!"#$%&'()%*)+#&!#$$##((#!'+!# ? multi process control loops ? fire & security systems ? petro-chemical plants ? refineries & tank farms ,'&-*. ? 61000-4-2 (esd): air - 15kv, contact - 8kv ? 61000-4-4 (eft): 40a - 5/50ns ? 61000-4-5 (surge): 8/20s - 95a, level 4(line-gnd) & 48a, level 4(line-line) ? designed for 4-20ma current loops ? automatic reset - will not interrupt service ? permanent two-stage line pair protection ? line-to-ground (common) & line-to-line (differential) protection ? subnanosecond response time ? effective against lightning, inductive switching & esd ? module weight 160 grams (approximate) ? board weight 32 grams (approximate) ? flammability rating ul 94v-0 ? device marking: part number, logo, date code, and terminal designations for the le device the 420le/b series is a two stage transient voltage protector providing primary and secondary protection against lightning, ind uctive switching and electrostatic discharge (esd) transient threats. the first stage diverts the transient current through the groun d terminal return path and the second stage clamps the voltage to a safe level without interruption of service. the 420le/b series is designed to protect data lines from differential (line to line) and common mode (line to ground) transie nts. terminals 1 and 2, 3 and 4 for the 420le and pins 2 and 3, 4, and 5 for the 420lb are designated as line pairs. each line pair is referenced to ground. a transient voltage suppressor is connected across each line pair for differential mode protection. eac h line pair is referenced to ground. this product can also be used on telephone, signal/data lines, security, timing and control interface circuits. for most appli cations, the product should be located as close as possible to the equipment being protected. a low impedance grounding system is impor - tant to maintain a low voltage clamp between the line-to-ground connection. $' ()+/)0' $1 1#)2
2'3%+'+4))+!'%5!%+5 copyright ? protek devices 2001 specifications: protek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except jedec). design changes: protek reserves the right to discontinue product lines without notice, and that the final judgement concerning selection and specifications is the buyer?s and that in furnishing engineering and technical assistance, protek assumes no responsibility wit h respect to the selection or specifications of such products. protek devices 2929 south fair lane, tempe, az 85282 tel: 602-431-8101 fax: 602-431-2288 e-mail: sales@protekdevices.com web site: www.protekdevices.com %&5!)$$) !%#&%&5!6+!%#&5 there are five (5) terminals on the line side and five (5) terminals on the equipment side of the 420le, 4 data lines and one ground. both grounds are connected together internally. a single low impedance is ground sufficient. incoming data lines are cut or discon nected from the equipment to insert the 420le/b products. the incoming lines are to be connected to the line side terminals as the equipment s ide lines are connected to the equipment side terminals. the location of the product should be as close to the equipment as possible. the 4 20le/b series is designed with a short circuit failure mode to give maximum protection. a fuse, fussable link, or circuit breaker is recommende d for each data/signal line on the input side for those that require an open circuit failure mode. caution: a low dc resistance ground may not be a good ground. lightning contains a broad spectrum of frequencies up to 1 mhz. a low impedance path to ground at the transient frequencies is necessary. a ground strap is recommended or a #6 awg stranded wire. for wire lengths over 1.5 meters, there may be some excessive line to earth potential under severe thunderstorm conditions. 28.0 35.0 60.0 28.0 35.0 60.0 protek pa rt number maximum operating line voltage v op volts maximum leakage current @ v op i d a maximum clamping voltage (8/20s) @2,000a v c volts maximum capacitance @ 0 v, 1 mhz c pf maximum line thruput resistance r ohms 40 60 85 40 60 85 5.0 5.0 5.0 5.0 5.0 5.0 420le28 420le35 420le60 420lb28 420lb35 420LB60 2800 1500 1000 2800 1500 1000 12 12 12 12 12 12 electrical characteristics @ 25 0 c ambient temperature maximum ratings @ 25 0 c operating line current 100ma operating temperature -55 to 100 0 c storage temperature -55 to 100 0 c transient source voltage 6kv transient current (8/20s) 10ka equipment 1 2 4 gnd 3 2 1 4 gnd 3 warning: line mounting hole for #8 screw 2.25 ? max (57.2mm) 1.19 ? max (30.2mm) #6 screw 0.61 ? max (15.5mm) adhesive mylar label terminal screw terminal strip 3.8 ? max (96.5mm) 1.125 ? (28.575mm) $'+)5'#6!$%&' 3.25 ? 0.015 ? (82.6mm0.38mm) output 5 4 3 2 3.8 ? max (95.5mm) 3.0 ? max (76.2mm) 1.9 ? max (48.2mm) 0.30 ? max (7.6mm) 0.07 (17.8mm) gnd 12 15 equipment 2 5 line orientation notch continuity input 12 13 14 15 input connected to lines from out side world output connected to transmit/receiver circuits note: i/o contacts spaced at 0.156 ? (3.96 mm) centers $11#)2#6!$%&' 0.325 ? max (8.25mm)
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