SMCD SERIES MINIATURE PUSHWHEEL SWITCHES FEATURES Miniature pushwheel switches with large visible readout characters. Models available with ESD protection - consult factory. Bi-directional snap action detent pushbutton mechanism. Black housing and drum with white printing. Gangable front and rear mounting models with spacers and side covers. Gold wiping action contacts. P.C. board options include solderable lands. SMCD SPECIFICATIONS MATERIALS Body: PPO Panel mounting hole: Height .945 (24mm) PC board: FR 4 DIN 40802 Width .315 (8mm) IEC 249-2, Contact Installed depth with p.c. board: surface gold over Short 1.260 (32mm) nickel on copper Long 1.654 (42mm) Insertion from front yes Sliding contact: Gold over nickel Insertion from rear yes on copper alloy CODES STANDARD COLORS Code positions marking Housing,Drum,Printing 111 Decimal 10 0-9 see truth tables 2 = black 3 = white 2,2,3 131 BCD 10 0-9 see truth tables 137 BCD comp 10 0-9 see truth tables 301 Hexadecimal 16 0-9, A-F(0-15) see truth tables 400 change-over 10 +,-,+,-,etc.. see truth tables T ELECTRICAL DATA Operating voltage: 40 V max. Contact load, static: 1 A max. Contact load, dynamic: 100 mA max. Contact resistance (type AK): less than 100 mOhm Other special features are available upon TECHNICAL DATA request including: Operating temperature range: -20C to 80C Factory or customer set stops (10 digit models) Electric life, min. switching cycles 1,000,000 L.E.D. illumination (transparent wheel) Actuation force, approx (oz.): 14 Red digits Weight, approx. (grams): 4 Character height: 10 digit .193 (4.9mm) Decimal point 16 digit .134 (3.4mm) Special codes or printing Audible click yes Gray housing Vibration DIN IEC 68, parts 2-6 yes See sockets at end of Pushwheel section. Shock DIN 40046, part 7 yes APEM, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info apem.com T1 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICESMCD SERIES MINIATURE PUSHWHEEL SWITCHES TRUTH TABLES CODE 131 CODE 137 CODE 301 CODE 400 CODE 111 BCD BCD COMP. CHANGE-OVER HEXADECIMAL DECIMAL C1 2 4 8 C1 2 4 8 CA+ A- 12 48 C C 0 1 2345 6789 0 0 + 0 0 1 1 - 1 1 2 2 2 + 2 3 3 3 - 3 4 4 + 4 4 5 5 - 5 5 6 6 + 6 6 7 7 7 - 7 8 8 8 + 8 9 9 - 9 9 A B C D E F n = number of switches MECHANICAL OUTLINE WITH PANEL CUT-OUT & MOUNTING PIN CONNECTIONS T The switching 131 1248C mode is 131bl+1842C- shorting - i.e. - 137 1248C even during 137bl+1248C- actuation, at 301 1248C least one output is 301bl+1248C- connected 400 + A+ C A- - to input C. 111 01 234C 5678 9 Pitch .079 (2mm) b is used AK 111bl + 01234C 5 6 7 8 9 - Pitch .067 (1.7mm) for models ordered 131 12 48 C with L.E.D. +- 301 12 48 C illumination AL 111bl 01 234C 5678 9 Pitch .079 (2mm) only. T2 APEM, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info apem.com SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE