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Features
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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 flat surface or to Din 1 (TS-32) or DIN-3 (TS-35) rail
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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-filled housing
1800 Series - Signal and Dataline Protector
Bourns 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 20mA and 50mA instrumentation loops. 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 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 200,000 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 breaker or 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. 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 most 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) and 4-20 mA loops 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 field-mounted 4-20mA transmitters), please refer to Bourns 1669 Series Protector. In this application, the mixed use of an 1800 Series Protector at the controller and a 1669 Series Protector at the field is recommended.
Characteristics @ 25C
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 .......................................................................................... 3db with 600 termination Operating Temperature ................................................................................................................................. -40C to + 60C 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 @ 5000 Amps, 8x20sec @ 1000 Amps, 8x20sec Surge and Voltage Surge and Voltage Rate-of-Rise of Rate-of-Rise of 100kV /sec 500 V / sec L/L L/G L/L L/G LOAD CURRENT TYPICAL CAPACITANCE SERIES RESISTANCE Each Line L/L (Input to output) L/G L/L
(Volts) 20 10 20 10 30 15 30 15 56 28 56 28 100 50
(Volts) 10 10 10 10 15 15 15 15 28 28 28 28 50 50
(MHz) 10 4 50 50 8 3 45 45 9 4 40 40 10 4
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
(Volts) 50 25 60 30 70 35 80 40 110 55 120 60 178 89
(Volts) 25 25 30 30 35 35 40 40 55 55 60 60 89 89
(Volts) 42 21 52 26 56 28 64 64 90 45 45 45 156 45
(Volts) 21 21 26 26 28 28 32 32 45 45 45 45 89 45
(mA) 220 220 350 350 180 180 300 300 150 150 250 250 100 100
(pF) 2200 3300 45 65 1500 2300 45 65 1100 1800 45 65 500 800
(pF) 1200 3300 45 65 750 2300 45 65 600 1800 45 65 300 800
(Ohms) 10 10 10 10 15 15 15 15 22 22 22 22 51 51
REV. D Specifications are subject to change without notice.
1800 Series - Signal and Dataline Protector
Typical Connections Unbalanced Interface, Two Individual Circuits, Such as RS-233
BLDG. 1 BLDG. 2
How To Order (Clamp)
Add -A1 to base model number for DIN-1 clamp. (Example: 1810-10-A1)
E2 E3 RCVR
FEED-THRU(E3/L3)
GROUNDING SCREW
XMTR
E2 E3
L2 L3
~ ~
P/N 1810
L2 L3
P/N 1810
~ ~
RCVR
E1
GND
L1
L1
GND
E1
XMTR
1.14 (28.96)
EQPT. COMMON AND/OR GND.
COMMON GND.
COMMON GND.
EQPT. COMMON AND/OR GND.
1.93 (49.02)
DIN-1 RAIL (TS-32/EN50035)
Balanced or Differential Interface, Such as RS-422
BLDG. 1 BLDG. 2
Add -A3 to base model number for DIN-3 clamp.
E2 E3 RCVR
MOUNTING/GROUNDING SCREW
~ ~
E2 XMTR E3 E1
P/N 1820
L2 L3
L2 L3
P/N 1820
(Example: 1810-10-A3)
~ ~
GND
L1
L1
GND
E1
EQPT. COMMON AND/OR GND.
COMMON GND.
COMMON GND.
EQPT. COMMON AND/OR GND.
1.79 (45.47)
DIN-3 RAIL (TS-35/EN50022)
Current Loop, 4-20 mA
CONTROL ROOM
DIMENSIONS:
I XMTR
MM (INCHES)
~ ~
E2 POWER SUPPLY 250 OHMS I RECEIVER 1-5 VOLTS E3 E1
P/N 1810
L2 L3 L1
RED
RED /WHITE
~ ~
GND
BOURNS 1669
BLK
BLACK /WHITE GREEN
File No. 1800SERS3
COMMON GND.
BOURNS PROTECTOR P/N 1669
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
GND
LINE L1 L3 L2
Asia-Pacific: TEL +886- (0)2 25624117 FAX +886- (0)2 25624116 Europe: TEL +41-41 7685555 FAX +41-41 7685510 North America: TEL +1-909 781-5500 FAX +1-909 781-5700
EQPT E2 E3 E1
1.91 (48.51) E3/L3 GROUNDING LINK 3.28 (83.31)
.74 (18.80)
.125 (3.18)
bourns.com
.375 (9.53) 8-32UNF-2A .70 (17.80) LG
.093 (2.36) ALIGNMENT PIN
Specifications are subject to change without notice.
COPYRIGHT(c) 2001, BOURNS, INC. LITHO IN U.S.A. IP 09/01 G0133

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