6Safety
Safety
6-106
[Supplement]
(1) Use a 2-contact type switch for all switches.
(2) Install a limit switch on the safety fence's door. With a constantly open contact (a contact), wire to the door
switch input terminal so that the switch turns ON (is conducted) when the door is closed, and turns OFF (is
opened) when the door is open.
(3) Use a manual-return type 2b-contact for the emergency stop button.
(4) Classify the faults into minor faults (faults that are easily restored and that do not have a great effect) and
major faults (faults that cause the entire system to stop immediately, and that require care in restoration),
and wire accordingly.
[Caution] The emergency stop input(terminal block) on the user wiring in the controller can be used for safety
measures as shown in Fig. 6-1 to Fig. 6-4. Note that there are limits to the No. of switch contacts,
capacity and cable length, so refer to the following and install.
・ Switch contact ..........................................Prepare a 2-contact type.
・ Switch contact capacity........................Use a contact that operates with a switch contact capacity of
approx. 1mA to 100mA/24V.
Note1)
・ Cable length................................................ The length of the wire between the switch and terminal block
must be max. 15m or less. Please use the shield line, in case
of the cable may receive the noise etc. by other equipment,
such as servo amplifier. And, since the ferrite core is
attached as noise measures parts, please utilize.
Be sufficiently careful and wiring so that two or more emergency stop switches work
independently. Don't function only on AND conditions (Two or more emergency stop
switch status are all ON).
Note1)The minimum load electric current of the switch is more than 5mA/24V.
CAUTION
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