这样-一个未经许可的人也可以访问该PLC.这些钥匙的替代品可以购买，其购买编号为44A736756-G01.这个产品包包含了三把CPU的钥匙，所有的350-374型CPU使用的都是同一型号的钥匙.当然，您可以不使用这个钥匙开关保护功能，将钥匙开关置于OFF的位置，并且不去改变钥匙开关的默认属性(失效)，这样，您就不需要使用一把钥匙去访问PLC.
DYNAQUIP DC3161 ONE-WAY SHUT-OFF INDUSTRIAL INTERCHANGE
DYNAQUIP DC3160 ONE-WAY SHUT-OFF INDUSTRIAL INTERCHANGE
WESTINGHOUSE F3050 CIRCUIT BREAKER 50A 600V 3 POLE NIB
O-Z GEDNEY 54116389 CORD CONNECTOR 1″ NPT, 0.312-0.375
FANUC EE-0989-314-001 CABLE ASSEMBLY, 20 PIN FEMALE 4 P
ALLEN BRADLEY 1746-OV32 SLC 500 DC SINK OUTPUT, NNB
CRANE 428 2″ NPT BRONZE RISING STEM GATE VALVE,
STOCKHAM G-676 CAST IRON 2″ FLANGED RISING STEM GATE VA
WARREN RUPP 031-045-000 PILOT VALVE ASSEMBLY KIT PLUNGE
MITSUBISHI ELECTRIC 24VDC COIL 40A/60A MAGNETIC CONTACT
ACTION PAK OCTAL ISOLATING THERMOCOUPLE CONDITIONER 435
CUSTOM MOTORS INC CMR23M-14H-012 POWER CABLE,
ALLEN-BRADLEY 1745-LP101 SER C PROGRAMMING UNIT
ALLEN-BRADLEY 1745-LP101 SER C PROGRAMMING UNIT
PHOENIX DOCKLITE DL-42-ARM 42″ MODULAR ARM, NIB
