www.ge-security.com/industrial ™ GuardSwitch Series 300 Interlock Switch Warning! To avoid switch failure determine the actual load of the switch circuit and 301-CT-06K 301-CT-30k take steps to protect the switch from voltage spikes, current inrush and line/load 301-CT-12K 301-DT-12K 301 capacitance using the following recommendations. 301-DT-06K 301-________ 301-CT-12K-CD 303-________ 303 • 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 beadded 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. Installation Use non-removable screws, bolts, or nuts to mount the switch and actuator. Do not Dimensions over-torque mounting hardware. 3.07'' 0.74'' 7.80cm 1.88cm 1. Position the switch and actuator so the labels are reading in the same direction 0.67'' 1.75'' (See Figure 1). 1.70cm 4.45cm 2. Mount the switch on the stationary frame of the machine and mount the actuator on 0.98'' the moveable guard, door or gate. To determine the optimum sense range, shown 0.57'' 2.49cm 1.45cm under the Ordering/Electrical Specifications for each product, attach an ohmmeter to the black and white wires. 3.07'' 7.80cm The meter should read “Infinity” with the actuator away from the switch. Bring the 0.66'' 2.13'' 1.68cm actuator toward the switch until the meter reads 0 ohms. Mark this point and bring 5.41cm the actuator closer to the switch until the meter again reads “Infinity.” Mark this 1.48'' 0.69'' point and position the actuator between the two marks. Align the actuator with the 1.75cm 3.76cm switch so the labels read in the same direction. 0.40'' 0.20'' * (For DT models, which incorporate a triac, the meter will read some resistance when 1.02cm 0.51cm the switch is “on,” and the direct current (DC) from the meter may cause the switch 0.16'' x 0.24'' to latch in the “on” state until the meter is disconnected). 0.41cm x 0.61cm slot The switch and actuator must be mounted so that the actuator moves in one of the Figure 1 approved directions (Figure 2 Mounting Configurations). Parallel actuation is NOT recommended. An on/off/on signal may result when the actuator passes by the switch rather than coming to rest in proximity to it. Actuator sensing face 3. Mounting on a ferrous material will effect the sense range a minimum of 50%. However, a 1/4" nonferrous spacer positioned under the actuator and/or switch sensing face Switch should restore most of the lost sensor range. 4. When mounting a metal switch to an ungrounded machine, connect the ground lead to one of the switch mounting screws. Mounting Configurations General Specifications Enclosure 304 Folded Stainless steel Figure 2 Temperature Range -40°F to 180°F (-40°C to 80°C) Perpendicular Door Actuation Actuation Pivot Actuation Parallel Actuation Environmental Hermetically Sealed Contact Switch Encapsulated in Polyurethane NEMA Rating 1, 2, 4, 4X, 5, 12 Protection Class IP 66 Response Time 1 msec (5.4VA); 10 msec (150VA) Life Cycles 100,000 Under Full Load; Up to 200,000,000 Under Dry Circuit Best Best Good Not Recommended Lead Types/O.D. SJTOW (K)18/2 AWG/0.30" (0.76cm) 18/4 SJTOW (K)/0.34" (0.86cm) 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 than coming UL/CSA All Models to rest in proximity to it. This is NOT a recommended configuration for safety interlock applications. File E 122942 LR89176 Accessories PART NUMBER TAMPER PROOF SCREWS & SCREWDRIVER 1953 #6 x 3/4"L Tampruf Roundhead Screw 1954 #8 x 1-1/2"L Tampruf Roundhead Screw ® 1955 Tampruf Screwdriver ® 1956 Tampruf 1/4" Drive Bit for #6 and #8 Screws Ordering/Electrical Specifications 1 2 3 PART NUMBER CONTACT LOAD RATING SWITCHING VOLTAGE SWITCHING CURRENT CONTACT NOMINAL SENSE RANGE BREAK RANGE LEAD LENGTH CONFIG. AC/DC MAXIMUM, AC/DC MAXIMUM, AC/DC RESISTANCE MAX. MIN. NOMINAL NOMINAL 301-CT-06K N.O. 2.5VA/2.5W 30V@0.08A 30V@0.08A 0.18A@13.8V 0.18A@13.8V 0.5 Ohms 0.75"(1.9cm) 0.375"(1.0cm) 1.2"(3.0cm) 6'(1.8m) 301-CT-12K N.O. 2.5VA/2.5W 30V@0.08A 30V@0.08A 0.18A@13.8V 0.18A@13.8V 0.5 Ohms 0.75"(1.9cm) 0.375"(1.0cm) 1.2"(3.0cm) 12'(3.6m) 301-CT-12K-CD DPST/2 N.O. 2.5VA/2.5W 30V@0.08A 30V@0.08A 0.18A@13.8V 0.18A@13.8V 0.5 Ohms 0.75"(1.9cm) 0.375"(1.0cm) 1.2"(3.0cm) 12'(3.6m) 301-CT-30K N.O. 2.5VA/2.5W 30V@0.08A 30V@0.08A 0.18A@13.8V 0.18A@13.8V 0.5 Ohms 0.75"(1.9cm) 0.375"(1.0cm) 1.2"(3.0cm) 30'(9.1m) triac 5 4 301-DT-06K N.O./ 150VA/NA 120V@1.25A NA 1.25A @120V NA NA 0.75"(1.9cm) 0.375"(1.0cm) 1.2"(3.0cm) 6'(1.8m) output triac 5 4 301-DT-12K N.O./ 150VA/NA 120V@1.25A NA 1.25A @120V NA NA 0.75"(1.9cm) 0.375"(1.0cm) 1.2"(3.0cm) 12'(3.6m) output Warning— Each electrical rating is an individual maximum and cannot be exceeded! 1 The part numbers 301 and 303 are the same in all respects except the cable exits 301 left and 303 right. 2 Wire Color Codes Configuration with actuator away from the switch 3 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. DPST 4 Can withstand inrush surge up to 4 amps. Voltage drop is 1.5V. Minimum Switch Current 30mA. Circuit 1 Black and White 5 Do not exceed 10 switches in series. Circuit 2 Red and Blue GE Security www.ge-security.com/industrial 12345 SW Leveton Drive Industrial Tualatin, OR 97062 Phone: 800-247-9447 Fax: 503-691-7563 ©2004 GE Security Industrial. GE Security Industrial reserves the right to change specifications without notice. � I-3895-0204 11508 Rev C