Chapter 3 - Con Nect The Oit To The Plc Or Controller - Maple Systems Silver Plus Series Installation And Operation Manual

Con nect the OIT to the PLC or Controller 25

Chapter 3 - Con nect the OIT to the PLC or Controller

The Silver Plus Series family of OITs can connect to one, two or more PLC/controllers. This is accomplished via
two 9-pin D-sub serial communications connectors (Port A and Port B) and one Ethernet port. Each PLC/Controller
has its own wiring requirements. Maple Systems offers OIT-to-PLC/Controller communication cables that connect
directly to software controlled COM1, which is available on either Port A or Port B for most PLC/Controllers that
are built to any length and tested for high reliability. The Silver Plus Series family has three software controlled
communications ports located on two physical connectors, designated as Port A and Port B (see Figures 1 & 2,
below).
Fig ure 1 - Com Ports - Rear View
Fig ure 2 - Com Ports - Bot tom View
The three software controlled ports are COM1, COM2, and COM3. Each software controlled communications port
can only be selected for one communication type. Once a communication type is selected for one of these software
controlled ports, that port cannot be used for another communication type. Each of these communication ports has
between one and three communication types. COM1 can be RS232, RS485 4-Wire, or RS485 2-Wire. COM2 is
strictly RS232. COM3 is either RS232 or RS485 2-Wire. COM1 cables are readily available for purchase from
Maple Systems. COM2 and COM3 cables are custom-made according to wiring diagrams that can be found on
Maple Systems' web site. Connecting multiple PLCs and controllers may require a splitter.
1010-1007, Rev 05