描述
输入接线一般不要太长。但如果环境干扰较小，电压降不大时，输入接线可适当长些；输入／输出线不能用同一根电缆，输入／输出线要分开；尽可能采用常开触点形式连接到输入端，使编制的梯形图与继电器原理图一致，
ABB 10D1475SN04PF29KC51C1112C1 Digital Flow Meter 1/4″
Adept 30400-20000 Signal Interface Box for Robot
Allen Bradley 1771-IK Encoder/Counter Module 1771IK New
Reliance Electric 0-51849-1 Gate Driver Control 0518491
Omron C200HW-SLK23 Symac Link Unit C200HWSLK23
HBM MC-01 B5001-120/07 Amplifier Card MC01 New
GE TJJ436225 Circuit Breaker 225 AMP 3P 600 Volt New
LiftMaster LA400 24VDC Linear Gate Opener Lift Master
Rosemount Analytical 1054A Analyzer New
