Instruction/ maintenance manual of the product RS-232 IBM
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Copyright © 1 996, 1 99 7 , 1 998, 1 999, 2000, National Contr ol Devices 8SC RS-2 3 2 Input Scanner Users Guide Re vision 1 .0 B y R y a n S h e l d o n.
Disclaimer: NCD will not be responsible for any personal injury or damage to computers or other electronic devices caused in conjunction with the use of NCD products. The user assumes full responsibility of any and all damage that may result in combination with NCD products, services, and literature.
Helpful hint. Could cause problems later under normal operation. Fatal mistake. The X tells about common assem- bly and operation errors as well as other things to watch out for . The check is a guide to help the user with assembly and operation. Use them to prevent mistakes.
Input 1 Input 2 Input 3 Input 4 Input 5 Input 6 Input 7 Input 8 Ground When resistor network RN2 is installed, all inputs are pulled high (on) and can be turned off by connecting a wire to the ground line. J1-J4 - Address Select. These jumpers de- fine the device number of the 8SC, allow- ing 16 devices to coexist on a single serial line.
J6 Inputs D0-D7 are pulled up via RN2 4.7K resistor network. Data Inputs RS-232 Ground RS-232 Input Open Collector RS-232 Output J4 J3 J2 J1 +5 J5 CR 1 2 3 CR1 RN1 RN1 +5 V+ + 5 78L05 V+ C1 C1 D0 D1 D.
The NCD-1 10C Interface Processor and How It W orks: The NCD-110C is a PIC-based computer that has been programmed to listen to incoming data on the serial port and to respond ONL Y if its name is called. T o understand how it works, we will examine the processes of the 1 10C as they were written into the chip.
W e welcome suggestions and r ecommendations. Please tell us about an y err ors or omissions you may find in this manual. All recommen- dations become the pr operty of NCD Inc. The 8SC Input Scanner is pr operty of National Contr ol Devices. Copyright © 1 996, 1 99 7 , 1 998, 1 999, 2000, All Rights Reser v ed.
An important point after buying a device IBM RS-232 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought IBM RS-232 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data IBM RS-232 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, IBM RS-232 you will learn all the available features of the product, as well as information on its operation. The information that you get IBM RS-232 will certainly help you make a decision on the purchase.
If you already are a holder of IBM RS-232, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime IBM RS-232.
However, one of the most important roles played by the user manual is to help in solving problems with IBM RS-232. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device IBM RS-232 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
