Copyright Goodheart-Willcox Co., Inc. Chapter 6 PLC Programming 97 Goodheart-Willcox Publisher Figure 6-15. Select the 1747-IA16 input module with sixteen 120 VAC input ports. Goodheart-Willcox Publisher Figure 6-16. Select the 1746-OA16 output module with sixteen 120 VAC output ports. Figure 6-17 displays the input/output connections of the Allen-Bradley modular SLC 5/03 PLC device described in the previous paragraph. Table 6-2 illustrates the assignments of the I/O ports. Figure 6-18 shows the PLC ladder diagram for the relay logic diagram displayed in Figure 6-13. Goodheart-Willcox Publisher Table 6-2. Input/output address assignments for Figure 6-13. Input Ports Output Ports Stop pushbutton = I:1/0 Motor = O:2/0 Start pushbutton = I:1/1 Green light = O:2/1