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。
MITSUBISHI DC PERMANENT MAGNET DC SERVO MOTOR HD 81-12S
ALLEN BRADLEY SERVO DRIVE 8520-3S10A-BAT-EX4-Y-5-7 SER B
ABB DRIVE ACSB
AUTOMATION DIRECT PLC C0-00DD2-D
FANUC MDI/CRT UNIT A02B-0063-C001
ALLEN BRADLEY 1336 DRIVE 1336-B003-EAD-S1
ELAU SERVO DRIVE PMCK
SIEMENS SERVO MOTOR 1FT6064-1AF71-3AH1
PARKER SERVO MOTOR N0922JE-NMSN
FANUC DC SERVO MOTOR A06B-0616-B322#3000 (2/5)
SIEMENS SIMATIC S7 INPUT MODULE 6ES7138-4CA00-0AA0
FANUC AC SERVO MOTOR A06B-0505-B003
PARKER COMPAX 3 S038V4F11I12T11M12
SIEMENS SERVO MOTOR 1PHF03-0BB0
INDRAMAT DRIVE DDS02.1-W050-D
ALLEN BRADLEY DRIVE 1336VT-B050-EAS-L1 REPAIR SERVICE
MISUBISHI SERVO DRIVE FR-Z240-37K-EC REPAIR SERVICE
FANUC SERVOMOTOR A06B-0501-B521 REPAIR SERVICE
SIEMENS SITOP POWER SUPPLY 6EP1334-3BA00
FANUC VELOCITY CONTROL UNIT A06B-6050-H113
ALLEN BRADLEY DC OUTPUT MODULE 1771-OBD-C
SIEMENS SINUMERIK POWER SUPPLY 6EV 3055-0BC
SIEMENS SERVO MOTOR 1FK7022-5AK71-1GH3
PARKER SERVO DRIVE (COMPUMOTOR) APEX 20
SERVO MOTOR HD115B6-88T
SIEMENS SERVOMOTOR 1FK7042-5AK71-1DA3
SIEMENS SIMATIC S7 PLC MODULE 6ES7 321-1FH00-0AA0
SIEMENS MOTOR GG5116-OWY40-6HU3-Z
SIEMENS SERVO MOTOR 1FT6064-1AH71-3AG1
CONTROL BOARD Y01-0
LENZE/ AC TECHNOLOGY DRIVE Q15040B REPAIR SERVICE
FANUC A04B-0234-C409
FANUC SERVOMOTOR A06B-0502-B074 REPAIR SERVICE
MITSUBISHI AC SERVO MOTOR SA352B
PANASONIC POSITION DRIVER MSS021A1XP
ALLEN BARDLE 1771-ARC REMOTE I/O ADAPTER MODULE
MINISAFE 4600 MS46SRQ1-R-NC-FP