Features Low peak clamping voltage even during Cable shields are passed through and severe current surges Ability to repeatedly protect against surge currents in excess of 10,000 amperes Convenient mounting and grounding to any flat surface or to Din 1 (TS-32) or DIN-3 (TS-35) rail may be either grounded or not grounded at the protector Vibration-proof screw-type clamp terminals Flame-resistant epoxy-filled housing 1800 Series - Signal and Dataline Protector Bourns(R) Model 1800 Series Signal and Dataline Protectors are designed to protect sensitive electronic circuits and components from damaging surge voltages and currents. Their extremely fast response and low clamping voltages make them particularly suitable for the protection 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(R) Model 1800 Series are heavy-duty, multi-staged protectors. A solid-state section intercepts the leading edge of the surge with subnanosecond 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 line voltages return to safe levels, then automatically restores the line to normal operation. There is no need for resetting a breakeror replacing 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 configurations (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 differential signals (such as RS-422 or RS-485) and 4-20 mA current loops. 1810 models provide line-to-ground protection for two separate 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(R) Protectors For outdoor applications with 1/2 inch NPT ports (such as field-mounted 4-20 mA transmitters), please refer to Bourns(R) Model 1669 Series Protector. In this application, the mixed use of a Model 1800 Series Protector at the controller and a Model 1669 Series Protector at the field is recommended. Characteristics @ 25 C 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 C to + 60 C Response Time...................................................................................................................................... 50 pico-seconds Wire Size ............................................................................................................................................... 22-14 AWG PROTECTIVE CHARACTERISTICS INTERFACE OPERATING CHARACTERISTICS Peak Signal Voltage L/L L/G (Volts) (Volts) 20 10 10 10 20 10 10 10 30 15 15 15 30 15 15 15 56 28 28 28 56 28 28 28 100 50 50 50 Max. Data Rate (MHz) 10 4 50 50 8 3 45 45 9 4 40 40 10 4 BASE MODEL NUMBER (see below for Clamp designation) 1810-10-XX 1820-10-XX 1811-10-XX 1821-10-XX 1810-15-XX 1820-15-XX 1811-15-XX 1821-15-XX 1810-28-XX 1820-28-XX 1811-28-XX 1821-28-XX 1810-50-XX 1820-50-XX Peak Clamping Voltages @ 5000 Amps, 8x20 sec Surge and Voltage Rate-of-Rise of 100 kV / sec L/L L/G (Volts) (Volts) 50 25 25 25 60 30 30 30 70 35 35 35 80 40 40 40 110 55 55 55 120 60 60 60 178 89 89 89 @ 1000 Amps, 8x20 sec Surge and Voltage Rate-of-Rise of 500 V / sec L/L L/G (Volts) (Volts) 42 21 21 21 52 26 26 26 56 28 28 28 64 32 32 32 90 45 45 45 78 78 45 45 156 156 78 78 LOAD CURRENT (mA) 220 220 350 350 180 180 300 300 150 150 250 250 100 100 TYPICAL CAPACITANCE L/G (pF) 2200 3300 45 65 1500 2300 45 65 1100 1800 45 65 500 800 L/L (pF) 1200 3300 45 65 750 2300 45 65 600 1800 45 65 300 800 SERIES RESISTANCE Each Line L/L (Input to output) (Ohms) 10 10 10 10 15 15 15 15 22 22 22 22 51 51 Specifications 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 performance may vary over time. Users should verify actual device performance in their specific applications. 1800 Series - Signal and Dataline Protector How To Order (Clamp) Typical Connections Unbalanced Interface, Two Individual Circuits, Such as RS-233 E2 P/N 1810 L2 E3 RCVR E1 L3 GND L1 EQPT. COMMON AND/OR GND. P/N 1810 L2 GND L1 COMMON GND. (Example: 1810-10-A1) E2 RCVR FEED-THRU(E3/L3) E3 L3 ~ ~ XMTR BLDG. 2 ~ ~ BLDG. 1 Add -A1 to base model number for DIN-1 clamp. GROUNDING SCREW XMTR E1 COMMON GND. 28.96 (1.14) EQPT. COMMON AND/OR GND. 49.02 (1.93) Balanced or Differential Interface, Such as RS-422 P/N 1820 L2 E3 E1 L2 GND L1 P/N 1820 E2 E3 L3 L3 GND L1 ~ ~ E2 XMTR DIN-1 RAIL (TS-32/EN50035) BLDG. 2 ~ ~ BLDG. 1 Add -A3 to base model number for DIN-3 clamp. RCVR E1 (Example: 1810-10-A3) EQPT. COMMON AND/OR GND. COMMON GND. COMMON GND. EQPT. COMMON AND/OR GND. MOUNTING/GROUNDING SCREW Current Loop, 4-20 mA CONTROL ROOM 250 OHMS E1 L2 ~ ~ P/N 1820 E3 RED GND L1 DIN-3 RAIL (TS-35/EN50022) RED /WHITE BLACK /WHITE BOURNS 1669 L3 ~ ~ E2 POWER SUPPLY 45.47 (1.79) XMTR I GREEN BLK File No. 1800SERS3 RECEIVER 1-5 VOLTS + - I DIMENSIONS: BOURNS PROTECTOR P/N 1669 COMMON GND. MM (INCHES) 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 LINE L1 L3 L2 EQPT E2 E3 E1 GND 48.51 (1.91) 18.80 (0.74) 3.18 (0.125) 2.36 (0.093) ALIGNMENT PIN E3/L3 GROUNDING LINK 83.31 (3.28) DIMENSIONS: 9.53 (0.375) 8-32UNF-2A 17.80 (0.70) MM (INCHES) REV. I 01/15 Specifications 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 performance may vary over time. Users should verify actual device performance in their specific applications. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Bourns: 1820-10-A3 1810-28-A1 1820-28-A3 1810-28-A3 1821-28-A3 1820-28-A1 1820-10-A1 1821-10-A3 1810-15-A3