features low peak clamping voltage even during severe current surges ability to repeatedly protect against surge currents in excess of 10,000 amperes convenient mounting and grounding to any at surface or to din 1 (ts-32) or din-3 (ts-35) rail cable shields are passed through and may be either grounded or not grounded at the protector vibration-proof screw-type clamp terminals flame-resistant epoxy- lled housing 1800 series ? signal and dataline protector speci cations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device perfor mance may vary over time. users should verify actual device performance in their speci c applications. bourns ? model 1800 series signal and dataline protectors are designed to protect sensitive electronic circuits and components from dam aging surge voltages and currents. their extremely fast response and low clamping voltages make them particularly suitable for the pr otection of signal and data lines associated with computer, data communication, instrumentation, broadcasting and industrial controls. they may be used directly with eia standard interfaces rs-232, rs-422, rs-423, rs-485 and with 20 ma and 50 ma instrumentation loops. the model 1800 series signal and dataline protectors are fast, rugged and capable of protecting against fast rising voltage transients as well as the severe current surges associated with lightning discharges. method of operation bourns ? model 1800 series are heavy-duty, multi-st aged protectors. a solid-state section intercepts the leading edge of the surge with sub- nanosecond response time. within microseconds a 3-pole common chambered gas tube capable of handling 20,000 ampere lightning currents operates and crowbars the surge to ground. the protector remains in the crowbar state until the surge has passed and l ine voltages return to safe levels, then automatically restores the line to normal operation. there is no need for resetting a breakeror rep lacing a fuse. application protectors are generally placed at each end of a signal or data line or current loop. in the case of daisy-chain con? gurations (such as rs-485), protectors are placed at each node. the 1820 models provide both line-to-ground and line-to-line protection and are designed to use on differ- ential signals (such as rs-422 or rs-485) and 4-20 ma current loops. 1810 models provide line-to-ground protection for two sepa rate circuits and are designed for use on ground referenced signals (such as rs-232) where the return wire is grounded at the protector. the 1811 and 1821 models provide the same protection modes for high frequency applications. related bourns protectors for outdoor applications with 1/2 inch npt ports (such as ? eld-mounted 4-20 ma transmitters), please refer to bourns ? model 1669 series protector. in this application, the mixed use of a model 1800 series protector at the controller and a model 1669 series protec tor at the ? eld is recommended. characteristics @ 25 ? surge life >100 operations with 200 amps ................................................................................................ ....... 10 x 1000 sec >10 operations with 10,000 amps .............................................................................................. ...... 8 x 20 sec dc leakage current at rated l/g voltage ....................................................................................... .... <10 amps signal/data attenuation at maximum data rate .................................................................................. . 3 db with 600 termination operating temperature .......................................................................................................................... -40 o c to + 60 oc response time.................................................................................................................. .................... 50 pico-seconds wire size ..................................................................................................................... .......................... 22-14 awg interface operating characteristics peak max. signal data voltage rate l/l l/g base model number (see below for clamp designation) protective characteristics peak clamping voltages load current typical capacitance l/g l/l series resistance each line l/l (input to output) @ 5000 amps, 8x20 sec surge and voltage rate-of-rise of 100 kv / sec l/l l/g @ 1000 amps, 8x20 sec surge and voltage rate-of-rise of 500 v / sec l/l l/g (volts) (volts) (mhz) (volts) (volts) (volts) (volts) (ma) (pf) (pf) (ohms) 20 10 10 1810-10-xx 50 25 42 21 220 2200 1200 10 10 10 4 1820-10-XX 25 25 21 21 220 3300 3300 10 20 10 50 1811-10-xx 60 30 52 26 350 45 45 10 10 10 50 1821-10-xx 30 30 26 26 350 65 65 10 30 15 8 1810-15-xx 70 35 56 28 180 1500 750 15 15 15 3 1820-15-xx 35 35 28 28 180 2300 2300 15 30 15 45 1811-15-xx 80 40 64 32 300 45 45 15 15 15 45 1821-15-xx 40 40 64 32 300 65 65 15 56 28 9 1810-28-xx 110 55 90 45 150 1100 600 22 28 28 4 1820-28-xx 55 55 45 45 150 1800 1800 22 56 28 40 1811-28-xx 120 60 45 45 250 45 45 22 28 28 40 1821-28-xx 60 60 45 45 250 65 65 22 100 50 10 1810-50-xx 178 89 156 89 100 500 300 51 50 50 4 1820-50-xx 89 89 45 45 100 800 800 51
file no. 1800sers3 p/n 1669 protector bourns p/n 1820 blk red xmtr /white /white green black red 1669 bourns + - control room i i supply power ohms 250 1-5 volts receiver e2 e3 e1 l2 l3 l1 gnd common gnd. ~ ~ ~ ~ typical connections unbalanced interface, two individual circuits, such as rs-233 rev. h 09/13 speci cations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device perfor mance may vary over time. users should verify actual device performance in their speci c applications. 1800 series ? signal and dataline protector how to order (clamp) add -a1 to base model number for din-1 clamp. (example: 1810-10-a1) p/n 1810 p/n 1810 ~~ gnd. common and/or gnd. eqpt. common xmtr gnd l1 l3 l2 e1 e3 e2 rcvr rcvr e2 e3 e1 l2 l3 l1 gnd xmtr eqpt. common and/or gnd. common gnd. ~ ~ bldg. 1 bldg. 2 balanced or differential interface, such as rs-422 p/n 1820 bldg. 2 bldg. 1 rcvr ~ ~~ ~ e2 e3 e1 l2 l3 l1 gnd eqpt. common and/or gnd. common gnd. p/n 1820 gnd. common and/or gnd. eqpt. common xmtr gnd l1 l3 l2 e1 e3 e2 current loop, 4-20 ma grounding: the 8-32 mounting screw and attached clamp, and hence the din-1 (ts-32) or din-3 (ts-35) rail, serve as the protector ground. the rail (or 8-32 mounting screw if the clamp is not used) should be connected to the facility ground via an awg #6 or larger copper wire. this wire should be as short and straight as possible. single point grounding will provide better protection and will permit the protector to be located a distance from the equipment. product dimensions e3/l3 grounding link gnd eqpt e2 e3 e1 line l1 l3 l2 48.51 (1.91) 18.80 (0.74) 83.31 (3.28) pin alignment 8-32unf-2a 9.53 (0.375) 3.18 (0.125) 2.36 (0.093) 17.80 (0.70) dimensions: mm (inches) (ts-32/en50035) din-1 rail grounding screw feed-thru(e3/l3) 49.02 (1.93) 28.96 (1.14) (ts-35/en50022) din-3 rail mounting/grounding screw 45.47 (1.79) add -a3 to base model number for din-3 clamp. (example: 1810-10-a3) dimensions: mm (inches)
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