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CSE-H21 / Industrial 2-Port RS232 Ethernet Device Server

202.07 EUR
202.07 EUR
VAT included
Brand: Sollae Systems
SKU: 903688
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202.07 EUR
202.07 EUR

CSE-H21 – Industrial 2-Port RS232 Ethernet Device Server

CSE-H21 is a 2-port industrial serial-to-Ethernet device server that gives legacy RS232 equipment seamless TCP/IP connectivity. It enables remote monitoring and control over LAN/Internet without changing your existing system, while maintaining stable performance in noisy industrial environments thanks to electrically isolated RS232 ports and surge protection.

2× RS232 (DB9M)
Up to 230.4 kbps + RTS/CTS
10/100 Ethernet
Auto-sensing + Auto MDI/MDIX (RJ45)
Industrial Protection
Isolated serial ports + surge protection
Security
SSL/SSH + IP/MAC filtering
CSE-H21

Key features of the CSE-H21

  • • Durable steel case for industrial installations.
  • • Two electrically isolated RS232 ports for improved noise resistance.
  • • Wide operating temperature range (industrial environments).
  • • 4 communication modes: TCP Server, TCP Client, AT Command (Server/Client), and UDP.
  • • Security protocols: SSL/TLS and SSH, plus IP/MAC filtering and password protection.
  • • Separator (packet framing) + Windows Virtual COM driver (ezVSP) for legacy software.

CSE-H21 serial tunneling modes (TCP / UDP)

CSE-H21 bridges RS232 data to TCP/IP so you can extend serial communication distance and access devices over the network. Choose a mode based on your topology: passive listening (TCP Server), active outbound connection (TCP Client), flexible session control via AT commands, or UDP for connectionless block transfer.

  • • TCP Server: the device listens on a local port and accepts incoming TCP connections.
  • • TCP Client: the device actively connects to a predefined remote host/port.
  • • AT Command mode: server/client behavior controlled like a modem (flexible configuration).
  • • UDP mode: connectionless transfer; useful for multi-host scenarios.

Security & access restriction

For industrial deployments and remote access over the Internet, CSE-H21 offers encrypted tunnels and access restrictions. You can enable SSL/TLS or SSH for secure sessions, and restrict access using IP/MAC filtering and passwords.

  • • SSL/TLS for encrypted TCP communication (secure serial tunneling).
  • • SSH for secure console-style serial access where required.
  • • IP & MAC filtering + configuration password to limit who can connect/manage the device.

Configuration, monitoring & debugging

Configure network/serial parameters quickly using ezManager (Windows). For remote monitoring, you can check status via TELNET and use debugging features (including remote debug messages) to speed up troubleshooting in the field. Firmware can also be upgraded via the network.

  • • ezManager: configuration + monitoring tool (Windows).
  • • TELNET login + status commands for quick checks and remote operations.
  • • Remote debugging messages + “Send MAC address” option for multi-device identification.

Separator (packet framing) & Virtual COM port (ezVSP)

Many serial protocols are message-based, not continuous streams. The separator feature helps group serial bytes into complete packets before forwarding. For Windows applications that expect a local COM port, the ezVSP driver provides a Virtual COM port mapped over TCP/IP—often avoiding any software changes.

  • • Separator settings improve interoperability with framed serial data.
  • • ezVSP Virtual COM port for Windows (legacy software compatibility).
  • • Useful for remote console monitoring, PLC serial networking, meters and industrial instruments.
Two RS232 ports
Connect and network two serial devices in one cabinet—great for consolidating installations.
Electrical isolation
Isolated serial ports improve noise immunity and stability in industrial environments.
Fast Ethernet
10/100 Ethernet with auto-sensing and Auto MDI/MDIX for easy cabling.
4 communication modes
TCP Server, TCP Client, AT Command mode, and UDP cover common serial-over-IP topologies.
Security built in
SSL/SSH plus IP/MAC filtering and passwords help protect remote serial access.
Virtual COM + tools
ezVSP Virtual COM + ezManager/TELNET status features simplify integration and troubleshooting.

Serial Physical Interface

Serial Interface

2 X RS-232
RxD, TxD, RTS, CTS, GND

Electronically Isolated/±15KV ESD Protection

Connector

2 X DB9M Connector

Serial Port Property

Baudrate

300bps ~ 230,400bps

Data Bits

5, 6, 7, 8 bits

Properties

None, Even, Odd, Mark, Space

Stop Bit

1, 1.5, 2

Flow Control

RTS/CTS(Hardware)

Network Physical Interface

Network Interface

10Base-T/100Base-Tx Ethernet (RJ45)
Ethernet Speed Auto Sense
1:1 or Cross-over Cable Auto Sense
1000 VAC Isolation
Surge Protection

Software Functions

Protocols

TCP, UDP, IP ICMP, ARP, Ethernet, TELNET
TFTP, DHCP, PPPoE, DNS, DDNS

TELNET COM Port Control Option (RFC 2217)

Security

SSL(Secure Socket Layer)
SSH (Secure Shell)
IP & MAC filtering - Restrict host or network

Password for Configuring

Communication Mode

TCP Server (T2S)
TCP Client (COD)
TCP Server/Client with AT command (ATC)-Patent

UDP Mode (U2S)

Additional Functions

Remote Debug Function
Sending MAC address Option

Indicators (LEDs)

Power

Red

Status

Yellow, The Current Status

Ethernet Link

Green

Ethernet RxD

Yellow

Ethernet TxD

Green

COM Ports

TCP Connections, RxD, TxD, CTS, RTS

Management

ezManager

Configuration and Monitoring Tool through Ethernet

TELNET

TELNET Login

AT Command

Configuring in ATC Mode - Patent

Supplementary Software

ezManager

Configuration Tool for Windows

ezVSP

Serial to Network Virtual Driver for Windows

ezTerm

Simple TCP/IP Communication Test Tool

Dimension

Size

158mm X 90mm X 24mm

Operating Environment

Input Voltage

DC 5±0.5V

Power Consumption

200mA typical

Operating Temperature

-40℃ ~ +70℃

Storage Temperature

-40℃ ~ +85℃

Certificate

KC

Registration(KN 22, KN 24)

CE

EMC 2014/30/EU, RoHS 2011/65/EU

FCC

FCC Part 15 Subpart B, Class A

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