1800 Series Data Line Protector INSTALLATION INSTRUCTIONS Bourns Part No. Peak Signal Voltage Series DC Resistance Per Line 1810 / 1820-10 1810 / 1820-15 1811 / 1820-28 1812 / 1820-50 10 V 15 V 28 V 50 V 10 Ω 15 Ω 22 Ω 51 Ω WARNING: Max. Short Circuit Current 220 mA 180 mA 150 mA 75 mA Recommended Fuse rating Bourns Part No. Peak Signal Voltage Series DC Resistance Per Line 200 mA 150 mA 125 mA 75 mA 1810 / 1821-10 1810 / 1821-15 1811 / 1821-28 10 V 15 V 28 V 10 Ω 15 Ω 22 Ω If maximum continuous or short circuit current may exceed specified values, a current-limiting fuse must Max. Short Circuit Current 350 mA 300 mA 250 mA Recommended Fuse rating 300 mA 300 mA 250 mA be installed between the power supply or current source and the equipment side of the protector. See above table. General Bourns® Model 1800 Series Data Line Protectors provide bidirectional protection. Therefore, they can be used in both positive and negative supply systems. Fig. 3). Cable shields can be passed through and may either be grounded or not grounded at the protector via the grounding link as shown in Fig. 4. Each 1800 Series unit protects one differential pair (see Fig. 1), or two individual data lines (see Fig. 2), or one current loop (see Place protector(s) as close as possible to the equipment to be protected. Typical Connections BLDG. 1 EQUIPMENT COMMON AND/OR GROUND BLDG. 1 BLDG. 2 COMMON GROUND COMMON GROUND EQUIPMENT COMMON AND/OR GROUND Figure 1 BALANCED OR DIFFERENTIAL INTERFACE (i.e., RS-422) EQUIPMENT COMMON AND/OR GROUND COMMON GROUND BLDG. 2 COMMON GROUND EQUIPMENT COMMON AND/OR GROUND Figure 2 UNBALANCED INTERFACE - TWO INDIVIDUAL CIRCUITS (i.e., RS-232) IMPORTANT: Common Ground = Chassis, Power and Earth Ground. However, when earth grounding of electronic common is not permissible, protector(s), including rail, may have to be isolated from earth ground via a Bourns® Model 2027-15-B Spark Gap as shown in Fig. 4. BLDG. 1 BLDG. 2 ISOLATED RAIL EQUIPMENT COMMON AND/OR GROUND Figure 4 WHEN EARTH GROUNDING IS NOT PERMISSIBLE COMMON GROUND COMMON GROUND Figure 3 CURRENT LOOP, 4-20 mA EQUIPMENT COMMON AND/OR GROUND ISOLATED COMMON BOURNS® MODEL 2027-15-B GAS DISCHARGE TUBE 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 Data Line Protector INSTALLATION INSTRUCTIONS Mounting Instructions TS-35 RAIL MOUNTING (See Figure 5) 1. Using the clamp assembly, each protector can be installed or removed without disturbing other protectors. 2. Protector establishes ground connections with the rail via the clamp assembly. Tighten screw firmly. 3. Rail must be connected to common ground. A solid or stranded No. 6 AWG tin-plated copper wire is recommended. Length to be as short as possible and not to exceed 10 feet. BUS BAR OR PLATE MOUNTING (See Figure 6) 1. Remove clamp assembly from protector. 2. Drill and tap bus bar or plate as shown. 3. Protector establishes ground connection with the bus bar or plate via the 8-32 mounting/grounding screw. Tighten firmly. 4. Bus bar or plate must be connected to common ground. A solid or stranded No. 6 AWG tin-plated copper wire is recommended. Length to be as short as possible and not to exceed 10 feet. BUSBAR PLATE RAIL E3/L3 GROUNDING LINK 19.05 (0.75) 18.80 (0.74) 83.31 (3.28) MOUNTING/GROUNDING SCREW ORILL #38 DIA. FEED-THRU (E3/L3) GROUNDING SCREW 2.57 (0.101) 9.53 (0.375) MOUNTING/ GROUNDING SCREW ORILL #29 3.45 DIA. (0.136) TAP 8-32 INF-28 FEED-THRU (E3/L3) GROUNDING SCREW 28.96 (1.14) 27.94 (1.1) 49.02 (1.93) CLAMP ASSEMBLY ALIGNMENT PIN DIA. TS-32 RAIL P/N 36213 Figure 5 TS-32 RAIL MOUNTING 23.62 (0.93) 8-32 UNF-2A 44.45 LENGTH (1.75) 3.18 (.125) 95.25 (3.75) 48.51 (1.91) Figure 6 RECOMMENDED BUS BAR OR PLATE MOUNTING Data Line Connections (See Figures 1-3) WIRE PREPARATION Minimum usable wire size is No. 24 AWG. Maximum usable wire size is No. 14 AWG. Strip insulation to 0.3 inches. LINE TERMINALS L1, L2, L3 Connect the line (field) wires which are subject to high voltage surges to protector terminals L1 and/or L2. Connect the cable shield (if any) to protector terminal L3. L3 is internally connected to E3. WARNING: Never connect field lines which are subject to high voltage surges to the protector equipment terminals E1 and/or E2. The protector may be damaged. EQUIPMENT TERMINALS E1, E2, E3 Connect the equipment to be protected to protector terminals E1 and/or E2. Connect the cable shield (if any) to protector terminal E3 unless it is desirable to float the shield at this point (see Figures 1 and 2). E3 is internally connected to L3. SHIELD GROUND OPTIONS (See Figure 4) The shield is normally grounded at the protector with the E3/L3 grounding link in position A. If the shield is to be ungrounded, move the grounding link to position B. Re-tighten mounting and grounding screws firmly. Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116 Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510 The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700 www.bourns.com 10/13 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.