Eaton HMi Series User Manual

HMi Series Instruction Leaflet
Serial Port Pinout
For 4” (HMI04BU/HMI04CU)
COM1 and COM3 are RS-232 only COM2
DB 9 Pinout for COM1 and COM3 RS-232
COM3 Not Used COM3 Used
PIN
COM1 COM3 COM1 COM3
1
2 RX RX
3 TX TX
4
5 GND GND GND
6
7 RTS TX
8 CTS RX
9
Not Used
Note: Blank=No connection.
COM2 Pinout for
RS-422 & RS-485
PIN RS-422 RS-485
G GND GND
T+ TX+ TX+
T- TX- TX-
R+ RX+ RX+
R- RX- RX-
Note: Blank=No connection.
Note: For RS-485 Connect TX+ to RX+ and
TX- to RX-.
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Eaton HMi Series Specifications

General

Brand	Eaton
Model	HMi Series
Category	Touchscreen
Language	English