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Standard Features
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Description |
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The Micron 4-20 mA output duty cycle transmitter tracks ON or OFF period as a percentage from 0% to 100% of total period of repetitive pulse trains. In the illustration, duty cycle is 100 x t/P. The transmitter determines duty cycle by averaging an integral number of periods over a gate time, which is selectable from 10 ms to 199.99 s. The same signal is applied to Channels A and B. The unit divides the average pulse width by the period between pulses and expresses this ratio in percent. A resolution of 1%, 0.1% or 0.01% is selectable. By selecting leading or falling pulse edges, the ON or OFF duty cycle can be transmitted. |
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The dual-channel signal conditioner used for pulse detection accepts inputs from proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickups, contact closures, and AC signals from 12 mV to 250 Vac. Jumper selections provide optimum operation for different sensor types and noise conditions. |
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Standard features of Micron transmitters include:
Easy Transmitter programming is via Micron's Instrument Setup Software, which runs on a PC under MS Windows. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Micron (P/N CBL04). |
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Duty Cycle Mode |
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Item Displayed Display Units Frequency Range Input Accuracy |
ON or OFF duty cycle of periodic pulse waveshape |
Update Rate |
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Conversion Interval Gate Time Time Before Zero Output |
Gate time + 30 ms + 0-2 signal periods |
Pulse Input |
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Types Grounding Minimum Signal Maximum Signal Noise Filter Contact Debounce |
AC, pulses from NPN, PNP transistors, contact closures, |
Analog Output |
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Output Levels Compliance, 4-20 mA Compliance, 0-10V Output Resolution Output Accuracy Output Update Rate Output Isolation |
4-20 mA and 0-10 Vdc (selectable) 10V ( 0-500 ohm load ) 2 mA ( 5 kOhm load ) 16 bits (65,536 steps) 0.02% of output span 25/sec max 250V rms working, 2.3 kV rms per 1 minute test |
Sensor Excitation Output (standard) |
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Output levels Output isolation |
5V@100 mA, 10V@120 mA, 24V@50 mA (jumper selectable) 50V from signal ground |
Dual Relay Output (standard) |
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Relay Type Load rating |
Two solid state relays, SPST, normally open, Form A 130 mA at 140 Vac or 180 Vdc |
Serial Communications (standard) |
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Signal Types Data Rates Output Isolation Serial Protocols Modbus Modes Modbus Compliance Digital Addressing |
RS232 or RS485 (half or full duplex) 300, 600, 1200, 2400, 4800, 9600, 19200 baud 250V rms working, 2.3 kV rms per 1 min test Modbus RTU, Modbus ASCII, Micron ASCII RTU or ASCII Modbus over Serial Line Specification V1.0 (2002) 247 Modbus addresses. Up to 32 devices on an RS485 line w/o a repeater. |
Power Input |
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Standard power Low power option Power frequency Power isolation Power consumption |
85-264 Vac or 90-300 Vdc (DC operation not UL approved) 10-48 Vdc or 12-30 Vac DC or 47-63 Hz 250V rms working, 2.3 kV rms per 1 min test 2W typical, 3W with max excitation output |
Mechanical |
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Case Dimensions Case Mounting Electrical Connections |
120 x 101 x 22.5 mm 35 mm rail per DIN EN 50022 Detachable screw clamp plug connectors |
Environmental |
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Operating Temperature Storage Temperature Relative Humidity Protection Cooling Required |
0°C to 55°C -40°C to 85°C 95% at 40°C, non-condensing NEMA-4X (IP-65) when panel mounted Mount transmitters so that ventilation holes are at top and bottom. Leave 6 mm (1/4") between transmitters, or blow air by means of a fan. |
Application Example of Duty Cycle Meter |
| Duty Cycle and Elapsed Time of a Laser | |
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Duty cycle can be used to indicate the ON time of a pulsed laser in relation to total time. Micron counters and transmitters can also measure elapsed time, the number of pulses, average width in µs, the number of pulses, and total energy applied. |
