Solid State Relays with an RS232 Interface SSR1x 1-Channel Solid State RS-232 Relay Controller 1 - Optional Amp Solid-State Relay(s) Serial Interface Economy Series $44.00 Full Description> SSR1xRS 1-Channel Solid State Relay Controller with RS-232 Interface 1 - Optional Amp Solid-State Relay(s) Serial Interface Economy Series $54.00 Full Description> SSR2x RS-232 2-Channel Solid State Relay ControllerScrew Terminal Relay Connections 2 - Amp Solid-State Relay(s) Serial Interface Quick Start Kit Needed for DB9 Connection $59.00 Full Description> SSR2xRS 2-Channel Solid State Relay - RS-232 InterfaceRelay Screw Terminals & Onboard DB9 Connector 2 - Optional Amp Solid-State Relay(s) Serial Interface Onboard DB9 Connector $69.00 Full Description> UXPSSR4xPROXR 4-Channel Solid State Relay Controller + UXP Expansion Port 4 - Optional Amp Solid-State Relay(s) Serial Interface ProXR Series UXP Port Adds ApplicationsXR Port Adds Additional Relays $124.00 Full Description> ZADR420ProXR_WEB-i Web Relay 4-Channel 20 Amp SPDTProXR Firmware 8 AD/Contact Closure Inputs 4 - 30 Amp SPST Relay(s) Web Relay Interface Built-In Web Browser ProXR Series 8 A-D/Contact Closure InputsXR Port Adds Additional Relays $330.00 Full Description> ZADSSR16xProXR_ZRS Serial 16-Channel Solid State Relay Controller + 8-Channel 8/10-Bit A/D 16 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series 8 A-D/Contact Closure InputsXR Port Adds Additional Relays $353.00 Full Description> ZADSSR4xPROXR_ZRS RS232 Relay 4-Channel Solid StateProXR Firmware 8 AD/Contact Closure Inputs 4 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series 8 A-D/Contact Closure InputsXR Port Adds Additional Relays $169.00 Full Description> ZADSSR4xPROXR_ZRS_MIX RS232 Relay 4-Channel Mix Solid StateProXR Firmware 8 AD/Contact Closure Inputs 4 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series 8 A-D/Contact Closure InputsXR Port Adds Additional Relays $169.00 Full Description> ZADSSR8xPROXR_ZRS Serial 8-Channel Solid State Relay Controller + 8-Channel 8/10-Bit A/D 8 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series 8 A-D/Contact Closure InputsXR Port Adds Additional Relays $209.00 Full Description> ZADSSR8xPROXR_ZRS_MIX Serial 8-Channel Solid State Mixed SSR Relay Controller + 8-Channel 8/10-Bit A/D 8 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series 8 A-D/Contact Closure InputsXR Port Adds Additional Relays $209.00 Full Description> ZUXPSSR4xPROXR_ZRS Serial 4-Channel Solid State Relay Controller + UXP Expansion Port 4 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series UXP Port Adds ApplicationsXR Port Adds Additional Relays $169.00 Full Description> ZUXPSSR4xPROXR_ZRS_MIX Serial 4-Channel Solid State Mixed SSR Relay Controller + UXP Expansion Port 4 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series UXP Port Adds ApplicationsXR Port Adds Additional Relays $169.00 Full Description> ZUXPSSR8xPROXR_ZRS Serial 8-Channel Solid State Relay Controller + UXP Expansion Port 8 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series UXP Port Adds ApplicationsXR Port Adds Additional Relays $209.00 Full Description> ZUXPSSR8xPROXR_ZRS_MIX Serial 8-Channel Solid State Mixed SSR Relay Controller + UXP Expansion Port 8 - Amp Solid-State Relay(s) DB9 or Direct Wire Interface Screw Terminal Connections ProXR Series UXP Port Adds ApplicationsXR Port Adds Additional Relays $209.00 Full Description> Fiber Optic Interface Options USBFOI USB to Fiber Optic InterfaceMore >> $85.00 ZBFOI_1MW_INT 1 mW 802.15.4 Interface w/ Integrated Antenna for 802.15.4 Wireless to Fiber Optic Signal ConversionMore >> $85.00 ZBFOI_60MW_INT 60 mW 802.15.4 Interface w/ Integrated Antenna for 802.15.4 Wireless to FiberOptic Signal ConversionMore >> $104.00 ZBFOI_60MW_EXT 60 mW 802.15.4 Interface w/ External Antenna for 802.15.4 Wireless to Fiber Optic Signal ConversioMore >> $138.00 NEFOI Ethernet to Fiber Optic InterfaceMore >> $154.00 NWFOI WiFi 802.11b to Fiber Optic InterfaceMore >> $224.00 ZBFOI_1MW_EXT 1 mW 802.15.4 Interface with External Antenna for 802.15.4 Wireless to Fiber Optic Signal ConversionMore >> $119.00