IBM 4800-741 Operation Guide - Page 27
RS-485, configuration
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Updated October 31, 2007 RS-485 and USB configuration: Figure 8 shows the RS-485 and USB configuration. 9B 4A 5A 7 CBA Figure 8. RS-485 and USB configuration 3A, 3B IBM cash drawer ports. Note: Port 3A automatically detects an IBM cash drawer. Customers with non-IBM cash drawers should read the voltage considerations described in "Cash drawers" on page 18. 4A IBM RS-485 primary display 5A IBM RS-485 primary POS keyboard 7 RS-485 printer Note: You cannot connect a RS-485 attached printer and a USB attached printer to a unit at the same time. Only one printer can be connected to the system at a time. 9A, 9B RS-485 scanner, or a secondary RS-485 display. C, B, A USB ports. C (left port) is 24 V, B and A are powered 12 V. Chapter 1. Introducing the SurePOS 700 Models 7
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