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Manufacturer of computer controlled relay, I/O and custom boards for commercial and industrial applications.

S8-RLY-ISO-EXT-BELR

8 Channel RS232 Reed Relay Board W/ISO Input Port and DC Power Terminal Block

 
$144.15
If daisy chaining additional boards to a unit connected to the PC - only one modular cable is required per each additional unit. Modular cables available seperately.
Enclosure image is an example for illustrative purposes only and may not be the exact part number of the product.
S8-RLY-ISO-EXT-BELR
Typically a 2-3 Day Production <10pcs
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Our quantity discounts:
Quantity 5+ 25+
Price $136.94 $129.74
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Features

8 channel RS-232 reed relay board controlled through one of the PC RS232 serial ports, with SPST (Form A) reed relays for fast switching and high reliability, No minimum voltage or current for contact load, 200VDC/200VAC resistive 0.5A   Note reed relays are typically not designed for controlling inductive loads.

Includes 8 channel opto-isolated input port on the board that can handle voltages up to 28VDC (or more with external components).

Designed for single board operation or multiple board operation on the same serial port. Up to 16 boards can be connected in a daisy chain configuration, with up to a total of 128 - 10 Amp relays under computer control.

With DC Terminal Block power input - typically used when a regulated DC power supply with sufficient capability is already available where the unit will mount, or to daisy chain units on one power supply.  Requires a regulated voltage between 9-12VDC @ 1Amp per board.  Includes reverse voltage protection to prevent damage to the board if the power leads were installed backwards.

  • ASCII commands to control relays.
  • Easy hook up using standard modular telephone cable.
  • Any software language that can write to the PC serial port can be used with this relay board NO special drivers needed.
  • 4800-38400 baud (default 9600 baud)
  • LED Indicators for relays included

Eight Channel Relay Instruction Manual (8_ch_relay_manual.pdf, 213 Kb) [Download]

8 Ch Relay Board Dimensional Drawing (8_Ch_Dimensional_Drawing.pdf, 85 Kb) [Download]

Application Note 115 - Compatibility information (app_note_115.pdf, 91 Kb) [Download]

Application Note 156 - Detailed board command information (app_note_156.pdf, 127 Kb) [Download]

Compatible Accessories & Components


Modular cable if daisy chaining additional units between the boards.

The information below describes the power options, (this is the voltage that powers the board itself - not the voltage/current the relays can handle).

Choose the option that best suits your application.  Some options are available only on specific boards, and it depends on the type of control and the relay options for that board.

AC Wall Adapter - wall power supply that converts the AC voltage to DC to power the unit, the cable plugs into the unit with a DC power connector.

DC Terminal Block - Typically used when a regulated DC power supply with sufficient capability is already available where the unit will mount, or to power a daisy chained string of boards.  Includes reverse voltage protection to prevent damage to the board if the power leads were installed backwards.  Most of our boards will operate on 9-12VDC.

120V 50/60Hz - This has an on-board power supply that will operate directly off the 120VAC line voltage.  The line voltage connects to a three position terminal block on the board that is marked with L1 (Line 1 -typically black), N/L2 (Neutral wire - typically white) and GND (Electrical ground - typically green or bare).  Common practice is to add an inline fuse for safety.

240V 50/60Hz - This has an on-board power supply that will operate directly off the 240VAC line voltage.  The line voltage connects to a three position terminal block on the board that is marked with L1 (Line 1 -typically black), N/L2 (L2 - typically red, but could be another color) and GND (Electrical ground - typically green or bare).  Common practice is to add an inline fuse for safety.

Bus Power Option - This power option is only for USB boards with the Reed relays installed and specific I/O boards.  The board is powered by the USB port and must be a high power port or USB port from a powered hub with a 500mA output. 

Note: USB devices are also required to automatically enter ultra low-power suspend mode when the USB host is suspended, and this may turn off the power to the board and all relays will turn off that were active.  Nevertheless, many USB host interfaces do not cut off the power supply to USB devices when they are suspended, it depends on the host controller.  If this is a problem for your application use the USB boards that are powered by an AC adapter or DC terminal block power versions - these will not turn off the relays once set by a command (unless the power is disconnected from the board).