Output ....................................................................................................335 B. Sourcing 4 to 20 mA Analog Output ..................................................................................335 C. Sinking 4 to 20 mA Analog Output ....................................................................................335 D. Parallel Operation ..............................................................................................................336 E. Master-Slave Operation .....................................................................................................336 F. Remote Position Monitoring...............................................................................................336 G. One Output/Multiple Transformer ......................................................................................336 IV. WIRING DIAGRAMS FOR BELIMO PRODUCTS A. On/Off Control, 24V ...........................................................................................................337 B. On/Off Control, 120/230V ..................................................................................................337 C. Floating Point Control, 24V................................................................................................338 D. Floating Point Control,120/230V ........................................................................................338 E. Proportional Control, 24V...................................................................................................339 F. Proportional Control, 120/230V..........................................................................................339 G. Multi-Function Technology Control .................................................................................................340 H. 0 to 135ΩControl...............................................................................................................341 I. Auxiliary Switch Wiring.......................................................................................................342 J. Accessories........................................................................................................................343 V. APPLICATIONS A. Wiring for Multiple Actuators on a Single Shaft .................................................................345 E. Floating Point Control Using Proportional Spring Return Actuators..................................347 F. Operating Two 2 to 10 VDC Actuators with the Higher of Two Control Signals ...............347 G. Minimum Position with 0 to 10 VDC Actuators..................................................................347 H. Wiring to Johnson Controls A350P Controller ...................................................................347 I. Wiring to Honeywell T775 Controller .................................................................................348 ® 327 I20618 - Subject to change. © Belimo Aircontrols (USA), Inc. Special Wiring Basic Electricity I. BASIC ELECTRICITY I-A. Abbreviations DC = Direct Current AC = Alternating Current VDC = Direct Current Voltage VAC = Alternating Current Voltage I-B. Current A = Ampere mA = Milliampere = Thousandths of an ampere. (Example: 12mA = 12/1000 = .012A) I = The symbol for current in mathematical formulas. I-C. Voltage V = Volt* mV = Millivolt = Thousandths of a volt. (Example: 5mV = 5/1000 = .005V) E = The symbol for voltage in mathematical formulas. I-D. Resistance Ω = Ohm = Resistance kΩ = Kilo ohm = Thousands of ohms. 1kΩ= 1,000Ω MΩ = Mega ohm = Millions of ohms. 1MΩ= 1,000kΩ= 1,000,000Ω R = The symbol for resistance in mathematical formulas. I-E. OHM's Law E = Voltage I = Current R = Resistance E = I x R Example: I = 20mA, R = 500Ω Therefore, E = .020 x 500 = 10V R = E/I Example: E = 1.35V, I = 10mA Therefore, R = 1.35/.010 = 135Ω I = E/R Example: E = 120V, R = 50Ω Therefore, 120/50 = 2.4A I-F. Power W = Watt* mW = Milliwatt = Thousandths of a watt (Example: 7mW = 7/1000 = .007W) kW = Kilowatt = Thousands of watts (Example: 1kW = 1,000W) I-G. Power Calculations W = E x I Example: V = 24V, I = 260mA Therefore, W = 24 x .260 = 6.24W W = R x I2 Example 1: R = 100Ω, I = 3A W = 100 x 32 = 100 x 3 x 3 = 900W Example 2: R = 500Ω, I = 20mA = .020A W = 500 x .0202 = 500 x .020 x .020 = 500 x .0004 = .2W or 200mW. W = E2/R Example: V = 24V, R = 100, Therefore, W = 242/100 = 24 x 24/100 = 5.76W * I.S.O. standard indicates “U” be used for voltage and “P” for power. ® 328 I20618 - Subject to change. © Belimo Aircontrols (USA), Inc. I-H. Series Connection of Resistors Resistors that are connected in series have a total resistance value that is equal to the sum of all the resistance values of the resis- tors. Example: R1 = 200Ω R2 = 250Ω R3 = 1.0kΩ RTotal = R1 + R2 + R3 = 200Ω+ 250Ω+ 1.0KΩ= 1.45kΩ I-I. Parallel Connection of Resistors If all the resistors have the same resistance value, the total resistance will be equal to the resistance value of one resistor divided by the number of resistors. Example: Five equal resistors R = 100k are con- nected in parallel. The total resistance RTotal = R/5 = 100/5 = 20k If the resistors that are connected in parallel have different values, the following formula must be used: Example: R1 = 200 R2 = 250 R3 = 1.0k I-J. Impedance The expression “impedance” is used in the BELIMO literature in the following way: • Input impedance: The input circuit of a control device, based on its circuitry, has a certain electrical resistance. The value of this resistance determines how much current the device will draw from the controller. This value must be taken into consider- ation when connecting any device to a controller output. Example: “Input impedance 100 kΩ.” This means that the DC resist- ance between the input (Y or Y1) and common (COM) is 100 kΩ(100,000 ohm). When the signal is 10 VDC, using Ohm’s Law (I=E/R), the current draw on the output of the controller will be (10V/100,000 Ω) = .0001A = .1 mA for each actuator that is connected to the signal. The combined input impedance must be higher than the controller output impedance. • Output impedance: The output of a controller has a limited amount of current capacity to supply to the devices it is control- ling. The capacity can be given in one of 2 ways. One way is by stating it as “Maximum output current .2 mA.” The other is by giving its output impedance. The output impedance must always be lower than the combined input impedance of the devices being controlled. Example I: “Output impedance 1000Ωminimum.” This means that the combined input impedance of the devices being con- trolled must be greater than 1000Ω. Example II: “Maximum output current .2 mA.” Based on a 0 to 10 VDC control signal, the output impedance would be equal to R=E/I or (10V)/(.0002A) = 50kΩ In general, the higher the input impedance, the lower the current draw, therefore less strain on the controller output. The lower the output impedance, the more current available; the more current available, the more devices can be controlled. I-K. Power Consumption (W) / Volt Amperes (VA) When a device is powered with direct current (DC), or alternating current (AC) into a pure resistive load (bulb, heater, etc.), the rated power consumption is watts (W) and is the product of the current (I) and voltage (E), (W = E x I). R1=200Ω R TOTAL = 1.45kΩ R2=250Ω R3=1.0kΩ The total resistance is always larger than the largest single resistor! 100k 100k 100k 100k 100k R TOTAL = 20k R1 R TOTAL R2 R3 1 1 1 1 _______ = ____ + ____ + ____ R1 R2 R3 RTOTAL uploads/s3/ a-closer-look-wiring-guide.pdf