sh030106u.pdf - 第408页

11. OPT I ONS AND PER IPH ERA L EQU IPM ENT 11 - 8 7 (2) Nois e reduc tion tec hniques (a) Data line filt er (rec ommend ed) Noise ca n be prev ented by insta lling a d ata li ne filt er onto t h e enc oder ca ble, etc. …

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11. OPTIONS AND PERIPHERAL EQUIPMENT
11 - 86
Instrument Receiver
Servo
amplifier
Servo motor M
2)
2)
8)
1)
7)
7) 7)
5)
3)
4)
6)
3)
Sensor
power
supply
Sensor
Noise transmission
route
Suppression techniques
1) 2) 3)
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 cabinet 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 the servo
amplifier.
3. Avoid wiring the power lines (input/output lines of the servo amplifier) and signal lines side by side
or bundling them together.
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 the signal and power lines, or put the lines in separate metal conduits.
4) 5) 6)
When the power lines and the signal lines 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 the servo
amplifier.
3. Avoid wiring the power lines (input/output lines of the servo amplifier) and signal lines side by side
or bundling them together.
4. Use shielded wires for the signal and power lines, or put the lines in separate metal conduits.
7)
When the power supply of peripheral equipment 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.
1. Install the radio noise filter (FR-BIF(-H)) on the power lines (Input lines) of the servo amplifier.
2. Install the line noise filter (FR-BSF01/FR-BLF) on the power lines of the servo amplifier.
8)
If the grounding wires of the peripheral equipment and the servo amplifier make a closed loop circuit,
leakage current may flow through, causing the equipment to malfunction. In this case, the
malfunction may be prevented by the grounding wires disconnected from the equipment.
11. OPTIONS AND PERIPHERAL EQUIPMENT
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(2) Nois
e reduction techniques
(a) Data line filter (recommended)
Noise can be prevented by installing a data line filter onto the encoder cable, etc.
For example, ZCAT3035-1330 by TDK, ESD-SR-250 by TOKIN, GRFC-13 by Kitagawa Industries,
and E04SRM563218 by SEIWA ELECTRIC are available as data line filte
rs.
As a reference example, the impedance specifications of the ZCAT3035-1330 (TDK) are indicated
below. These impedances are reference values and not guaranteed values.
Impedance [Ω]
[Unit: mm]
Outline drawing (ZCAT3035-1330)
Loop for fixing the
cable band
Lot number
Product name
TDK
39 ± 1
34 ± 1
φ13 ± 1
φ30 ± 1
10 MHz to 100 MHz 100 MHz to 500 MHz
80 150
(b) Surge killer (recommended)
Use of a surge killer is recommended for AC relay, magnetic contactor or the like near the servo
amplifier. Use the following surge killer or equivalent.
MC
SK
Surge kille
r
Relay
Surge killer
MC
ON
OFF
This distance should be short
(within 20 cm).
(Ex
.) CR-50500 Okaya Electric Industries)
Rated
voltage
AC [V]
C
[µF ± 20%]
R
[Ω ± 30%]
Test voltage Dimensions [Unit: mm]
250 0.5 50 (1/2 W)
Between terminals: 625 V AC,
50 Hz/60 Hz 60 s
Between terminal and case:
2000 V AC
50/60 Hz 60 s
6 ± 1
300 min. 300 min.
Soldered
Band (clear) AWG 18 Twisted wire
15 ± 1
48 ± 1.5
CR-50500
6 ± 1
16 ± 1
(18.5 + 5) max.
φ3.6
φ(18.5 + 2) ± 1
Note that a d
iode should be installed to a DC relay or the like.
Maximum voltage: Not less than four times the drive voltage of the relay or
the like.
Maximum current: Not less than twice the drive current of the relay or the
like.
-+
Diode
RA
11. OPTIONS AND PERIPHERAL EQUIPMENT
11 - 88
(c)
Cable clamp fitting AERSBAN-_SET
Generally, connecting the grounding of the shielded wire to the SD terminal of the connector
provides a sufficient effect. However, the effect can be increased when the shielded wire is
connected directly to the grounding plate as shown below.
Install the grounding plate near the servo amplifier for the encoder cable. Peel part of the cabl
e
sheath to expose the external conductor, and press that part against the grounding plate with the
cable clamp. If the cable is thin, clamp several cables in a bunch.
The cable clamp comes as a set with the grounding plate.
[Unit: mm]
Cable clamp
(A, B)
Cable
Earth plate
External conductor
Clamp section diagram
40
Strip the cable sheath of
the clamped area.
cutter
cable
Dimensions
[Unit: mm]
Earth plate
(Note) M4 screw
11
3
6
C
A
622
17.5
35
35
7
24
0
-0.2
B ± 0.3
2-φ5 hole
installation hole
[Unit: mm]
Clamp section diagram
L or less 10
30
24
+ 0.3
0
Note. Screw hole for
g
roundin
g
. Connect it to the
g
roundin
g
plate of the cabinet.
Model A B C Accessory fittings Clamp fitting L
AERSBAN-DSET 100 86 30 Clamp A: 2pcs. A 70
AERSBAN-ESET 70 56 Clamp B: 1pc. B 45