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。
DART CONTROLS MODULE 125DV-C
ALLEN BRADLEY DRIVE 1336-C040-EJG-RP3 REPAIR SERVICE
ALLEN-BRADLEY OUTPUT MODULE 1771-OBD SER.B
CONTROL TECHNIQUES SERVOMOTOR 095E2B201BARAA100190
EBMPAPST TUBEAXIAL FAN W2E200-HH82-01
SIEMENS SERVO MOTOR 1FK7100-5AF71-1EG3
ALLEN BRADLEY DRIVE 1336F-BRF200-AN-EN SER.A
FANUC SERVO MOTOR A06B-0501-B
SIEMENS CONTROLLER CARD 6SN1118-1NJ01-0AA0
FANUC SERVOMOTOR A06B-0652-B011
ARNOLD MULLER SERVO MOTOR DVSAD00
ALLEN BRADELY DISCONNECT SWITCH RIGHT HAND 1494V-DS30-D
FESTO CONTROLLER 1FB16-03
ABB MAGNET SERVO MOTOR T6C4BR1209
INDRAMAT ECODRIVE DKCFW
LEROY SOMER MENTOR II DIGITAL DC DRIVE DMVA
SQUARE D TRANSFORMER,9070TF150D1
YASKAWA SERVO PACK CPCR-01-SD1A
INDRAMAT SERVO MOTOR MHD093B-058-NG0-BN
SIEMENS SERVO MOTOR 1FK7080-5AH71-1GA0
SIEMENS DC MOTOR 1GG5134-0WY49-6HU7-Z
CONTROL TECHNIQUES COMMANDER CD DRIVE CD 220K
INDRAMAT MEMORY CARD FWC-HSM1.1-ELS-05V18-MS
SIEMENS INPUT CARD 6ESGD00-0ABO
ALLEN BRADLEY POWERFLEX 70 20AD3P4A3AYNNNCO2
ALLEN BRADLEY DRIVE 1336VT-B020-EOP-FA
ABB DRIVE ACSP2
SIEMENS CONTROLLER CARD 6SC6100-0NA11
FANUC TEACH PENDANT A05B-2518-C200#EMH
OMRON SAFETY LIGHT CURTAIN AS IT IS F3SN-A0757P25-L
SIEMENS SERVO MOTOR 1FK7080-5AH71-1TH5
YASKAWA ELECTRIC POWER SUPPLY UNIT CPS-10FB
FANUC SERVOMOTOR A06B-0371-B175
ALLEN BRADLEY AC SERVO MOTOR F-4030-Q-H00AA
SIEMENS CIRCUIT BOARD 65C170-0FC50
INDRAMAT INTERFACE BOARD DCF01.1
SIEMENS SERVOMOTOR 1FK6063-6AF71-1AA2