12LS Controller Installation and Operation Manual, Rev 3 ... - Watlow

WARNINGANAFAZE HAS MADE EFFORTS TO ENSURE THE RELIABILITY AND SAFETY OFTHE 12LS AND PROVIDE RECOMMENDATIONS FOR ITS SAFE USE IN SYSTEMSAPPLICATIONS. PLEASE NOTE THAT IN ANY APPLICATION, FAILURES CANOCCUR THAT WILL RESULT IN FULL CONTROL OUTPUTS OR OTHEROUTPUTS THAT MAY CAUSE DAMAGE OR UNSAFE CONDITIONS IN THEEQUIPMENT OR PROCESS CONNECTED TO THE ANAFAZE 12LS.GOOD ENGINEERING PRACTICES, ELECTRICAL CODES, AND INSURANCEREGULATIONS REQUIRE INDEPENDENT, EXTERNAL, SAFETY DEVICES BEUSED TO PREVENT POTENTIALLY DANGEROUS OR UNSAFE CONDITIONSASSUMING THAT THE ANAFAZE 12LS CAN FAIL WITH OUTPUTS FULL ON, OROUTPUTS FULL OFF, OR OTHER CONDITIONS THAT WOULD BE UNEXPECTED.THE 12LS INCLUDES A RESET CIRCUIT THAT WILL SET THE CONTROLOUTPUTS OFF OR TO THE DATA STORED IN MEMORY IF THEMICROPROCESSOR RESETS -- NORMALLY THE RESULT OF A POWER FAILUREAND POWER RETURN. IF THERE IS ANY POSSIBILITY THAT A RESTARTBASED ON MEMORY WILL BE UNSAFE, THE 12LS MUST BE PROGRAMMED TOSTART WITH OUTPUTS OFF. FOR ADDITIONAL SAFETY, THE COMPUTER OROTHER HOST DEVICE SHOULD BE PROGRAMMED TO AUTOMATICALLYRELOAD THE DESIRED OPERATING CONSTANTS, OR SAFE VALUES FOR THEPROCESS, UPON RETURN OF SYSTEM POWER. IN ANY EVENT, THESE SAFETYFEATURES DO NOT ELIMINATE THE NEED TO PROVIDE EXTERNAL,INDEPENDENT SAFETY DEVICES IN POTENTIALLY DANGEROUS OR UNSAFECONDITIONS.ANAFAZE ALSO OFFERS ANASOFT, AN OPTIONAL SOFTWARE PROGRAM FORIBM PC COMPATIBLE COMPUTERS THAT WILL RELOAD THE 12LS WITH THECURRENT VALUES IN THE COMPUTER MEMORY UPON A RESET. THE USERMUST INSURE THAT THIS WILL BE SAFE FOR THE PROCESS. AGAIN, USINGTHIS FEATURE STILL DOES NOT ELIMINATE THE NEED FOR APPROPRIATEEXTERNAL, INDEPENDENT SAFETY DEVICES.PLEASE CONTACT ANAFAZE IMMEDIATELY IF THERE ARE ANY QUESTIONSABOUT SYSTEM SAFETYiii