CYT-133SC Industrial Serial Ethernet RS232 RS485 Converter, 3 Digital In, 3 Relay Out

CYT-133SC Industrial Serial Ethernet RS232 RS485 Converter, 3 Digital In, 3 Relay Out
 CYT-133SC Industrial Serial Ethernet RS232 RS485 Converter, 3 Digital In, 3 Relay OutCYT-133SC Industrial Serial Ethernet RS232 RS485 Converter, 3 Digital In, 3 Relay Out 
Our Price:  £89.00(£106.80 Inc. VAT)
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Digital Inputs:  3
Digital Outputs:  3
RS232 Ports:  1
RS485 Ports:  1
RS422 Ports:  1



2 in stock, immediate despatch

The CYT-133SC is a device server with 3 digital inputs and 3 digital outputs and provides an industrial single port Ethernet RS232 or RS485 serial device server that can make your industrial serial devices to be IP / Ethernet network enabled. The digital inputs (3) and digital outputs (3) can be used to read or write relays, alarms, and lights. Supplied with Virtual Serial Port software to seemlesly add Serial ports to your LAN.

Special Offer:  Discounts of 7%, 10%, 12.5% and 15% are available when you order 10, 25, 50 and 100 items or more of this product.

  • 1 x RS-232 via 9-way D male;
    • Speed 1200-230.4kbps
    • Parity - None/Odd/Even
    • 7/8 data bits, 1/2 stop bits
  • Or 1 x RS232/RS-422/RS-485 via removable screw terminal;
    • RS232: Tx, Rx GND
    • RS422: RX+, RX-, TX+, TX-
    • RS485:  D+, D-
    • Speed 1200-230.4kbps
  • 3 x change-over Relays rated 30VDC @ 1A
  • 3 Digital Inputs - contact closure
  • Expandable to 30 inputs and 30 outputs using up to 9 BF-50 expanders over RS485
  • LED indication of LAN activity and digital IO status
  • 100mbps Ethernet speed, RJ45
  • Metal Housing suitable for industrial applications with mounting tabs
  • Virtual Serial port software
  • Operating Temperature 0-55°C
  • Dimensions 106 x 115 x 25 mm (W x D x H)
The CYT-133SC is a 1-port Serial to Ethernet converter with digital inputs and relay outputs that can network-enable your serial devices, such as weigh scales, PLCs, Data acquisition systems, point of sale, bar code scanners, access control systems, gas meters, printers - anything! Configured through software or built-in web-server.

Live Demo >>  (user name: admin, password: admin)

Connect it to your network via a standard RJ45 connector, set-up its' IP address and TCP port number and you are away. With the supplied Virtual Com port software you can simply communicate with your serial device as if it were connected to the back of your PC. Programmers can communicate directly with the CYT-133SC using standard TCP/IP protocols simply pointing to its IP address and TCP Port.

CYT-200 Serial IP Server

A pair of CYT-133SC's can be set up in Client-Server mode where they will send serial data between each other without any PC intervention.

ethernet to serial client server

Digital IO

The CYT-133SC has 3 digital contact-closure inputs and 3 change-over relays. The 3 digital input can be set to automatically send a TCP data packet on input state change or they can be interrogated to return input status. The Relay outputs can be set or reset by sending a TCP data packet. TCP packets need to consit of a ASCII control word as details in Appendix 1 of the user manual. Relays can also be activated by a AND or OR combination of the 3 digital inputs.

A pair of CYT1-133DC can be set up  in Client-Server mode where digital input state of one CYT-133SC can be transmitted to the relay outputs of the other CYT-133SC and vice-versa without any PC intervention.

Virtual Serial Port Utility

VCOM is a COM port redirection software application for Windows PC platforms. Its function is to re-direct customer application data destined for a local serial (COM) port on a PC. Rather than going out the local port, the data is transmitted across the Ethernet network using TCP/IP. The CYT-133SC attached to the network receives the data and presents it on its serial port. Conversely, data into the serial port of the CYT-133SC is sent back to the customer application via the network to the VCOM  software. The VCOM software then presents the data to the customer application as if it were from a local serial COM port.


One of the main objectives of the VCOM software is to eliminate the need for a customer to modify their application. If the application knows how to connect to a local serial port, it can by default talk to a remote serial port on a device server using the VCOM software. No understanding of how to develop networking software is required.


User Manual >>

Installation Guide >>

IPSearch and VSP Software guide >>

IPSearch Utility >>

Virtual Serial Port Utility >>