User`s manual

CyberResearch
®
Serial Communications COMHP 7404/-D25
CyberResearch, Inc. 9
25 Business Park Drive P: [phone]; F: [phone]
Branford, CT USA www.cyberresearch.com
Connector Pin Assignments
RS-232, RS-422/485 (DB-37 Male)
Port # 1 2 3 4
RS-422/485 RS-232
RX+ DCD 37 10 28 1
RX- RD 36 11 27 2
TX- TD 35 12 26 3
TX+ DTR 34 13 25 4
GND GND 33 14 24 5
RTS+ DSR 18 29 9 20
RTS- RTS 17 30 8 21
CTS- CTS 16 31 7 22
CTS+ RI 15 32 6 23
Technical Note: Board connector is a DB-37M. Mating connector is a DB-37S, ACON P/N: D-37SK-SFS-T or equivalent.