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Safety
6Safety
(3) External emergency stop connection [supplementary explanation]
(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 (normal open), 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 of normal close which have two lines 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 figure above. 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.
*1)
・ Switch contact capacity.......Use a normal open contact that operates with a switch contact
capacity of approx. 1mA to 100mA/24V.
*1)
If you connect the relay etc., rated current of the coil should use the
relay which is 100mA/24V or less. (Refer to Fig. 6-12 and Fig. 6-11)
・ 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.
The size of the wire that fits to use is shown below.
・ CR750 controller.................................. CNUSR11/12/13 connector:
AWG #26 to #16 (0.14mm
2
to 1.5mm
2
)
・ CR750 controller.................................. CNUSR2 connector:
AWG #30 to #24 (0.05mm
2
to 0.2mm
2
)
・ CR751 controller.................................. CNUSR1/2 connector:
AWG #30 to #24 (0.05mm
2
to 0.2mm
2
)
Electric specification of the emergency stop related output circuit is 100mA/24V or less. Don't connect
the equipment except for this range.
*1) The minimum load electric current of the switch is more than 5mA/24V.