Type 1787 Current Sense Resistor Networks Page 1 of 2 Accurate Current Sensing in Multi-Range Instrumentation Type 1787 Current Sense Resistor Networks utilize Caddock's Micronox(R) resistance films and advanced high thru-put laser manufacturing capabilities to achieve many vital advantages in precision current measurement circuits, including laboratory and bench-type digital instrumentation: * The thin-profile single-package configuration replaces as many as four discrete current sense resistors. * The monolithic construction and standardized lead spacing simplify installation. * Caddock Micronox(R) resistance films provide exceptional stability for improved long-term measurement accuracy. Twelve standard models in five network arrangements provide the specific accuracy and resistance values required for a wide range of current measuring instruments and circuits. Prototype quantities of most models of the Type 1787 Current Sense Resistor Networks are available either from stock or within 6 weeks after receipt of order. Model No. 1 Power Rating Watts Resistance Values Max. Power Rating Watts Total Pkg. Fig. RA RB RC RD RA RB RC RD 1787-31 999.9 99.9 9.9 0.9 0.25 0.25 0.50 1.0 1.0 1 1787-312 999.9 99.9 9.9 0.9 0.25 0.25 0.50 1.0 1.0 1787-41 1,000 100 10 1 0.25 0.25 0.50 1.0 1787-412 1,000 100 10 1 0.25 0.25 0.50 1.0 Absolute Stability Absolute Maximum Max. % Change in Tolerance Absolute Resistance Value TC % 1 ppm/C Load Life Shelf Life 2 3 4 0.25 80 0.05 0.03 1 0.10 80 0.03 0.02 1.0 2 0.25 80 0.05 0.03 1.0 2 0.10 80 0.03 0.02 1787-5 999 99 9 N/A 0.25 0.25 0.75 N/A 0.75 3 0.25 50 0.04 0.02 1787-53 999 99 9 N/A 0.25 0.25 0.75 N/A 0.75 3 0.10 50 0.02 0.01 1787-535 999 99 9 N/A 0.25 0.25 0.75 N/A 0.75 3 0.05 50 0.02 0.01 1787-6 1,000 100 10 N/A 0.25 0.25 0.75 N/A 0.75 4 0.25 50 0.04 0.02 1787-64 1,000 100 10 N/A 0.25 0.25 0.75 N/A 0.75 4 0.10 50 0.02 0.01 1787-645 1,000 100 10 N/A 0.25 0.25 0.75 N/A 0.75 4 0.05 50 0.02 0.01 1787-13 99.9 9.9 0.9 N/A 0.25 0.50 1.0 N/A 1.0 5 0.25 100 0.05 0.03 1787-132 99.9 9.9 0.9 N/A 0.25 0.50 1.0 N/A 1.0 5 0.10 100 0.03 0.02 2 3 4 Tolerance: 5 6 7 Absolute Tolerance of RA, RB, RC, or RD when measured in accordance with proper Figure No. 1 1 Applications Engineering 17271 North Umpqua Hwy. Roseburg, Oregon 97470-9422 Phone: (541) 496-0700 Fax: (541) 496-0408 (c) 2004 Caddock Electronics, Inc. 2 2 3 3 4 5 6 7 Absolute Temperature Coefficient:1 Temperature coefficient of RA, RB, RC, or RD from 0C to +70C, referenced to +25C. 2 3 4 5 6Life: 7 Shelf Stability of RA, RB, RC, or RD for six months at shelf conditions. Storage Temperature: -55C to +85C. 4 5 Life: 6 7 Load Stability of RA, RB, RC, or RD with full power applied individually for 2,000 hours at +70C. CADDOCK e-mail: caddock@caddock.com * web: www.caddock.com For Caddock Distributors listed by country see caddock.com/contact/dist.html Sales and Corporate Office 1717 Chicago Avenue Riverside, California 92507-2364 Phone: (951) 788-1700 Fax: (951) 369-1151 28_IL119.1004 Type 1787 Current Sense Resistor Networks Page 2 of 2 Figure 2 - Model Nos. 1787-41 and 1787-412 Figure 1 - Model Nos. 1787-31 and 1787-312 1.150 .020 (29.21 .51) 1.150 .020 (29.21 .51) .090 (2.29) MAX. CADDOCK MODEL 1787-312 0421 .580 .020 (14.73 .51) .025 .002 (.64 .05) DIA. Tinned Copper PIN 1 9 900 90 1 2 RC RB RA characteristics requires that Pins 5 and 6 be shorted within .100" (2.54 mm) of the body of the network. All measurements must be made at this point. 0.9 4 3 RD .200 (5.08) .400 (10.16) .700 (17.78) installation and accurate * Correct measurement of the networks' .075 (1.91) .900 (22.86) 1.000 (25.40) 6 .025 .002 (.64 .05) DIA. Tinned Copper .250 .050 (6.35 1.27) .075 (1.91) .900 (22.86) 1.000 (25.40) 9 900 90 0.1 5 .580 .020 (14.73 .51) PIN 1 .250 .050 (6.35 1.27) .200 (5.08) .400 (10.16) .700 (17.78) .090 (2.29) MAX. CADDOCK MODEL 1787-412 0422 1 Model Nos. 1787-31 and 1787-312 are normally to be used in series with a customer purchased 0.1 wirewound resistor with Kelvin terminations. 2 1 4 3 RC RB RA RD 6 5 Model Nos. 1787-31 and 1787-312 Measurement Connections Model Nos. 1787-41 and 1787-412 Measurement Connections Resistances Resistances Kelvin Connections "R" Total Value Sense Lead P1 RA 999.9 Pin 1 Pin 1 Pin 5 * Pin 6 * Current Lead C1 Current Lead C2 Sense Lead P2 Kelvin Connections "R" Total Value Sense Lead P1 RA 1,000 Pin 1 Pin 1 Pin 5 Pin 6 Current Lead C1 Current Lead C2 Sense Lead P2 RB 99.9 Pin 1 Pin 2 Pin 5 * Pin 6 * RB 100 Pin 1 Pin 2 Pin 5 Pin 6 RC 9.9 Pin 1 Pin 3 Pin 5 * Pin 6 * RC 10 Pin 1 Pin 3 Pin 5 Pin 6 RD 0.9 Pin 1 Pin 4 Pin 5 * Pin 6 * RD 1 Pin 1 Pin 4 Pin 5 Pin 6 Figure 3 - Model Nos. 1787-5, 1787-53, and 1787-535 .850 .020 (21.59 .51) .580 .020 (14.73 .51) .025 .002 (.64 .05) DIA. Tinned Copper PIN 1 .200 (5.08) .400 (10.16) .700 (17.78) .075 (1.91) 900 90 RB .250 .050 (6.35 1.27) RC 4 CADDOCK MODEL 1787-6 0421 .580 .020 (14.73 .51) .200 (5.08) .400 (10.16) .700 (17.78) .075 (1.91) RB .250 .050 (6.35 1.27) RC .090 (2.29) MAX. CADDOCK MODEL 1787-132 0405 .580 .020 (14.73 .51) .025 .002 (.64 .05) DIA. Tinned Copper PIN 1 .250 .050 (6.35 1.27) .200 (5.08) .500 (12.70) .700 (17.78) .800 (20.32) 1 4 installation and accurate *Correct measurement of the networks' .100 (2.54) 90 10 3 2 RA 1.000 .020 (25.40 .51) .025 .002 (.64 .05) DIA. Tinned Copper PIN 1 1 Figure 5 - Model Nos. 1787-13 and 1787-132 .090 (2.29) MAX. 900 90 9 3 2 RA .850 .020 (21.59 .51) .090 (2.29) MAX. CADDOCK MODEL 1787-5 0406 1 Figure 4 - Model Nos. 1787-6, 1787-64, and 1787-645 9 0.9 2 RA characteristics requires that Pins 4 and 5 be shorted within .100" (2.54 mm) of the body of the network. All measurements must be made at this point. 3 RB RC 0.1 4 5 Model Nos. 1787-13 and 1787-132 are normally to be used in series with a customer purchased 0.1 wirewound resistor with Kelvin terminations. Model Nos. 1787-13 and 1787-132 Measurement Connections Resistances Resistances Kelvin Connections Resistances Current Lead C1 Current Lead C2 Sense Lead P2 "R" Total Value "R" Total Value "R" Total Value Sense Lead P1 RA 999 RA 1,000 RA 99.9 Pin 1 Pin 1 Pin 4 * Pin 5 * RB 99 RB 100 RB 9.9 Pin 1 Pin 2 Pin 4 * Pin 5 * RC 9 RC 10 RC 0.9 Pin 1 Pin 3 Pin 4 * Pin 5 * DIMENSIONS IN INCHES AND (MILLIMETERS) Applications Engineering 17271 North Umpqua Hwy. Roseburg, Oregon 97470-9422 Phone: (541) 496-0700 Fax: (541) 496-0408 (c) 2004 Caddock Electronics, Inc. CADDOCK e-mail: caddock@caddock.com * web: www.caddock.com For Caddock Distributors listed by country see caddock.com/contact/dist.html Sales and Corporate Office 1717 Chicago Avenue Riverside, California 92507-2364 Phone: (951) 788-1700 Fax: (951) 369-1151 28_IL119.1004