Mitsumi electronic MR-J3- A Manual De Usuario
12 - 86
12. OPTIONS AND AUXILIARY EQUIPMENT
12.16 Surge absorbers (recommended)
A surge absorber is required for the electromagnetic brake. Use the following surge absorber or equivalent.
When using the surge absorber, perform insulation beforehand to prevent short-circuit.
When using the surge absorber, perform insulation beforehand to prevent short-circuit.
Maximum rating
Maximum
limit voltage
Static
capacity
(reference
value)
Varistor voltage
rating (range) V1mA
Permissible circuit
voltage
Surge
immunity
Energy
immunity
Rated
power
power
AC [Vma]
DC [V]
[A]
[J]
[W]
[A]
[V]
[pF]
[V]
140 180
(Note)
500/time
5 0.4
25
360
300
220
(198 to 242)
Note. 1 time 8 20 s
[Unit: mm]
13.5
1
6.
5
4.7 1.0
0.8
3.
0 o
r
le
ss
30
.0
or
m
ore
(Example) ERZV10D221 (Panasonic)
TNR-10V221K (Nippon chemi-con)
Outline drawing [mm]
(ERZ-C10DK221)
Outline drawing [mm]
(ERZ-C10DK221)
12.17 Noise reduction techniques
Noises are classified into external noises which enter the servo amplifier to cause it to malfunction and those
radiated by the servo amplifier to cause peripheral devices to malfunction. Since the servo amplifier is an
electronic device which handles small signals, the following general noise reduction techniques are required.
Also, the servo amplifier can be a source of noise as its outputs are chopped by high carrier frequencies. If
peripheral devices malfunction due to noises produced by the servo amplifier, noise suppression measures
must be taken. The measures will vary slightly with the routes of noise transmission.
(1) Noise reduction techniques
radiated by the servo amplifier to cause peripheral devices to malfunction. Since the servo amplifier is an
electronic device which handles small signals, the following general noise reduction techniques are required.
Also, the servo amplifier can be a source of noise as its outputs are chopped by high carrier frequencies. If
peripheral devices malfunction due to noises produced by the servo amplifier, noise suppression measures
must be taken. The measures will vary slightly with the routes of noise transmission.
(1) Noise reduction techniques
(a) General reduction techniques
Avoid laying power lines (input and output cables) and signal cables side by side or do not bundle
them together. Separate power lines from signal cables.
Use shielded, twisted pair cables for connection with the encoder and for control signal transmission,
and connect the shield to the SD terminal.
Ground the servo amplifier, servo motor, etc. together at one point (refer to section 3.12).
them together. Separate power lines from signal cables.
Use shielded, twisted pair cables for connection with the encoder and for control signal transmission,
and connect the shield to the SD terminal.
Ground the servo amplifier, servo motor, etc. together at one point (refer to section 3.12).
(b) Reduction techniques for external noises that cause the servo amplifier to malfunction
If there are noise sources (such as a magnetic contactor, an electromagnetic brake, and many relays
which make a large amount of noise) near the servo amplifier and the servo amplifier may malfunction,
the following countermeasures are required.
which make a large amount of noise) near the servo amplifier and the servo amplifier may malfunction,
the following countermeasures are required.
Provide surge absorbers on the noise sources to suppress noises.
Attach data line filters to the signal cables.
Ground the shields of the encoder connecting cable and the control signal cables with cable clamp
fittings.
Although a surge absorber is built into the servo amplifier, to protect the servo amplifier and other
equipment against large exogenous noise and lightning surge, attaching a varistor to the power input
section of the equipment is recommended.
Attach data line filters to the signal cables.
Ground the shields of the encoder connecting cable and the control signal cables with cable clamp
fittings.
Although a surge absorber is built into the servo amplifier, to protect the servo amplifier and other
equipment against large exogenous noise and lightning surge, attaching a varistor to the power input
section of the equipment is recommended.