XR410 Expansion Relay Board with 4 10-Amp SPDT Relays 4 - Amp SPDT Relay(s) Expansion Interface Expansion Series $99.00 Full Description> XR41DPDT 4-Channel 1A DPDT Expansion Relay Board 4 - 1 Amp DPDT Relay(s) Expansion Interface Expansion Series $89.00 Full Description> XR420 4-Channel 20A SPDT Expansion Relay Board 4 - Amp SPDT Relay(s) Expansion Interface Expansion Series $139.00 Full Description> XR420HP Low Cost 4-Channel 20A SPDT Expansion Relay Board 4 - Amp SPDT Relay(s) Expansion Interface Expansion Series $114.00 Full Description> XR430 4-Channel 30A SPST Expansion Relay Board 4 - Amp SPST Relay(s) Expansion Interface Expansion Series $159.00 Full Description> XR43DPDT 4-Channel 3A DPDT Expansion Relay Board 4 - Amp DPDT Relay(s) Expansion Interface Expansion Series $99.00 Full Description> XR45 Expansion Relay Board with 4 5-Amp SPDT Relays 4 - Amp SPDT Relay(s) Expansion Interface Expansion Series $89.00 Full Description> XR45DPDT 4-Channel 5A DPDT Expansion Relay Board 4 - Amp DPDT Relay(s) Expansion Interface Expansion Series $109.00 Full Description> XRSSR4x Expansion 4-Channel Solid State Relay Controller 4 - Amp Solid-State Relay(s) Expansion Interface Expansion Series $89.00 Full Description> XRSSR4x_MIX Expansion 4-Channel Solid State Mixed SSR Relay Controller 4 - Amp Solid-State Relay(s) Expansion Interface Expansion Series $89.00 Full Description>