Description
PLC在早期只是用来存储执行逻辑运算、顺序控制、定时、计数和运算等操作的指令;并通过数字输入和输出操作，来控制各类机械或生产过程。这种特性导致他一般用于较小的自控场所，且拓展性并不强。
SAFEMASTER BN5983 EMERGENCY STOP SAFETY RELAY
EMERGENCY STOP RELAY SAFEMASTER BN 5930.48 NEW
DOLD Safemaster BN5983.53 Safety Relay No DOAs
Dold Safemaster Relay BG5924
Siemens Simatic 6ES5947-3UR21 CPU Module
Siemens 6AV1242-0AB10 CPU Card
Cummins 6BT Injector pump recon.
Yokogawa ADMAG AXF050G Magnetic Flowmeter NEW
