RMS Technologies ACC-03 RS485 TO RS232 CONVERTER CARD (ROHS) - Manual (Page 4)

1 Features
• RoHS compliant
• Input voltage of +7 to 40 VDC
• Connection to PC via serial COM port
• Easy 3-Pin connection to user’s RS485 device
• Small, compact device
2 Pinouts
The green screw terminal connector is for main power. The 3-pin header is for
RS485 communication.
Pin 1
Pin 1
Figure 1: Pin 1 location
Pin Function
1 Power (7-40VDC)
2 Ground
Table 1: Power pinouts
Pin Function
1 RS485 A (-)
2 Ground
3 RS485 B (+)
Table 2: RS485 pinouts
RS485-232 Converter Card Page 4 3/20/2009