Watlow Silver Series - Manual (Page 24)

16 EZware5000 Series Programming Manual
Chapter 3 – Connect the HMI to the PLC or Controller
The Silver Series family of HMIs 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 HMI-to-PLC/Controller communication cables for most PLC/Controllers
that are built to any length and tested for high reliability. The Silver Series family has three software controlled
communications ports (COM1, COM2, and COM3) located on two physical connectors, designated as Port A and Port
B (see Figures 1 and 2, below).
Figure 1: COM Ports – Rear View
Figure 2: COM Ports – Bottom 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.
 The HMI5043N/T only has one serial port (DE9P Male) with only COM1 and COM3 available. The HMI5056N
has two serial ports but only COM1 available.
1010-1007, Rev. 10