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。
ACTUS POWER AC SERVO MOTOR NA20-75F
HAROWE ENCODER 11BRCX-300-J10B
EMERSON DATA ENTRY TERMINAL T-21
FANUC PULSECODER AT112
ALLEN BRADLEY DRIVE 1336-C020-EJE-S1
HITACHI BOARD BEJ
ALLEN BRADLEY DRIVE 1336S-BRF50-AA-FR6 SER F
FENNER ISOLATED OUTPUT 556298
MTS DRIVE MPA
ALLEN BRADLEY TTL INPUT MODULE 1771-IG
CONTROLLER CARD CMK-C2X
ALLEN BRADLEY SLC 500 PROCESSOR UNIT 1747-L30A SER A
SIEMENS SERVO MOTOR 1FT6105-8AF71-3AA0
SIEMENS SERVO MOTOR 1 PH6137-4NF49-Z
SIEMENS MOTION CONTROL SOFTWARE 6SW1700-8JD01-0AA0
EMERSON SERVO MOTOR DXM-340W
ELECTRONIC BALLAST FOR LVD INDUCTION LAMP 200W LVD-DQ-F120V/60HZ-200W
SIEMENS SERVO MOTOR 1FT6062-1AH71-4AH1
ALLEN BRADLEY PANELVIEW,2711E-T14C6X
ALLEN BRADLEY DRIVE 1336-B015-ECE-L3
YASKAWA DIODE CONVERTER NPS0-0803L
FANUC BOARD A16BA
ALLEN BRADLEY MULTI-CHANNEL HIGH SPEED COUNTER 1746-HSCE2 SER A
CUSTOM SERVO MOTOR INC. SERVO DRIVE CP-03-15S
INDRAMAT CONTROLLER MODULE PPC-R02.2N-N-NN-NN-NN-FW
ALLEN BRADLEY DRIVE 1336VT-B050-EOS-L1 REPAIR SERVICE
ALLEN BRADLEY DRIVE 1336VT-B050-EOS-L3 REPAIR SERVICE
FANUC CONTROLLER CARD A16B
EMERSON SERVO MOTOR DXM-340W
SIEMENS SERVO MOTOR 1FK7063-5AH71-1AA0
DEMAG CRANES & COMPONENTS AC MOTOR KBA 80 A 4/2
BARATRON TRANSDUCER 122AA-00100AB
SIEMENS SIMODRIVE 2 AXIS CONTROLLER CARD 6SN1118-0DH23-0AA1
YASKAWA ELECTRIC CARD JANCD-MBB02-1
AEG MODICON POWER SUPPLY P810 AS-P
DIRECT LOGIC CONTROLLER CARD F2-02DA-2
MODICON TELEMECANIQUE SERVOMOTOR BPH1904K5AF2CA