Edwards Signaling 166 User Manual
www.edwardssignaling.com
P/N 11504 • REV E • REB 26MAR13
GuardSwitch™ Series 100
Non-Contact Interlock/Position Switch
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.
• Surges from coils, motors, contactors, solenoids and tungsten filaments. 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.
• Line capacitance and load capacitance. An in-line resistor can be added in series
immediately before the load to limit the inrush current. The resistor can only be
added in series with the last wire just before the load. The voltage drop and the
power rating of the resistor must also be calculated as follows:
Voltage drop = I • R
2
Watts = I
• R
( I = maximum continuous current of the load)
To verify switch operation with an ohmmeter:
Set range at 20 mega ohms (switches with triac output, set ohm range at 20 kilo
ohms). For a normally open switch, the meter will read a high impedance with the
actuator away. It will read very high to infinity range (triac switches will read high kilo
ohm to infinity range) with the actuator within sense range. You will see the opposite
reading for a normally closed switch.
Dimensions
0.31"
0.79cm
1.50"
3.81cm
0.31"
0.79cm
0.28"
0.71cm
2.13"
5.41cm
0.20" x 0.45" slot
0.51cm x 1.14cm
0.28"
0.71cm
1.35cm
Figure 1
(+)
white to positive
black to negative
(–)
0.53"
Switch
sensing face
3.50"
8.89cm
0.48" dia. spot face, 0.18" thru
1.22cm thru spot face, 0.46" thru
3.10"
7.87cm
2.09"
5.31cm
Actuator P
2.80"
7.11cm
1.75"
4.45cm
Actuator M
0.23" dia.
0.58cm
0.63"
1.60cm
0.50"
1.27cm
1.15"
2.92cm
Actuator P
points to
valid
sensing
face
Actuator M
points to
valid
sensing
face
0.45cm thru
0.59"
1.50cm
0.81"
2.06cm
1.60cm
0.18" dia.
0.63"
2.95cm
0.18"
0.46cm
1.17cm
1.16"
0.81"
2.06cm
1.91cm
0.46"
1.15"
2.92cm
0.75"
166
166-RM-01K
166-RM-06K
166-RM-08K
166-RM-12K
166-RN-01K
166-RN-06K
166-RP-06K
166-RP-12K
166-SN-06K
166_________
Installation
Use non-removable screws, bolts, or nuts to mount the switch and actuator. Do not
over-torque mounting hardware.
1. Using the following guidelines, determine a suitable mounting location:
• The switch and actuator must be within the listed sense range. See Ordering/
Electrical Specifications.
• The actuator must be aligned with the switch—labels facing the same direction.
(See Figure 1.)
Important: When mounting in proximity to ferrous material (steel), the sense
range can be reduced 50% minimum depending on the shape and type of
material. Test the switch in specific applications to determine the actual
sense range.
•When mounting on a ferrous material (steel), a 1/4" nonferrous (plastic or
aluminum) spacer may be used under the actuator and switch to restore most of
the lost gap.
•When mounting on a hinged gate or door, mount the switch and actuator at least
6" away from the hinges to achieve the maximum movement.
• The switch and actuator must move in one of the approved directions.
See Figure 2.
• The actuator can be mounted at a 90° rotation to the switch.
• The switch is polarity sensitive. Connect the white lead to positive and the black
lead to negative.
• The switch is for DC loads only.
• Do not mount for parallel actuation. An on-off-on signal may result when the
actuator passes by the switch.
2. Mount the switch on the stationary frame of the machine and connect the electrical
wiring. When mounting the switch on an ungrounded machine, connect the ground
lead to one of the mounting screws.
3. Mount the actuator on the movable guard, door, or gate.
Mounting Configurations
Figure 2
Perpendicular
Actuation
Door
Actuation
Pivot Actuation
Parallel Actuation
General Specifications
Enclosure Epoxy-coated aluminum
Temperature Range -40°F to 180°F (-40°C to 80°C)
Environmental Hermetically Sealed Contact Switch
Sealed in Polyurethane
NEMA Rating 1, 2, 3, 4, 4X, 5, 6, 12
Protection Class IP 67
Response Time 1 msec
Life Cycles 100,000 Under Full Load;
Up to 200,000,000 Under Dry Circuit
Lead Types/O.D. 18/2 SJTOW (K)/0.30" (0.76cm)
UL/CSA All Models
Best
Best
Good
Not Recommended
Three configurations are appropriate for interlock applications. The parallel
actuation can result in on/off/on signal if the actuator passes by the switch rather
File E 122942 LR89176
than coming to rest in proximity to it. This is NOT a recommended configuration for
interlock applications.
Ordering/Electrical Specifications
PART NUMBER CONTACT
1
LOAD RATING SWITCHING VOLTAGE SWITCHING CURRENT VOLTAGE SENSE RANGE
CONFIG. (DC) MAXIMUM (DC) MAXIMUM (DC) DROP NOMINAL NOMINAL NOMINAL
166-RM-01K N.C. 100W 24V@4.0A 5.0A@20V 1.5V 1.6"(4.0cm) 2.1"(5.3cm) 1'(0.3m)
166-RM-06K N.C. 100W 24V@4.0A 5.0A@20V 1.5V 1.6"(4.0cm) 2.1"(5.3cm) 6'(1.8m)
166-RM-08K N.C. 100W 24V@4.0A 5.0A@20V 1.5V 1.6"(4.0cm) 2.1"(5.3cm) 8'(2.4m)
166-RM-12K N.C. 100W 24V@4.0A 5.0A@20V 1.5V 1.6"(4.0cm) 2.1"(5.3cm) 12'(3.6m)
166-RP-06K N.C. 100W 24V@4.0A 5.0A@20V 1.5V 1.9"(4.8cm) 2.4"(6.1cm) 6'(1.8m)
166-RP-12K N.C. 100W 24V@4.0A 5.0A@20V 1.5V 1.9"(4.8cm) 2.4"(6.1cm) 12'(3.6m)
166-RN-01K N.C. 100W 24V@4.0A 5.0A@20V 1.5V Switch Only Switch Only 1'(0.3m)
166-RN-06K N.C. 100W 24V@4.0A 5.0A@20V 1.5V Switch Only Switch Only 6'(1.8m)
166-SN-06K N.O. 100W 24V@4.0A 5.0A@20V 1.5V Switch Only Switch Only 6'(1.8m)
166-P Actuator P Only
150-Z Actuator M Only
Warning— Each electrical rating is an individual maximum and cannot be exceeded!
Note: This switch cannot be used for AC applications. In DC applications it is polarity sensitive white to positive, black to negative.
1
Configuration with actuator away from the switch
2
Proximity of ferrous materials usually reduces sense range — typically by 50%. The shape and type of material cause a wide diversity of effects.
Testing is required to determine actual sense range for specific applications.
2
BREAK RANGE LEAD LENGTH
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