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Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

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TTH300 Temperature transmitter

Current can oscillate between capacitors in any distributed DC power system with the capacitor located apart and connected in parallel with wires. The capacitors and wiring inductance form an underdamped LC circuit that can ring when excited by PWM currents. The easiest way to monitor the current in the bus wiring of the drive is with a current probe. The ringing occurs if the current probe shows a large (> 10 A) quasi-sinusoidal current in the 1 to 10 kHz range. While more difficult to see in voltage, it does cause small sinusoidal voltage (few volts) to occur across the drive positive Bus (J1-3) to Gnd (J1-2) terminals. Occasional bursts of bus ringing are usually not too serious, but sustained or too frequent ringing is undesirable because high currents can cause heating of wires and capacitors. The simplest way to squelch bus ringing is to lower or change the inductance of the bus wiring with the following: a. Move the external bus capacitor closer to the drive or b. Twist the bus and ground wires between the drive and supply or c. Add extra capacitance (470 µf or more) near the drive bus terminals 12. Recommended External Bus Capacitors Aluminum electrolytic, computer-grade, screw top cans are available with panel mount hardware. The voltage rating should exceed the maximum bus voltage. Choose a cap with a 100 V rating for operation at 75 V bus nominal. The important capacitor

TWO POWER SUPPLY OPERATION 

Powering the drive control power separately from the bus power has the advantage that fault and status information is preserved when bus power is down for safety. Wire the control supply positive terminal to J1-1 (+CTRL) and the control supply negative terminal to J1-2 (Bus/Ctrl Gnd). Wire the main supply positive terminal to J1-3 and its negative terminal to J1-2. J1-2 is a shared ground for control power and main power. Separate ground wires from the two supplies should join at or near the shared drive ground pin (J1-2).The voltage range of the control supply is + 10 to + 90 V. This supply can be either unregulated or regulated. However, it must be isolated from the power line as its negative terminal is typically earthed for safety and commoned with main power negative terminal. For reliable starting, the control supply should have a peak power rating of at least 20 W. A typical continuous control power drawn by an S200 DC drive is 2 to 8 W. A single, relatively low power, low voltage supply (+ 12 V or + 24 V) can provide control power and I/O power for multiple drives. A.3 MULTI-AXIS CONSIDERATIONS In multi-axis applications, the drive’s power terminals can either be wired separately to the power supplies or paralleled locally (daisy-chained) and then wired to the power supplies. In the latter case, increase the wire size to handle the higher current. NOTE Locally paralleling the main power terminals of multiple drives parallels the internal bus capacitors of the drives (200 µf per drive). This allows the PWM currents of the drives to spread out, thereby lowering the temperature of the capacitor in the hottest drive.