Visit one of our other
great web sites:
Visit Ozarks Audio Visual for the best in presentation equipment

AgriSwitch.com for agricultural relay options

8 Channel SPDT Relay

8 Channel SPDT Controller Board

SPDT Single Pole Double Throw Relay

SPDT Single Pole Double Throw Relays have three connections.  Common, Normally Open, and Normally Closed.  When the relay is off, the common is connected to the normally closed connection of the relay.  When the relay coil is energized, the Common swings over to the Normally Open Connection of the Relay.

Large Selection

We offer a large selection of Eight Channel SPDT Relay Boards for applications ranging from small signal switching to high voltage, high current applications.  If your looking for a 802.15.4 Wireless SPDT Relay, USB SPDT Relay or Bluetooth SPDT Relay we have the largest connection options around.

Latest Advancements

Look for our ProXR series controllers for the latest advancements in signal switching!  The ProXR Series is capable of controlling up to 256 relays.  Control one relay at a time or all 256 relays at once with manual and automatic refreshing command set!  With our SPDT signal switching, the ProXR Series are built from the ground up with Expansion in mind.  Simply Chain the XR Expansion Modules, one after another, to meet your computer controlled switching requirements.  Your system will grow as your needs grow by simply plugging in modules as needed.  All boards in the ProXR Series will have the ProXR suffix in the part number.    For more detailed information and to order, please click on the links below.
8-Channel SPDT Relay Controller Boards
LRR820_ZETH-ME
Ethernet Reactor Relay 8-Channel 20-Amp SPDT + 8-Channel 8-Bit A/D with ME Firmware
  • 8 - 20 Amp SPDT Relay(s)
  • Ethernet Interface
  • Reactor Series
R810PL_802154
ProXR Lite Relay 8-Channel 10-Amp SPDT with ZB ZigBee Interface
  • 8 - 10 Amp SPDT Relay(s)
  • 802.15.4 Interface
  • Range: 300 ft. to 1 mi.
  • ProXR-Lite Series
R810PL_USB
ProXR Lite USB Relay
8-Channel 10-Amp SPDT Relays Installed
  • 8 - 10 Amp SPDT Relay(s)
  • USB Interface
  • ProXR-Lite Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
R810PL_XSC
ProXR Lite Relay 8-Channel 10-Amp SPDT with XSC Interface
  • 8 - 10 Amp SPDT Relay(s)
  • XSC Interface
  • Range: 1 mi. to 15 mi.
  • ProXR-Lite Series
R810PL_ZBMESH
ProXR Lite Relay 8-Channel 10-Amp SPDT with ZB ZigBee Interface
  • 8 - 10 Amp SPDT Relay(s)
  • ZigBee Interface
  • Range: 300 ft. to 1 mi.
  • ProXR-Lite Series
R810PL_ZETH-ME
ProXR Lite Ethernet Relay
8-Channel 10-Amp Relays Installed
  • 8 - 10 Amp SPDT Relay(s)
  • 8 Variable Sensor Input(s)
  • Ethernet Interface
  • ProXR-Lite Series
R810PRO
8-Channel 10 Amp SPDT - RS-232 Interface
Pro Series with Screw Terminal Connections
  • 8 - 10 Amp SPDT Relay(s)
  • RS-232 Interface
  • Screw-On Connectors
  • Quick Start Kit Needed for DB9 Connection
  • PRO Series
R820
8-Channel 20-Amp SPDT Relay Board
Pro Series with Direct Relay Connections
  • 8 - 20 Amp SPDT Relay(s)
  • RS232 Interface
  • Direct Relay Connection
  • Quick Start Kit Needed for DB9 Connection
R820PL_802154
ProXR Lite Relay 8-Channel 20-Amp SPDT with ZB ZigBee Interface
  • 8 - 20 Amp SPDT Relay(s)
  • 802.15.4 Interface
  • Range: 300 ft. to 1 mi.
  • ProXR-Lite Series
R820PL_USB
ProXR Lite USB Relay
8-Channel 20-Amp SPDT Relays Installed
  • 8 - 20 Amp SPDT Relay(s)
  • USB Interface
  • ProXR-Lite Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
R820PL_XSC
ProXR Lite Relay 8-Channel 20-Amp SPDT with XSC Interface
  • 8 - 20 Amp SPDT Relay(s)
  • XSC Interface
  • Range: 1 mi. to 15 mi.
  • ProXR-Lite Series
R820PL_ZBMESH
ProXR Lite Relay 8-Channel 20-Amp SPDT with ZB ZigBee Interface
  • 8 - 20 Amp SPDT Relay(s)
  • ZigBee Interface
  • Range: 300 ft. to 1 mi.
  • ProXR-Lite Series
R820PL_ZETH-ME
ProXR Lite Ethernet Relay
8-Channel 20-Amp Relays Installed
  • 8 - 20 Amp SPDT Relay(s)
  • 8 Variable Sensor Input(s)
  • Ethernet Interface
  • ProXR-Lite Series
R85PL_802154
ProXR Lite Relay 8-Channel 5-Amp SPDT with ZB ZigBee Interface
  • 8 - 5 Amp SPDT Relay(s)
  • 802.15.4 Interface
  • Range: 300 ft. to 1 mi.
  • ProXR-Lite Series
R85PL_USB
ProXR Lite USB Relay
8-Channel 5-Amp SPDT Relays Installed
  • 8 - 5 Amp SPDT Relay(s)
  • USB Interface
  • ProXR-Lite Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
R85PL_XSC
ProXR Lite Relay 8-Channel 5-Amp SPDT with XSC Interface
  • 8 - 5 Amp SPDT Relay(s)
  • XSC Interface
  • Range: 1 mi. to 15 mi.
  • ProXR-Lite Series
R85PL_ZBMESH
ProXR Lite Relay 8-Channel 5-Amp SPDT with ZB ZigBee Interface
  • 8 - 5 Amp SPDT Relay(s)
  • ZigBee Interface
  • Range: 300 ft. to 1 mi.
  • ProXR-Lite Series
R85PL_ZETH-ME
ProXR Lite Ethernet Relay
8-Channel 5-Amp Relays Installed
  • 8 - 5 Amp SPDT Relay(s)
  • 8 Variable Sensor Input(s)
  • Ethernet Interface
  • ProXR-Lite Series
R85PRO
8-Channel 5 Amp SPDT - RS-232 Interface
Pro Series with Screw Terminal Connections
  • 8 - 5 Amp SPDT Relay(s)
  • Serial Interface
  • Screw-On Connectors
  • Quick Start Kit Needed for DB9 Connection
  • PRO Series
ZADR810PROXR
Zigbee Relay Board 8-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 10 Amp SPDT Relay(s)
  • 802.15.4 Interface
  • Range: 300 ft. to 1 mi.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR810ProXR_WEB-i
Web-i Relay Controller 8-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 10 Amp SPDT Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR810PROXR_XSC
XSC Long Range Wireless Controller 8-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 10 Amp SPDT Relay(s)
  • XSC Interface
  • Range: 1 mi. to 15 mi.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR810PROXR_ZBMESH
ZB ZigBee Relay Controller 8-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 10 Amp SPDT Relay(s)
  • ZigBee Interface
  • Range: 300 ft. to 1 mi.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR810PROXR_ZBT
8-Channel 10 Amp Bluetooth Relay
with Bluetooth Interface & Variable Sensor Input
  • 8 - 10 Amp SPDT Relay(s)
  • Bluetooth Interface
  • Range: 300 ft.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR810PROXR_ZRS
8-Channel 10 Amp SPDT - RS-232 Interface
ProXR Firmware with 8 AD/Contact Closure Inputs
  • 8 - 10 Amp SPDT Relay(s)
  • DB9 or Direct Wire Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR81DPDTProXR_WEB-i
Web Relay Controller 8-Channel 1 Amp DPDT + 8-Channel 8/10-Bit A/D
  • 8 - 1 Amp DPDT Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR820ProXR_WEB-i
Web Relay Controller 8-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 20 Amp SPDT Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR820ProXR_ZBT
Bluetooth Relay Controller 8-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 20 Amp SPDT Relay(s)
  • Bluetooth Interface
  • Range: 300 ft.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR830ProXR_WEB-i
Web Relay Controller 8-Channel 30 Amp SPST + UXP Expansion Port
  • 8 - 30 Amp SPST Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR83DPDTProXR_WEB-i
Web Relay Controller 8-Channel 3 Amp DPDT + 8-Channel 8/10-Bit A/D
  • 8 - 3 Amp DPDT Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR85DPDTProXR_WEB-i
Web Relay Controller 8-Channel 5 Amp DPDT + UXP Expansion Port
  • 8 - 5 Amp DPDT Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR85PROXR
Zigbee Relay Board 8-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 5 Amp SPDT Relay(s)
  • 802.15.4 Interface
  • Range: 300 ft. to 1 mi.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR85ProXR_WEB-i
Web-i Relay Controller 8-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 5 Amp SPDT Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR85PROXR_XSC
XSC Long Range Wireless Controller 8-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 5 Amp SPDT Relay(s)
  • XSC Interface
  • Range: 1 mi. to 15 mi.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR85PROXR_ZBMESH
ZB ZigBee Relay Controller 8-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 5 Amp SPDT Relay(s)
  • ZigBee Interface
  • Range: 300 ft. to 1 mi.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR85PROXR_ZBT
8-Channel 5 Amp Bluetooth Relay
with Bluetooth Interface & Variable Sensor Input
  • 8 - 5 Amp SPDT Relay(s)
  • Bluetooth Interface
  • Range: 300 ft.
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR85PROXR_ZRS
8-Channel 5 Amp SPDT - RS-232 Interface
ProXR Firmware with 8 AD/Contact Closure Inputs
  • 8 - 5 Amp SPDT Relay(s)
  • DB9 or Direct Wire Interface
  • Screw Terminal Connections
  • ProXR Series
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZUXPR810ProXR_WEB-i
Web Relay Controller 8-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 10 Amp SPDT Relay(s)
  • Web Browser Interface
  • Built-In Web Browser
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR810ProXR_ZBT
Bluetooth Relay Controller 8-Channel 10 Amp SPDT + UXP Expansion Port
  • 8 - 10 Amp SPDT Relay(s)
  • Bluetooth Interface
  • Range: 300 ft.
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR810ProXR_ZRS
8-Channel 10 Amp SPDT - RS-232 Interface
ProXR Firmware with UXP Port
  • 8 - 10 Amp SPDT Relay(s)
  • DB9 or Direct Wire Interface
  • Screw Terminal Connections
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR820ProXR_WEB-i
Web Relay Controller 8-Channel 20 Amp SPST + UXP Expansion Port
  • 8 - 20 Amp SPDT Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR820ProXR_ZBT
Bluetooth Relay Controller 8-Channel 20 Amp SPDT + UXP Expansion Port
  • 8 - 20 Amp SPDT Relay(s)
  • Bluetooth Interface
  • Range: 300 ft.
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR820ProXR_ZRS
8-Channel 20 Amp SPDT - RS-232 Interface
ProXR Firmware with UXP Port
  • 8 - 20 Amp SPDT Relay(s)
  • DB9 or Direct Wire Interface
  • Direct Relay Connection
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR830ProXR_WEB-i
Web Relay Controller 8-Channel 30 Amp SPDT + 8-Channel 8/10-Bit A/D
  • 8 - 30 Amp SPST Relay(s)
  • Web Browser Interface
  • Screw Terminal Connections
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR85ProXR_WEB-i
Web Relay Controller 8-Channel 5 Amp SPDT + UXP Expansion Port
  • 8 - 5 Amp SPDT Relay(s)
  • Web Browser Interface
  • Built-In Web Browser
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR85ProXR_ZBT
Bluetooth Relay Controller 8-Channel 5 Amp SPDT + UXP Expansion Port
  • 8 - Amp SPDT Relay(s)
  • Bluetooth Interface
  • Range: 300 ft.
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR85ProXR_ZRS
8-Channel 5 Amp SPDT - RS-232 Interface
ProXR Firmware with UXP Port
  • 8 - 5 Amp SPDT Relay(s)
  • DB9 or Direct Wire Interface
  • Screw Terminal Connections
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays