CL3W-12 L-COM | Alldatasheet
Document overview
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Technical content
Features
Protection for up to three pairs of lines plus provisions for shielded cables Three-Stage protection Weatherproof ABS enclosure Removable screw terminal blocks Available in 12V, 15V and 24V models (Shown with cover removed)
Description
The AL-CL3W-xx series are high performance 3- stage weatherproof protectors that provide superior protection of differential or common mode lines from transients and surges. These units will protect up to three 4- 20 mA circuits. Provisions for use with shielded cable are provided. The first stage is comprised of a differential gas discharge tube. Stage two is a pair of current limiting series resistors and the final stage is a low capacitance diode array. The us e of three terminal differential gas discharge tubes provides superior common and differential mode protection against conducted transients versus the use of lower cost two terminal tubes. The second stage series resistance limits the power dissipation of the fast diode clamp array in the third stage. This allows time for the slower but higher power gas tubes to flash over. The diode array clamps the leading edge of fast transients to safe levels until the high power gas tubes turn on. This eliminates the d amaging leading edge spike that single stage gas tube protectors let leak through. The diode array’s low capacitance assures that the suppressor will not degrade the high -speed signals. The 3- stage design can handle higher-level transients than a protector that uses only diodes. Failsafe Feature The AL-CL3W series is designed to convert into a failsafe mode in the rare case of a catastrophic surge or lightning event. For this mode, the resistors in the second stage will fuse and portions of the diode arr ay will short. This effectively disconnects the line from sensitive equipment thus limiting damage. The units are factory repairable.
L-com, Inc. 50 High St., West Mill, 3rd Floor, Suite #30 North Andover, MA 01845 www.L-com.com E-mail: sales@L-com.com Phone: 1-800-343-1455 Fax: 1-978-689-9484 © L-com, Inc. All Rights Reserved. L-com Global Connectivity and the L-com logo are registered marks. These protectors feature a weatherproof ABS enclosure with gasketed cover and concealed mounting holes. Removable screw t erminal strips are provided on the input and output for convenience. To ease installation, the terminal strips can be removed. A ground clamp provides a tie point for earth ground. Specifications Mechanical Specifications Enclosure Material Dark Gray ABS Ground Lug 10 AWG Max. Operating Temperature -40 C (-40 F) to +80 C (+176 F) Weight .38 lbs. (.17 kg) Dimensions 6.3 x 3.15 x 2.17 (in) 160 x 80 x 55 (mm) RoHS Compliant Yes Electrical Specifications Models AL-CL3W-12 AL-CL3W-15 AL-CL3W-24 Connectors (2) Screw Terminal Blocks Stage 1 Clamping Voltage ± 90 volts Stage 2 Resistance 3.3 Ohms Stage 3 Clamping Voltage ± 15 volts ± 18 volts ± 28 volts