Lucas Relays TERMINATIONS GUIDE SRB502 Terminal designations Recommended Terminal definitions 1 x SRB500 Relay British DIN 72651 DIN 72552 Polarity 1 x Relay mounting block W2 1 86 + Start of winding 5 x 1/4" Lucar connectors W1 2 85 – End of winding to negative C1 5 87 N/O contacts C2 3 30 Switch Input C3 4 87a N/C contacts 87b N/O double contacts 87c N/O double contacts 86a Start of winding or 1st winding 86b Winding Tap or 2nd winding 88 Relay input (make-contact side) 88a 1st Output (make-contact side) 88b, c, d, e, f Other outputs (make-contact side) 88z 1st Input (make-contact) 88y, x 2nd & 3rd Input (make-contact) ™ Normally Open Contacts 15 Switched + from Battery # (output of ignition or start switch) Normally Closed Contacts 1 Ignition coil – Low voltage side ¢ Double Contacts 50 + Starter control (direct) 31 – Return to battery –ve (ground) ¡ Changeover Relay TD 12 V square wave input from ECU 51 + Positive output from Generator / Alternator 85b End of second winding 26RA ™ SRB402 12 V 20 A STANDARD 30/51 85 86 87 30/51 85 86 87 ¢ SRB400 12 V 20 A STANDARD 30/51 87A 85 86 87 30/51 85 86 87 87A ¡ SRB411 12 V 20 A STANDARD 30/51 87A 85 86 SRB420 24 V 10 A STANDARD 87 30/51 85 86 87 87A 3.2 Lucas Relays 6RA ™ SRB111 12 V 20 A NEOPRENE W1 C1 C2 SRB201 24 V 10 A STANDARD W2 C2 W1 W2 C1 C1 SRB113 12 V 20 A NEOPRENE C1 W1 C2 W2 C2 W1 W2 C1 # SRB131 12 V 20 A NEOPRENE W2 W1 C2 SRB220 24 V 10 A NEOPRENE C3 GDB GS C2 W1 W2 C3 PFK SFK ¡ SRB143 12 V 20 A STANDARD C1 W1 C2 SRB146 12 V 20 A STANDARD C3 W2 C2 W1 W2 C1 C3 SRB230 24 V 10 A NEOPRENE Split Charge Relays 39RA ™ 86 SRB600 12 V 60 A STANDARD CONTINUOUS 30 85 G SRB601 24 V 40 A STANDARD CONTINUOUS SRB631 12 V 60 A STANDARD INTERMITTENT 30 85 86 G SRB632 24 V 40 A NEOPRENE INTERMITTENT ¢ SRB630 12 V 60 A STANDARD CONTINUOUS W1 W2 C3 C2 C1 C1 W1 W2 C2 C3 SRB630 is suitable for charging two independent batteries from a single source. 4 1 Extra terminal for refrigerator operation. 9 / 0.30 9 / 0.30 a Select a splash free area to mount the 33RA relay, preferably in the engine compartment. 28 / 0.30 b Identify return of earth connection of existing batttery and link or earth the similar terminal W1 W2 of the additional batttery. 65 / 0.30 C2C1 C3 c Using the cable sizes specified connect the 33RA relay as shown in the diagram. 33RA Keep cable runs as short as possible, particularly main charging leads. Ensure insulation sleeves are 3 SRB630 fitted to all connectors. Loads over 35A (connected to the additional battery), should not be switched on when the engine is running. 1 Alternator – Warning Light Terminal 2 Main battery 2 65 / 0.30 3 Additional battery 4 Refrigerator terminal 3.3 28RA Lucas Relays j j 30 BMW, FORD, JAGUAR, 86 AUDI, BRITISH LEYLAND, CITROËN, DAIMLER BENZ, HHF, = OPEL, VOLVO (car). = MAN, KHD, MASSEY FERGUSON, PEUGEOT, PORSCHE, A 86 30 B RENAULT, SAAB, SIMCA, VOLVO & VW. ¡ B SRB500 12 V 20/30 A – x 87 86 85 87a SRB501 12 V 20/30 A – Optional 30 SRB510 24 V 10/20 A – x 30 85 86 87 87A (3) (2) (1) (5) (4) SRB511 24 V 10/20 A – Optional 87 B SRB525 12 V 20/30 A RESISTOR Optional 86 85 87a SRB535 24 V 10/20 A RESISTOR Optional 30 30 85 86 87 87A (3) (2) (1) (5) (4) B SRB506 12 V 20/30 A DIODE Optional 87 86 85 87a SRB507 24 V 10/20 A DIODE Optional 30 30 85 86/+ 87 87A (3)(2) (1) (5) (4) A SRB527 12 V 30/40 A – Optional 87 30 85 87a 86 30 85 86 87 87A (3) (2) (1) (5) (4) ™ B SRB520 12 V 30 A – Optional 87 86 85 SRB530 24 V 20 A – Optional 30 30/51 85 86 87 (3) (2) (1) (5) B SRB537 12 V 40 A RESISTOR Optional 87 86 85 30 30/51 85 86 87 (3) (2) (1) (5) B SRB539 87 12 V 70 A – Optional 86 85 SRB541 24 V 40 A – Optional 30 30/51 85 86 87 (3) (2) (1) (5) 87 B SRB540 12 V 70 A RESISTOR x 86 85 30 30/51 85 86 87 (3) (2) (1) (5) B SRB522 12 V 15 A FUSED Optional 87 86 85 SRB532 24 V 15 A FUSED Optional 30 30/51 85 86 87 (3) (2) (1) (5) 3.4 Lucas Relays 28RA j j 30 BMW, FORD, JAGUAR, 86 AUDI, BRITISH LEYLAND, CITROËN, DAIMLER BENZ, HHF, = OPEL, VOLVO (car). = MAN, KHD, MASSEY FERGUSON, PEUGEOT, PORSCHE, A 86 30 B RENAULT, SAAB, SIMCA, VOLVO & VW. ™ A SRB523 12 V 30 A – Optional 30 87 85 SRB533 24 V 20 A – Optional 86 30/51 85 86 87 (3) (2) (5)(1) B SRB526 12 V 2 x 30 A – ˚ 85 85 87 87 30 30 86 86 30/51 85 86 87 30/51 85 86 87 (3)(2) (1) (5) (3) (2) (1) (5) GDB GS ¢ B SRB521 12 V 2 x 20 A – Optional PFK 87 86 85 SFK 87a SRB531 24 V 2 x 10 A – Optional 30 30 85 86 87 87B (3) (2) (1) (5) (4) B SRB529 12 V 2 x 20 A RESISTOR x 87 86 85 87B 30 30 85 86 87 87B (3) (2) (1) (5) (4) 87 B SRB528 12 V 2 x 15 A – Optional 86 85 87 SRB538 24 V 2 x 10 A – Optional 30 30 85 86 87 87 (3) (2) (1) (5) (5) 3.5 4 Solenoids 2ST SURGE CURRENT 600 Amps – 12 Volt 250 Amps – 24 Volt CARRYING & BREAKING CURRENT 200 Amps – 12 Volt 100 Amps – 24 Volt SRB319 SRB321 12 V 24 V Insulated Earth Return Insulated Earth Return 2.3 Ohms 10.0 Ohms 4ST SURGE CURRENT 600 Amps – 12 Volt 250 Amps – 24 Volt CARRYING & BREAKING CURRENT 200 Amps – 12 Volt 100 Amps – 24 Volt SRB325 SRB341 12 V 12 V Earth Return Insulated Earth Return 2.3 Ohms 2.3 Ohms SRB333 SRB351 12 V 24 V Earth Return Insulated Earth Return 2.3 Ohms 10.0 Ohms For use with Ballasted Ignition Coil SRB335 SRB346 12 V 24 V Earth Return Earth Return 2.3 Ohms 10.0 Ohms For use with Ballasted Ignition Coil 3.6 Fuelling Relays 87 FDB501 1 15 87b Fuelling Relay GM, Vauxhall, Opel 12 V 16 A Prime time : N/A 50 30 31 Fall time : 0,5 sec max. 54-15 FDB502 30-28 31 Fuelling Relay Ford 12 V 16 A Prime time : 0,8 – 0,9 sec 1-3 15-11 Fall time : 0,5 – 0,9 sec 87 FDB503 30 31 1 Fuelling Relay Ford 12 V 16 A Prime time : N/A 15 Fall time : 0,7 – 1,1 sec 87 85b FDB504 87b GDB Fuelling Relay GM, Vauxhall, Opel 12 V 7,5 A Prime timeGS : N/A 85 30 86 PFK SFK 87 FDB505 TD 15 87b Fuelling Relay Citroën, Ferrari, Fiat, 12 V 16 A Prime time : N/A 50 30 31 Lancia, Peugeot & Seat Fall time : 0,1 – 0,5 sec 87 FDB506 1 15 87b Fuelling Relay Citroën 12 V 16 A Prime time : N/A 50 30 31 Fall time : 0,2 – 0,6 sec 87 FDB507 31 15 L Fuelling Relay VAG, VW 12 V 16 A Delay time :– P 30 120 seconds minimum after 'turn off' of terminal 15 with L & P connected 87 1 FDB508 15 31 Fuelling Relay VAG, VW 12 V 16 A Prime time : N/A 30 + max rpm control Fall time : 0,8 – 1,2 sec I Limit : 6500 rpm (4 cyl) 87 1 FDB509 15 31 Fuelling Relay VAG, VW, Audi 12 V 16 A Prime time : N/A 30 + max rpm control Fall time : 0,8 – 1,2 sec I Limit : 6500 rpm (5 cyl) 87 1 FDB510 15 31 Fuelling Relay VAG, VW, Audi 12 V 16 A Prime time : N/A 30 + max rpm control Fall time : 0,8 – 1,2 sec I Limit : 7100 rpm (5 cyl) 87 1 FDB511 15 31 Fuelling Relay VAG, VW, Audi 12 V 16 A Prime time : N/A 30 + max rpm control Fall time : 0,8 – 1,2 sec I Limit : 6700 rpm (4 cyl) 3.7 Lucas Flasher Units Guide TERMINATIONS GUIDE LUCAS TERMINALS Markings Connections ALTERNATIVE MARKINGS B, X, +, 49 Ignition Controlled Supply 1, 15, 2, 4, +49, +15, 14A, 15X, 153, H, 15A P, C Vehicle Pilot Light R, KP, 1P, 8, REP, T, KBC, 5, KBL L, 49a Direction Indicator Switch C, 2, 5, S54, 1L, 49S, 6, COM, 54L, L54, 0, CL, S C2 Trailer Pilot Light P2 , Lead –, 31 Earth (Ground) 1, 5, 31, E, Masse, Suggested Wiring Combinations To produce To produce synchronised flashing lamps alternating flashing lamps LAMPS LAMPS 14 / 0.30 14 / 0.30 14 / 0.30 14 / 0.30 14 / 0.30 87 87a 14 / 0.30 86 85 RELAY FLASHER FLASHER 30 UNIT UNIT SFB162 SFB162 14 / 0.30 49a 49a 12V Supply 12V Supply via 10A Fuse via 10A Fuse 14 / 0.30 28 / 0.30 28 / 0.30 14 / 0.30 28 / 0.30 28 / 0.30 31 49 31 49 3.8 BA B C D H S45 1 40.5 42.5 11.0 31.8 FR0331 26.0 6.0 6.7 2 40.5 43.6 31.8 25.7 19.1 PS0001 6.7 FR0332 15.5 Ignition switch 3 Key operated two position panel mounted rotary switch.