Edwards Signaling 251-F6 - Manual

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251-F6 251-F6Z-06K
251-F6Z-12K
Non-Contact Safety Interlock Switch
Installation
Use non-removable screws, bolts, or nuts to mount the switch and actuator. Do not
over-torque mounting hardware.
1. Do not wire the switch until it is mounted and tested. (See Testing/Wiring)
2. Select a mounting location where the switch and actuator can be installed with
their labels reading in the same direction. (See Figure 1.)
3. Mount the switch on the stationary frame of the machine and the actuator on the
moveable guard, door or gate.
4. For best protection against operator defeat, mount with non-removeable screws,
bolts, or nuts. (See accessories)
5. The switch and actuator must be mounted so that the actuator moves in one of
the approved directions. (See Mounting Configuration, Figure 2.)
6. Parallel actuation is NOT recommended and may cause switch failure. An on/off/
on signal may result when the magnet passes by the switch rather than coming
to rest in proximity to it. (See Mounting Configuration, Figure 2.)
7. When mounting on a hinged gate or door, mount the switch and actuator at least
6" away from the hinges so a more parallel movement is achieved.
8. The actuator can be mounted at a 90
°
rotation.
9. Keep the switch and actuator within the listed sense range (See Ordering/
Electrical Specifications).
10. Mounting on a ferrous (steel) material will reduce the sense range a minimum of
50%. A 1/4" nonferrous (plastic or aluminum) spacer installed under the
actuator and switch will restore most of the lost gap.
11. When mounting a metal switch to an ungrounded machine, connect the ground
lead to one of the switch mounting screws.
Warning! To avoid switch failure determine the actual load of the switch circuit and
take steps to protect the switch from voltage spikes, current inrush and line/load
capacitance using the following recommendations. If the installation instructions are
not followed carefully, the switch may not work properly or fulfill its failsafe function,
or it may fail prematurely.
1. Surges from coils, motors, contactors, solenoids and tungsten filaments must be
considered.
2. Transient protection, such as back-to-back zener diodes (Transorb) or an RC
network, is recommended for such loads to ensure that maximum ratings of the
switch are not exceeded.
3. Line capacitance and load capacitance must be considered. An in-line resistor can
be added to limit the inrush current.
4. The resistor can only be added in series with the last red wire just before the load.
5. The voltage drop and the power rating of the resistor must be considered.
Voltage drop = I • R
Watts = I
2 • R
( I = maximum continuous current of the load)
2.80''
7.11cm
1.15''
2.92cm
0.23''
0.58cm dia
0.53''
1.35cm
1.75''
4.45cm
0.28''
0.71cm
0.75''
1.91cm
0.63''
1.60cm
1.15''
2.92cm
0.18''
0.46cm
sensing face
sensing face
Dimensions
Figure 1
GuardSwitch ™ Series 200
Actuator
Switch
251-F6Z-14K
251-________