Orientalmotor SB50W, Operating Manual

6

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Operation/braking„repetitive„cycle

The repeated operation and braking of a motor will bring about a temperature 

increase in the motor and brake pack, thereby limiting the continuous 

operating time. Observe the repetitive cycle given in the table below for the 

operation and braking of the motion interface.

Motoryoutput

Repetitionycycle

1ytoy25yW

2ysecondsyorymore

40ytoy90yW

4ysecondsyorymore

(Ayrepetitiveycycleyofytwoysecondsyrepresentsyoperationyforyoneysecondy

andystoppingyforyoneysecond.)

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ALARM„output

The ALARM output function of the 

SB50W

 monitors the motor current to 

detect an actuation of the thermal protector. Accordingly, the ALARM output 

function is activated in the following conditions:

y

When the built-in thermal protector of the motor was actuated  

(became open).

y

When an improper connection or breakage of the power cable or motor 

cable was detected.

y

When the AC power was turned on after setting an input signal to "ON."

y

When the AC power was turned off while the motor was still running or at 

standstill.

When any of the above conditions occurs, the ALARM output of the 

SB50W

will become "OFF" and the ALARM indicator (red) will be lit (power supply 

to the motor will be cut off).

In the electromagnetic-brake type, the brake is activated in order to hold the 

load in position.

∗

ALARM indicator lamp is lit momentarily when DC power is first turned on, 

which is normal.

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z

Resetting„an„ALARM

BeforeyresettingyanyALARM,yremoveytheycauseyofytheyALARMy

(overheatingyofytheymotor,yetc.)yandyconfirmysafetyyaroundythey

equipment.

The brake release input functions as the brake release input during normal 

operation, and as the ALARM-RESET input when the ALARM output is OFF.

Set all input signals to "OFF," and then turn the ALARM-RESET input ON for 

at least 0.5 second. To restart the operation, turn the ALARM-RESET input 

OFF and wait for at least 0.5 second.

Brake release input

/

ALARM-RESET input

ALARM output

0.5 s

or more

ON or OFF

0.5 s

or more

ON or OFF

Brake release 

input

ALARM-RESET

input

Brake release 

input

ON

ON

ALARM reset

0.5 s or less

Turns 

OFF when an 

ALARM is generated.

 Occurrence of ALARM

ON

ALARMs can also be reset by reconnecting the power. Turn off the DC 

power and AC power, set all input signals to "OFF," and then turn the power 

back on.

Limiting resistance

2.7 k

Ω

 or more

24 VDC

External controller

Brake pack

GND

ALARM output

⑦

⑨

Photocoupler

Use a power source of 26.4 VDC or less, and limit the output current to  

10 mA or less.

Installing„and„wiring„in„compliance„with„„

EMC„Directive

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General

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EMC„Directive

The brake pack has been designed and manufactured for incorporation in 

general industrial machinery. The EMC Directive requires that the equipment 

incorporating this product comply with these directives.

The installation and wiring method for the motor and brake pack are the 

basic methods that would effectively allow the customer’s equipment to be 

compliant with the EMC Directive.

The compliance of the final machinery with the EMC Directive will depend 

on such factors as configuration, wiring, layout and risk involved in the 

control-system equipment and electrical parts. It, therefore, must be verified 

through EMC measures by the customer of the machinery.

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z

Applicable„standards

EMI 

Emission Tests 

EN 61000-6-4

EMS 

Immunity Tests 

EN 61000-6-2

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Installing„and„wiring„in„compliance„with„EMC„

Directive

Effective measures must be taken against the EMI that the brake pack 

may give to adjacent control-system equipment, as well as the EMS of the 

brake pack itself, in order to prevent a serious functional impediment in the 

machinery.

The use of the following installation and wiring methods will enable the 

brake pack to be compliant with the EMC Directive (the aforementioned 

compliance standards).

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Connecting„mains„filter

Install a mains filter in the power source line in order to prevent the noise 

generated within the brake pack from propagating outside via the AC input 

line.

For mains filters, use the products as shown in the below chart, or an 

equivalent.

SOSHINyELECTRICyCO.,LTD HF2010A-UPF,yNF2010A-UP
SchaffneryEMC

FN2070-10-06

Install the mains filter as close to the brake pack as possible, and use cable 

clamps and other means to secure the input and output cables firmly to the 

surface of the enclosure.

Connect the ground terminal of the mains filter to the grounding point, using 

as thick and short a wire as possible.

Do not place the AC input cable (AWG18: 0.75 mm

2

 or more) parallel with 

the mains-filter output cable (AWG18: 0.75 mm

2

 or more).

Parallel placement will reduce mains-filter effectiveness if the enclosure’s 

internal noise is directly coupled to the power-supply cable by means of stray 

capacitance.

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Wiring„the„signal„cable

For the signal cable for the brake pack, use a shielded cable of AWG28  

(0.08 mm

2

) or more in diameter, and keep it as short as possible.

To ground a shielded cable, use a metal cable clamp or similar device that 

will maintain contact with the entire circumference of the shielded cable. 

Attach a cable clamp as close to the end of the cable as possible, and connect 

it to an appropriate grounding point as shown in the figure.

Cable clamp

Shielded cable