描述
根据控制系统的要求确定所需要的I/O点数时，应再增加10%～20%的备用量，以便随时增加控制功能。对于一个控制对象，由于采用的控制方法不同或编程水平不同，I/O点数也应有所不同。表2列出了典型传动设备及常用电气元件所需的开关量的I/O点数。
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Motorola Symbol WiFi Barcode Scanner MC9090-GJ0HBEGA2WR
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Symbol Motorola MC7090 Barcode HandheldScanner MC70 NEW
Brand New Original Box, 12 Month Warranty, WiFi 1D
SYMBOL MOTOROLA AP-7131N-66E40-US AP-7131N: 2-RADIO AP
MOTOROLA SYMBOL MC3090 BARCODE SCANNER WIFI PDA MC3090S
SYMBOL MOTOROLA LS3578-ERBR0100UR LS3578-ER, cradle, 7′
MOTOROLA SYMBOL MC9090 MC9090K MC9094 WWAN WLAN IMAGER
SYMBOL, MOTOROLA MC9090-GK0HBEGA2WW, CE5.0, IMAGER
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Symbol Motorola MC7095 2D Scan Qwerty Key
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MOTOROLA SYMBOL MC5574 MOBILE COMPUTER-GPS-BARCODE READ
CAMERA- BLUETOOTH- MC5574-PYCDURRA9WR
