Product introduction

ADM-2740 is an isolated RS-232 to 2-Port RS-485 Hub. It can extend RS-232 transmission distance and RS-232 is divided into two RS-485 signals to improve driving ability. The design features of industrial application, DIN-rail installation, photoelectric isolation protection, DC24V power supply, are suitable for industrial environment. RS-232 device can easily access the industrial RS-485 network and do not need to do any hardware and software changes.

Product specification

Model:                                            ADM-2740
Functions:                                      RS-232 to 2-Port RS-485 Hub
Up Interface:                                  1-Port RS-232 (3 wire)
Down Interface:                              2-Port RS-485
Isolation voltage:                             Isolation voltage 1.5KV，600W Surge protection
RS-232 Trans distance:                  10 meters (Max)
RS-485 Trans distance:                  1000 meters (Max)
Data rate:                                        300 to 115200 Bps
Interface protection:                        15KV ESD Protection
RS-485 load capacity:                     32 nodes (Max)
Power supply:                                 9 to 48VDC, 100mA @12V，with power reverse connection protection
Operation mode:                             Half duplex, automatic flow direction
Working temperature:                    -20 ~ 75 ℃
Storage temperature:                     -20 ~ 85 ℃
Working humidity:                           0 ~ 90% RH
Shape size:                                    (L x W x H) 117x72x34mm
Interface definition

UP	Definition	DOWN	Definition
DB9(2)	RS-232(TXD)	T/R1+	1-Port RS-485+
DB9(3)	RS-232(RXD)	T/R1-	1-Port RS-485-
DB9(5)	RS-232(GND)	T/R2+	2-Port RS-485+
		T/R2-	2-Port RS-485-
		GND	NC
		VS-	POWER-
		VS+	POWER+

Dimension drawing (mm)