监控设备：小的有数据可监视数据；大的还可能有图形监视器，可通过画面监视数据。除了不能改变PLC的用户程序，编程器能做的它都能做，是使用PLC很好的界面。性能好的PLC，这种外部设备已越来越丰富。
BALDOR SERVO DRIVE BSC1110
SIEMENS SERVO MOTOR 1FK7042-5AF71-1SA2
ALLEN BRADLEY DC DRIVE 1370AR-A0A71
ALLEN BRADLEY ADJUSTABLE FREQUENCY AC MOTOR DRIVE 1334-CJB SER B
KEB COMBIVERT DRIVE 07.F4.S1D-3420
EBMPAPST FAN A2S130-AB03-11
ALLEN BRADLEY GUARD MASTER 100-C60*00
CUTLER HAMMER OVERLOAD RELAY C3OOCN3 CA2
FANUC AC SERVO MOTOR A06B-0312-B351
FANUC SERVO MOTOR A06B-0513-B504#7008
FANUC AC SERVO MOTOR A06B-0147-B075#7076
SIEMENS SERVO MOTOR 1FT6062-1AH71-4EG1
SIEMENS SERVO MOTOR 1FK7100-5AF71-1AH0
SIEMENS SERVO MOTOR 1FK7100-5AF71-1EB5
INDRAMAT PROGRAMMING MODULE MOD13/1X
SIEMENS SERVO MOTOR 1FK7103-5AF71-1GB5
SIEMENS SERVO MOTOR 1FK7083-5AF71-1EB5
SEW-EURODRIVE SERVO MOTOR R27DT80N4BM605HRZ
ALLEN BRADELY PANELVIEW 2711P-RDT10C
MITSUBISHI SERVO DRIVE MR-SA33
INDRAMAT SERVOMOTOR MHD090B-035-PP1-UN
MODICON TELMECANIIQUE AC SERVO MOTOR BPH0752-N5AA2CA2
SCHNEIDER ELECTRIC SERVO MOTOR ILA1F571PC1A0
FANUC PLC MODULE A03B-0819-C104#D
FANUC TEACH PENDANT A05B-2308-C307
SIEMENS SERVO MOTOR 1FT6044-1AF71-4AH1
FANUC AC SERVO UNIT A06B-6089-H209
SIEMENS SERVO MOTOR 1FK7042-5AF71-1TA5
ALLEN BRADLEY DISPLAY MODULE 20-HIM-A4
FANUC AC SPINDLE MOTOR A06B-0754-B200#3000
MITSUBISHI INVERTER FR-A240E-3.7K
ALLEN BRADLEY POWERFLEX 70 DRIVE 20A D 022 A 3 AYNANNN SER.A
ABB BOARD DSQC324
INDRAMAT SERVO DRIVE RAC3.A00-W1-220
DANFOSS VLT AUTOMATION DRIVE 131B0424
FANUC INTERFACE MODULE A03B-0801-C401
FANUC SERVOMOTOR A06B-0502-B REPAIR SERVICE