代PLC不仅有逻辑运算、计时、计数、顺序控制等功能，还具有数字和模拟量的输入输出、功率驱动、通信、人机对话、自检、记录显示等功能。既可控制一台生产机械、一条生产线，又可控制一个生产过程
目前，大多数PLC仍采用继电控制形式的“梯形图编程方式”。既继承了传统控制线路的清晰直观，又考虑到大多数工厂企业电气技术人员的读图习惯及编程水平，所以非常容易接受和掌握。梯形图语言的编程元件的符号和表达方式与继电器控制电路原理图相当接近。通过阅读PLC的用户手册或短期培训，电气技术人员和技术工很快就能学会用梯形图编制控制程序。同时还提供了功能图、语句表等编程语言
INTERNATIONAL POWER IHCC15-3 POWER SUPPLY NIB IHCC153
Siemens 3RG4070-3AF01
GENERAL ELECTRIC TFKMOMA1 MOTOR OPERATOR
FUJI PHL11B11-E10YV VIDEOGRAPHIC RECORDER PHL11B11E10YV
Siemens Simovert Masterdrives 6SE7021-0EA81
Siemens 3RV1021-4CA10
SIEMENS EPCOS B43456-S9508-M11 Capacitor
ALLEN BRADLEY 1606-XL240E POWER SUPPLY 1606XL240E
Siemens Simodrive 6SC2313-0AB05-Z K11 K12 M05 M54 / 6SC9411-0BA51
YASKAWA CIMR-J7AM40P4 DRIVE CIMRJ7AM40P4
Siemens 3VU1300-1MD00 MOTOR BREAKER .24-.4AMP
TIMKEN 6576 TAPERED ROLLER BEARING NIB
Siemens 3RU1116-1CB0
Siemens Simatic S7 6ES7 350-2AH00-0AE0
Siemens SIEMENS DRIVE BOARD
SIEMENS/MOORE 39EAMCBN APACS+ ENHANCED ANALOG MODULE
RELIANCE 85014-R RECTIFIER STACK 85014R
Siemens Simatic S5 6ES5 923-3UC11
CUTLER HAMMER H1009 HEATING ELEMENT LOT NIB
Siemens Drive board 6AW5 463-0AB
GENERAL ELECTRIC DS3800HSCA1C1E BOARD
MRC 310M BEARING NIB
SIEMENS SETZERMANN C867-01 KW24/01
THERMO MEASURETECH FMFN0PST0015N00S
Siemens Simatic S5 6ES5 928-3UB11
Siemens Simatic S5 6ES5 095-8MA01
Siemens Simatic 6ES5 777-0BB00
Siemens 6ES7 721-0AB00-0BA0 PG720PII
Siemens 3RV1901-1E
Siemens K2071 D35 A01
BELLOWS K 115V K
ELECTRO-CRAFT SERVO MOTOR-TACH
Siemens Simatic S5 6ES5 921-1AA21
Siemens A5E / 6SE7 Simovert Drive Board
SIEMENS 6GK1 500-0FC00
Siemens 3RB1026-1SB0 OVERLOAD 3-12AMP 600VAC
Siemens Simatic S7 6ES7 231-0HC22-0XA0
Siemens Micromaster 6SE9221-0CC40
Siemens Drive board C79451-Z1538-K5 PC BOARD BBG-6ISA/3PCI-01
HYDRO-LINE LR5AD-1.5X3 HYDRAULIC CYLINDER
CARRIER 19-C SEAL KIT NIB 19C35014