PLC的输进与输出较好分开走线,开关量与模拟量也要分开敷设。模拟量信号的传送应采用屏蔽线,屏蔽层应一端或两端接地,接地电阻应小于屏蔽层电阻的1/10。 ● 交流输出线和直流输出线不要用同一根电缆,输出线应尽量阔别高压线和动力线,避免并行。 (3)I/O真个接线 输进接线 ● 输进接线一般不要太长。但假如环境干扰较小,电压降不大时,输进接线可适当长些。 ● 输进/输出线不能用同一根电缆,输进/输出线要分开。 ● 尽可能采用常开触点形式连接到输进端,使编制的梯形图与继电器原理图一致,便于阅读。 输出连接 ● 输出端接线分为独立输出和公共输出。在不同组中,可采用不同类型和电压等级的输出电压。但在同一组中的输出只能用同一类型、同一电压等级的电源。MFR. PART NUMBER DESCRIPTION 1756-A10 10 SLOT CONTROLLOGIX CHASSIS 1756-A13 13 SLOT CONTROLLOGIC CHASSIS 1756-A17 CHASSIS 17 SLOT CONTROLLOGIX 1756-A4 4 SLOT CONTROLLOGIX CHASIS 1756-A7 7 SLOT CONTROLLOGIX CHASSIS 1756-BA1 LOGIX5000 BATTERY ASSEMBLY 1756-CFM 2 CHANNEL /2 OUT CONFIGURABLE FLOWMETER 1756-CNB CONTROLNET BRIDGE MODULE 1756-CNBR CONTROLNET REDUNDANT BRIDGE MODULE 1756-CP3 LOGIX5000 RS232 PROGRAMMER CABLE 1756-DHRIO 2 CHANNEL DH+ AND/OR RIO SCANNER 1756-DNB DEVICE NET BRIDGE/SCANNER MODULE 1756-DPALEN CONTROLLOGIC SYSTEM DOCUMENTATION SET PRINTED 1756-ENET ETHERNET/IP BRIDGE MODULE 1756-GTWY CONTROLLOGIC GATEWAY CONFIGURATION SOFTWARE 1756-GTWYR SUPT REINSTATEMENT CONTRACT FOR 1756GTWY 1756-GTWYS SUPT RENEWAL CONTRACT FOR 1756GTWY 1756-HSC 2 CHANNEL /4 OUTPUT HIGH SPEED COUNTER 1756-IA16 79-132 VAC INPUT 16PTS 1756-IA16I 79-132 VAC ISOLATED INPUT 16PTS 1756-IA8D VAC DIAGNOSTIC INPUT 8PTS 1756-IB16 VDC INPUT 16PTS 1756-IB16D VDC DIAGNOSTIC INPUT 1756-IB16I VDC ISLOTED INPUT 16PTS 1756-IB32 VDC INPUT 32PTS 1756-IC16 VDC INPUT 16PTS 1756-IF16 ANALOG INPUT-CURRENT/VOLTAGE 16PTS 1756-IF6I ISOLATED ANALOG INPUT-CURRENT/VOLTAGE 6PTS 1756-IF8 ANALOG INPUT-CURRENT/VOLTAGE 8PTS 1756-IH16I VDC ISOLOTED INPUT 16PTS