BOP HIPWR 031912 2-5TABLE 2-8. PARALLEL/SERIAL PROTECT IN PORT PIN ASSIGNMENTSCONNECTOR PIN SIGNAL NAME FUNCTIONPARALLEL/SERIALPROTECT IN PORT(A2A5J1)1SD_A Anode of LED optocoupler which is part of protection circuit for parallelor series combination. Cathode of LED is connected to PARALLEL/SERIAL PROTECT OUT PORT (A2A5J2) pin 1 (see Table 2-9). Whenactivated, the optocoupler shuts down the unit. LEDs from all units of theparallel or series combination are connected in series.2PGOUT_C Collector of optocoupler transistor which is part of protection circuit forparallel or series combination. Transistor emitter is connected to PAR-ALLEL/SERIAL PROTECT OUT PORT (A2A5J2) pin 2 (see Table 2-9).When unit is operating normally, transistor is saturated. Transistors fromall units of the parallel or series combination are connected in series.3 SD_RETURN Completes return connection for the protection circuit which receivesenergy from the master unit.4 No connection5 No connection6 No connection7 GND Local power ground.8 ALLOW EXT_ERR Provides energy for the protection circuit (master unit only). Disabled atpower up to prevent shutdown during power up.TABLE 2-9. PARALLEL/SERIAL PROTECT OUT PORT PIN ASSIGNMENTSCONNECTOR PIN SIGNAL NAME FUNCTIONPARALLEL/SERIALPROTECT OUTPORT(A2A5J2)1 SD_K Cathode of LED optocoupler which is part of protection circuit for parallelor series combination. (See IN port (A2A5J1) pin 1,Table 2-8.)2 PGOUT_E Emitter of optocoupler transistor which is part of protection circuit forparallel or series combination. (See IN port (A2A5J1) pin 2,Table 2-8.)3 SD_RETURN Relayed connection, provides return for the protection circuit whichreceives energy from the master unit.4 No connection5 No connection6 No connection7 No connection8 No connection
