Yamaha CEmarking RCX221, Supporting Supplement Manual

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Chapter 5 EXTERNAL SAFETY CIRCUIT EXAMPLES
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5.1.2.4 Overview of circuit operation
This section describes an overview of the circuit operation for each safety circuit
configuration example shown in the previous sections.
(1) During AUTO mode
The main power is supplied only when the enable switch is disabled, the controller is
in a normal state (MPRDY is ON) with no internal alarms occurring, and also all the
following conditions are met:
Conditions
• Maintenance mode switch is in AUTO (M1: open, M2: closed)
• Door switch's NC contact is closed.
• External emergency stop button's NC contact is closed.
• RPB-E emergency stop button's NC contact is closed.
c
CAUTION
Connect the RPB terminator or RPB-E to the RPB connector on the controller
front panel. If the RPB connector on the controller front panel is open, an
emergency stop occurs.
(2) During maintenance
The main power is supplied only when the door switch is disabled, the controller is
in a normal state (MPRDY is ON) with no internal alarms occurring, and also all the
following conditions are met:
Conditions
• Maintenance mode switch is in SERVICE (M1: closed, M2: open)
• External emergency stop button's NC contact is closed.
• RPB-E emergency stop button's NC contact is closed.
• RPB-E enable switch's NO contact is closed.
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CAUTION
Always disconnect the RPB terminator from the RPB connector on the
controller front panel and connect the RPB-E to the RPB connector.
5.1 External safety circuit examples