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6. OPTIONS AND AUXILIARY EQUIPMENT
7)
Instrument
Noise Transmission Route
When measuring instruments, receivers, sensors, etc. which handle weak signals and may
malfunction due to noise and/or their signal cables are contained in a control box together
with the servo amplifier or run near the servo amplifier, such devices may malfunction due to
noises transmitted through the air. The following techniques are required.
(1) Provide maximum clearance between easily affected devices and the servo amplifier.
(2) Provide maximum clearance between easily affected signal cables and the I/O cables of
1) 2) 3)
(3) Avoid laying the power lines (I/O cables of the servo amplifier) and signal cables side by
(4) Insert a line noise filter to the I/O cables or a radio noise filter on the input line.
(5) Use shielded wires for signal and power cables or put cables in separate metal conduits.
When the power lines and the signal cables are laid side by side or bundled together,
magnetic induction noise and static induction noise will be transmitted through the signal
cables and malfunction may occur. The following techniques are required.
(1) Provide maximum clearance between easily affected devices and the servo amplifier.
(2) Provide maximum clearance between easily affected signal cables and the I/O cables of
4) 5) 6)
(3) Avoid laying the power lines (I/O cables of the servo amplifier) and signal cables side by
(4) Use shielded wires for signal and power cables or put the cables in separate metal
When the power supply of peripheral devices is connected to the power supply of the servo
amplifier system, noises produced by the servo amplifier may be transmitted back through the
power supply cable and the devices may malfunction. The following techniques are required.
7)
(1) Insert the radio noise filter (FR-BIF) on the power cables (Input line) of the servo
(2) Insert the line noise filter (FR-BSF01) on the power cables of the servo amplifier.
When the cables of peripheral devices are connected to the servo amplifier to make a closed
loop circuit, leakage current may flow to malfunction the peripheral devices. If so, malfunction
8)
may be prevented by disconnecting the grounding cable of the peripheral device.
5)
2)
1)
Servo
amplifier
Receiver
3)
Servo motor
Suppression Techniques
the servo amplifier.
side or bundling them together.
the servo amplifier.
side or bundling them together.
conduits.
amplifier.
6– 21
7)
7)
Sensor
power
supply
2)
6)
Sensor
4)
3)
SM
8)
6
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