描述
优先电路是指两个输入信号中先到信号取得优先权，后者无效。例如在抢答器程序设计中的抢答优先，又如防止控制的电机两个正、反转按钮同时按下的保护电路。图6-17所示为优先电路例。图中，X0先接通，M10线圈接通，则Y0线圈有输出；同时由于M10的动断触点断开，X1输入再接通时，亦无法使M11动作，Y1无输出。若X1先接通，情况相反。
REXROTH 0-608-830-244 NSFP 0608830244
REXROTH 1 818 509 210 VALVE 1 ST/PC 1818509210 NEW
Rexroth VT5006-17 Servo Controller Card #25923
Mannesmann Rexroth VT5007-17A Amplifier Card #26068
Rexroth VT5007-17A Amplifier Card #25863
Rexroth Hydrualic Valve
Item ID# 4WE10H73-32/CW230N9K4(R900503425)
INDRAMAT REXROTH DEA 4.2 I/O DIGITAL INTERFACE CARD QTY
REXROTH H160CA-32X22-MS2-V-PU-4-G-100 NSPP H160CA32X22M
REXROTH 3608872160-30 NSPP 360887216030
REXROTH IKG0311/005.0 USPP IKG03110050
Rexroth Hydraulic Proportional amplifier VT5012 VT 5012
