Omron MC4700 - European Safety Distance Formulas

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OMRON SCIENTIFIC TECHNOLOGIES INC.
Fremont CA USA
Tel: 1/888/510-4357 in USA and Canada
© OSTI 1209 PN99584-0050 Rev. E
Original Instructions
27
7 O UTPUTS 7
7.1 S AFETY OUTPUTS
7.1.1 DIN CONTROLLER AND METAL CHASSIS SOLID STATE VERSION
The 4700 system supplies two independent PNP-type, safety outputs to provide Run/Stop signals to
the guarded machine. In the machine Run state, the safety outputs are electrically conducting and
source 650 milliamps of current at 24 VDC. In the Machine Stop state, the outputs are not electrically
conducting.
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WARNING! This product is designed for use on a 24 VDC, negative ground (protective earth) electrical
system only. Never connect the 4700 system to a positive ground (p
rotective earth) system. With a positive
ground (protective earth) wiring scheme, certain simultaneous shorts of both safety outputs may not be detected
and the guarded machine may not stop resulting is severe operator injury.
7.1.2 METAL CHASSIS CONTROLLER – RELAY OUTPUT VERSION
The 4700 system supplies 1 N.O. and 1 N.C/N.O. dry relay contacts, safety outputs to provide
Run/Stop signals to the guarded machine. In the Run state the N.O. contacts are closed and will
conduct the supplied voltage. In the Machine Stop state, the N.O. contacts are open. The N.C. contact
will open in a Run state and close in a Stop state.
7.2. AUXILIARY OUTPUTS
7.2.1 DIN CONTROLLER AND METAL CHASSIS SOLID STATE VERSION
Two auxiliary outputs are provided. Auxiliary output AUX1 OUT is NPN and sinks up to 100 mA to
system ground when in the on condition. Auxiliary output AUX2 OUT is PNP and sources 250 mA at
24 VDC when in the on condition.
7.2.2 METAL CHASSIS CONTROLLER - RELAY OUTPUT VERSION
N.O./N.C. auxiliary outputs are provided. These outputs are intended for light curtain Status
indication. The auxiliary output is user configurable for Alarm mode and Follow mode.
7.2.3 AUXILIARY OUTPUT OPERATING MODES
The auxiliary outputs can be set to enter an ON condition either when:
•The safety outputs are in the machine run state (Follow Mode), or
•The 4700 system enters an alarm state (Alarm Mode).
The auxiliary output operating mode is selected by setting position 7
of Switches A and B located
under the controller cover. Refer to Table 7-1. Any mismatch between the settings of the switches will
result in an alarm conditions.