Making the Hardware Connections

Serial Port(s)

ESR901: One serial port with two connector options: one (DB-9M) or one five-terminal removable terminal block (DIP switch selectable)

ESR902: Two serial port connectors (DB-9M)

ESR904: Four serial port connectors (DB-9M)

Note:

Refer to Appendices A, B and C for connection pin-outs.

Power Connector

The power connector is a removable terminal block with four terminals. From top to bottom the terminals are:

Terminal

Connect to

Description

 

Negative side of DC

 

 

power supply (if DC

 

GND

power used)

Internally, the chassis ground of the Serial

Also connect negative

Server is connected to this terminal.

 

 

side of Backup DC

 

 

power supply (if used)

 

 

One side of AC power

 

AC In

supply (if AC power

 

 

used)

 

 

The other side of AC

Either AC or DC power can be used to

 

power supply (if AC

power ESR Serial Servers. Power supply can

AC/DC +

power used)

voltages range from 9 V to 48 VDC or 8 V

OR

to 24 VAC.

In

Positive side of DC

 

 

 

 

power supply (if DC

 

 

power used)

 

Backup

Positive side of

Backup power must be DC voltage and can

Backup DC power

DC+ In

be any voltage between 9 VDC and 48 VDC.

supply

 

 

Serial Server/Port Operational Modes

Using the ESP Manager, Web Server or Telnet the Serial Server can be put into Console Mode, Default Mode or Upgrade Mode. The serial ports can be configured for RS-232, RS-422, RS-485H (half duplex) or RS-485F (full duplex) operation. The server also can be put into Console Mode by placing the Run/Console switch in the Console position.

Manual Documentation Number: ESR90x-0508m

Chapter 2

11

B&B Electronics Mfg Co Inc – 707 Dayton Rd - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104www.bb-elec.com

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445www.bb-europe.com

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B&B Electronics ESR904, ESR901, ESR902 manual Serial Server/Port Operational Modes, Terminal Connect to Description

ESR902, ESR901, ESR904 specifications

B&B Electronics, a renowned name in industrial networking, has developed a series of robust and reliable products, including the ESR904, ESR901, and ESR902. These devices are integral components designed primarily for serial-to-Ethernet conversion, enhancing data communication across various applications.

The ESR904 is a versatile serial server that supports four serial ports. It effectively enables communication between serial devices and Ethernet networks, facilitating the integration of legacy devices into modern IT environments. With a built-in web server, the ESR904 allows users to manage configuration settings conveniently from a web browser. It supports various networking protocols, including TCP/IP, UDP, and HTTP, ensuring seamless connectivity. Additionally, the device features baud rate settings that can be configured per port, accommodating a wide range of serial devices.

The ESR901 is specifically tailored for single-port serial applications. It provides a straightforward solution for converting RS-232/422/485 serial connections to Ethernet. This simplicity does not compromise functionality, as the ESR901 supports a variety of protocols, including telnet for remote access, making it suitable for diverse networking environments. Its compact design and ease of installation make it an ideal choice for those looking to integrate serial devices without extensive modifications to existing setups.

The ESR902 offers dual-port functionality, allowing it to connect two serial devices to an Ethernet network simultaneously. This dual capability is particularly beneficial for applications that require multiple devices to communicate over a single network connection. Like its counterparts, the ESR902 supports various communication protocols and provides secure data transmission. Moreover, it features diagnostic tools that assist networking professionals in troubleshooting any connectivity issues that may arise.

All three models incorporate features such as flexible mounting options, power over Ethernet (PoE) support, and ruggedized designs to withstand industrial environments. They are designed to operate reliably in harsh conditions, featuring wide temperature ranges and robust housings. B&B Electronics emphasizes security with options for SSH/SSL encryption, ensuring that sensitive data remains protected during transmission.

In summary, the ESR904, ESR901, and ESR902 by B&B Electronics represent valuable solutions for integrating legacy serial devices into Ethernet networks. With their robust feature sets, flexible configurations, and reliable performance, they cater to a diverse range of industries, enhancing connectivity and improving overall operational efficiency.