Maple Systems HMI5000P - Manual (Page 15)

15 HMI5000P Installation Guide
1010-1014 Rev 01 www.maplesystems.com
Figure 7: Serial Port Pin outs
Note: When using the COM1 [RS-232] RTS/CTS connections,
COM3 [RS-232] cannot be used at the same time.
Note: COM1 [RS-485 2W] and COM3 [RS-485 2W] support the
Siemens MPI 187.5K multi-point interface. However, only one COM
port can be used with the Siemens MPI interface at a time.