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Brand:SERVO
Type:MTS30M4-38C
Origin: the United States
Warranty: 365 days
Colour: new/used
Shipping method: Courier delivery
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LONG CABLES The DC resistance of long motor power cables steals some of the available voltage when motor current is high. The principal effect of this is some reduction in peak motor power so acceleration and deceleration times can be longer. The cable resistance has no significant effect on lower speed torque or top speed. For most applications, the loss of performance is small with cables up to the maximum cable length specification. Do not operate an S200 DC Input Drive with long cables at the lower end of the bus voltage range because too much of the available voltage is stolen by the cable resistance. For S200 AC Input Drives, the DC resistance of the motor power cable is rarely an issue because the voltage drop across the resistance is usually a small fraction of the available nominal bus voltage. For S200 DC Input Drives with long cables and demanding dynamics, the 14 AWG cable is preferred over the 18 AWG cable. Cable voltage drop vs. cable length is shown in the table below. Cable Voltage Drop vs. Length VLOSS in cable as a percent of 75 V bus Cable Length (meter) AWG 18 2 x Rphase (ohm) V line-line 0-peak at 0.866 x 18 ARMS AWG 18 cable AWG 18 cable AWG 14 cable 3 0.126 2.77 3.7 % 1.5 % 10 0.413 9.09 12.1 % 4.8 % 25 1.03 22.7 30.3 % 12.0 % 50 (50 m not recommended with DC 6/18 ARMS) N/A 24.0 % B.2 CUSTOM COMPOSITE CABLES A composite cable has both feedback and power wires within one overall cable jacket. One of the critical requirements for a composite cable is to provide a high degree of isolation between the power and feedback wires. With 240 VAC-connected drives the power wires can have up to 400 Vpeak-peak fast switching PWM waveforms that can couple to the feedback wiring. These coupled signals can cause communication errors between the Smart Feedback Device (SFD) and the drive.
Danaher Motion has developed and sells a composite cable that has very good isolation between the power and feedback sections. It is strongly recommended that this raw cable be used for custom composite cable designs. Contact your Danaher Motion sales representative for additional information. If this cable does not meet your specifications, the following are some guidelines for custom composite cable development. Due to the complexity of modeling and understanding cable coupling, a new composite cable needs to be prototyped and tested to have confidence that it will be reliable. 1) Composite cable should have double concentric feedback shields – one shield within another. The raw composite cable that has been tested and is known to work well with the S200 has the following structure: double, concentric shields around the feedback wires, plus an outer shield around the whole cable (see diagram below). This type of raw cable is strongly recommended. Testing shows double, concentric, shielding is ten times better than single shielding at reducing coupling from the power wires to the feedback data wires.
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