Relays / FETs

Solid-State and Electromechanical Relay Products

ACCES I/O OFFERS A VARIETY OF RELAYS FOR DIFFERENT APPLICATIONS

Relay is the name for a switch that is operated electro-mechanically or electronically. Their main task is to make and break connections to control the flow of current in electrical circuits. They’re used for various purposes ranging from validating semiconductors to interfacing low power computers or microcontrollers with high power machinery.

There are two main types of relays. Electromechanical Relays use an inductor to mechanically operate the arm of the switch while Solid State Relays (SSR) have no moving parts but instead use the electrical and optical properties of semiconductors to perform their switching functions. 

At ACCES I/O we use Field Effect Transistor (FET) switches for non-mechanical solutions as they have faster switching speeds and smaller form factors than traditional SSRs.

In order to choose the right relay for your application it is useful to first take note of the key differences between main types of relays.

In Electromechanical Relays (commonly just relays) the connection is controlled by an arm that opens and closes as a response to the magnetic field induced in the coil on the other side. The mechanical robustness of this connection allows it to operate in harsh conditions and to support a wide range of signals, but that’s also what makes this connection slower (5-15ms) and bulkier. Another important occurrence in Electromechanical Relays resulting from its construction is so called contact bounce that causes a noise after switching the relay position to closed but it can be efficiently cushioned by using a debouncing filter.

FETs (often called high side or low side switches) due to their non-mechanical nature offer zero contact bounce and are much faster (0.5-1ms) and smaller. The common problem with them is that they require a minimum load to work and they can switch only DC signals. They’re recommended whenever faster and more frequent switching is required and are a perfect solution for low noise applications like precise measurements.

For more information about different variants of FETs and Electromechanical Relays and guidance on how to choose the right relay for your application, click here.

PCI Express

ModelDigital I/OOPTOsRelayCTRSCOSXThf:att:pa_addr-cfghf:att:pa_autocalhf:att:pa_baudhf:att:pa_bip-rghf:att:pa_bip-rg-inputhf:att:pa_buffhf:att:pa_bus-connhf:att:pa_cable-typehf:att:pa_connectorhf:att:pa_coshf:att:pa_counter-resolutionhf:att:pa_counter-typehf:att:pa_countershf:att:pa_digital-i-ohf:att:pa_fifohf:att:pa_four20mahf:att:pa_inputshf:att:pa_isolationhf:att:pa_kithf:att:pa_lrg-fifohf:att:pa_on-board-calhf:att:pa_optoshf:att:pa_outputshf:att:pa_pcie-laneshf:att:pa_pcie-x1-expansionhf:att:pa_proghf:att:pa_prot-cfghf:att:pa_quad-inputshf:att:pa_receiver-typehf:att:pa_relayhf:att:pa_reshf:att:pa_res-inputhf:att:pa_rs-232hf:att:pa_rs-422hf:att:pa_rs-485hf:att:pa_speedhf:att:pa_uni-rghf:att:pa_uni-rg-inputhf:att:pa_xt
PCIe-IDIO-2424 In & 24 OutYes24 SSYesLearn More57162924-in-24-outyes24-ssyes
PCIe-IDIO-1212 In & 12 OutYes12 SSYesLearn More57162912-in-12-outyes12-ssyes
PCIe-IDI-2424 InYesYesLearn More57162924-inyes570yes
PCIe-IDO-2424 OutYes24 SSYesLearn More57162924-outyes24-ssyes
PCIe-IIRO-1616 In & 16 OutYes16 EMYesYesLearn Moreyes62916-in-16-outyes16yes
PCIe-IIRO-88 In & 8 OutYes8 EMYesYesLearn Moreyes6298-in-8-outyes8yes

USB

ModelDigital I/OOPTOsRelayCTRSCOSXThf:att:pa_addr-cfghf:att:pa_autocalhf:att:pa_baudhf:att:pa_bip-rghf:att:pa_bip-rg-inputhf:att:pa_buffhf:att:pa_bus-connhf:att:pa_cable-typehf:att:pa_connectorhf:att:pa_coshf:att:pa_counter-resolutionhf:att:pa_counter-typehf:att:pa_countershf:att:pa_digital-i-ohf:att:pa_fifohf:att:pa_four20mahf:att:pa_inputshf:att:pa_isolationhf:att:pa_kithf:att:pa_lrg-fifohf:att:pa_on-board-calhf:att:pa_optoshf:att:pa_outputshf:att:pa_pcie-laneshf:att:pa_pcie-x1-expansionhf:att:pa_proghf:att:pa_prot-cfghf:att:pa_quad-inputshf:att:pa_receiver-typehf:att:pa_relayhf:att:pa_reshf:att:pa_res-inputhf:att:pa_rs-232hf:att:pa_rs-422hf:att:pa_rs-485hf:att:pa_speedhf:att:pa_uni-rghf:att:pa_uni-rg-inputhf:att:pa_xt
USB-DO2424 OutYes24 SSNoneNoYesLearn Moreyesnonone24-outyesyes24-ssyes
USB-DIO24DO1224 I/O (8/8/4/4)Yes12 SSNoneNoYesLearn Moreyesnonone24-i-o-8-8-4-4yesyes12-ssyes
USB-DIO48DO2448 I/O (8/8/4/4 ×2)Yes24 SSNoneNoYesLearn Moreyesnonone48-i-o-8-8-4-4-x2yesyes24-ssyes
USB-IDO-1616 OutYes16 SSNoneNoYesLearn Morenononone16-outyesno16-ssyes
USB-IDIO-1616 In & 16 OutYes16 SSNoneNoYesLearn Morenononone16-in-16-outyesno16-ssyes
USB-IDIO-44 In & 4 OutYes4 SSNoneNoYesLearn Morenononone4-in-4-outyesno4-ssyes
USB-IDIO-88 In & 8 OutYes8 SSNoneNoYesLearn Morenononone8-in-8-outyesno8-ssyes
USB-IDIO-4L4 In & 4 OutYes4 SSNoneNoYesLearn Morenononone4-in-4-outyesno4-ssyes
USB-IDIO-8L8 In & 8 OutYes8 SSNoneNoYesLearn Morenononone8-in-8-outyesno8-ssyes
USB-IDO-16L16 OutYes16 SSNoneNoYesLearn Morenononone16-outyesno16-ssyes
USB-IDIO-16L16 In & 16 OutYes16 SSNoneNoYesLearn Morenononone16-in-16-outyesno16-ssyes
USB-II-1616 InYesNoneNoneNoYesLearn Morenononone16-inyesnononeyes
USB-IIRO-44 In & 4 OutYes4 EMNoneNoYesLearn Morenononone4-in-4-outyesno4yes
USB-IIRO-88 In & 8 OutYes8 EMNoneNoYesLearn Morenononone8-in-8-outyesno8yes
USB-RO-1616 OutYes16 EMNoneNoYesLearn Morenononone16-outyesno16yes
USB-IIRO-1616 In & 16 OutYes16 EMNoneNoYesLearn Morenononone16-in-16-outyesno16yes
USB-IIRO4-2SM4 In & 4 OutYes4 EMNoneNoNoLearn Moreplug-play460-8knodb25f db9mx2nonone4-in-4-outnonoyesnojumper4222no
USB-COM-2SMNoNoneNoneNoNoLearn Moreplug-play460-8knodb9mx2nonone573nonononojumpernone222no
USB-IIRO-4DB4 In & 4 OutYes4 EMNoneNoNoLearn Moreplug-playn-anodb25fnonone4-in-4-outnonoyesnon-a4nonenonenoneno
USBP-II8IDO4A8 In & 4 OutYes4 SSYesLearn Moreno641no5716298-in-4-outnoyes2-seyesno4-ss164khz1yes

Ethernet

ModelDigital I/OOPTOsRelayCTRSCOSXThf:att:pa_addr-cfghf:att:pa_autocalhf:att:pa_baudhf:att:pa_bip-rghf:att:pa_bip-rg-inputhf:att:pa_buffhf:att:pa_bus-connhf:att:pa_cable-typehf:att:pa_connectorhf:att:pa_coshf:att:pa_counter-resolutionhf:att:pa_counter-typehf:att:pa_countershf:att:pa_digital-i-ohf:att:pa_fifohf:att:pa_four20mahf:att:pa_inputshf:att:pa_isolationhf:att:pa_kithf:att:pa_lrg-fifohf:att:pa_on-board-calhf:att:pa_optoshf:att:pa_outputshf:att:pa_pcie-laneshf:att:pa_pcie-x1-expansionhf:att:pa_proghf:att:pa_prot-cfghf:att:pa_quad-inputshf:att:pa_receiver-typehf:att:pa_relayhf:att:pa_reshf:att:pa_res-inputhf:att:pa_rs-232hf:att:pa_rs-422hf:att:pa_rs-485hf:att:pa_speedhf:att:pa_uni-rghf:att:pa_uni-rg-inputhf:att:pa_xt
ETH-IDIO-1616 In & 16 OutYes16 SSYesLearn Moreyes57162916-in-16-outyesno16-ssyes
ETH-IDIO-88 In & 8 OutYes8 SSYesLearn Moreyes5716298-in-8-outyesno8-ssyes
ETH-IDIO-44 In & 4 OutYes4 SSYesLearn Moreyes5716294-in-4-outyesno4-ssyes
ETH-IDO-1616 OutYes16 SSYesLearn Moreyes57162916-outyesno16-ssyes
ETH-II-44 InYesYesLearn Moreyes5716294-inyesno570yes
ETH-II-88 InYesYesLearn Moreyes5716298-inyesno570yes
ETH-IIRO-1616 In & 16 OutYes16 EMYesLearn Moreyes57162916-in-16-outyesno16yes
ETH-IIRO-88 In & 8 OutYes8 EMYesLearn Moreyes5716298-in-8-outyesno8yes
ETH-IIRO-44 In & 4 OutYes4 EMYesLearn Moreyes5716294-in-4-outyesno4yes
ETH-II-1616 InYesYesLearn Moreyes57162916-inyesno570yes
ETH-RO-1616 OutYes16 EMYesLearn Moreyes57162916-outyesno16yes

PCI Express Mini

ModelDigital I/OOPTOsRelayCTRSCOSXThf:att:pa_addr-cfghf:att:pa_autocalhf:att:pa_baudhf:att:pa_bip-rghf:att:pa_bip-rg-inputhf:att:pa_buffhf:att:pa_bus-connhf:att:pa_cable-typehf:att:pa_connectorhf:att:pa_coshf:att:pa_counter-resolutionhf:att:pa_counter-typehf:att:pa_countershf:att:pa_digital-i-ohf:att:pa_fifohf:att:pa_four20mahf:att:pa_inputshf:att:pa_isolationhf:att:pa_kithf:att:pa_lrg-fifohf:att:pa_on-board-calhf:att:pa_optoshf:att:pa_outputshf:att:pa_pcie-laneshf:att:pa_pcie-x1-expansionhf:att:pa_proghf:att:pa_prot-cfghf:att:pa_quad-inputshf:att:pa_receiver-typehf:att:pa_relayhf:att:pa_reshf:att:pa_res-inputhf:att:pa_rs-232hf:att:pa_rs-422hf:att:pa_rs-485hf:att:pa_speedhf:att:pa_uni-rghf:att:pa_uni-rg-inputhf:att:pa_xt
mPCIe-IDIO-44 In & 4 OutYes4 SSYesYesLearn Moreyes6294-in-4-outyes4-ssyes
mPCIe-IDIO-88 In & 8 OutYes8 SSYesYesLearn Moreyes6298-in-8-outyes8-ssyes
mPCIe-IDO-88 OutNo8 SSNoYesLearn Moreno6298-outno8-ssyes
mPCIe-II-44 InYesYesYesLearn Moreyes6294-inyes570yes
mPCIe-II-88 InYesYesYesLearn Moreyes6298-inyes570yes
mPCIe-II-1616 InYesYesYesLearn Moreyes62916-inyes570yes
mPCIe-IIRO-44 In & 4 OutYes4 EMYesYesLearn Moreyes6294-in-4-outyes4yes
mPCIe-RO-88 OutNo8 EMNoYesLearn Moreno6298-outno8yes
mPCIe-IIRO-88 In & 8 OutYes8 EMYesYesLearn Moreyes6298-in-8-outyes8yes

M.2

ModelDigital I/OOPTOsRelayCTRSCOSXThf:att:pa_addr-cfghf:att:pa_autocalhf:att:pa_baudhf:att:pa_bip-rghf:att:pa_bip-rg-inputhf:att:pa_buffhf:att:pa_bus-connhf:att:pa_cable-typehf:att:pa_connectorhf:att:pa_coshf:att:pa_counter-resolutionhf:att:pa_counter-typehf:att:pa_countershf:att:pa_digital-i-ohf:att:pa_fifohf:att:pa_four20mahf:att:pa_inputshf:att:pa_isolationhf:att:pa_kithf:att:pa_lrg-fifohf:att:pa_on-board-calhf:att:pa_optoshf:att:pa_outputshf:att:pa_pcie-laneshf:att:pa_pcie-x1-expansionhf:att:pa_proghf:att:pa_prot-cfghf:att:pa_quad-inputshf:att:pa_receiver-typehf:att:pa_relayhf:att:pa_reshf:att:pa_res-inputhf:att:pa_rs-232hf:att:pa_rs-422hf:att:pa_rs-485hf:att:pa_speedhf:att:pa_uni-rghf:att:pa_uni-rg-inputhf:att:pa_xt
M.2-IDIO-88 In & 8 OutYes8 SSYesYesLearn Moreyes6298-in-8-outyes8-ssyes
M.2-IDO-88 OutNo8 SSNoYesLearn Moreno6298-outno8-ssyes
M.2-IDIO-44 In & 4 OutYes4 SSYesYesLearn Moreyes6294-in-4-outyes4-ssyes
M.2-II-44 InYesYesYesLearn Moreyes6294-inyes570yes
M.2-II-88 InYesYesYesLearn Moreyes6298-inyes570yes
M.2-II-1616 InYesYesYesLearn Moreyes62916-inyes570yes
M.2-IIRO-88 In & 8 OutYes8 EMYesYesLearn Moreyes6298-in-8-outyes8yes
M.2-RO-88 OutNo8 EMNoYesLearn Moreno6298-outno8yes
M.2-IIRO-44 In & 4 OutYes4 EMYesYesLearn Moreyes6294-in-4-outyes4yes

PCI

ModelDigital I/OOPTOsRelayCTRSCOSXThf:att:pa_addr-cfghf:att:pa_autocalhf:att:pa_baudhf:att:pa_bip-rghf:att:pa_bip-rg-inputhf:att:pa_buffhf:att:pa_bus-connhf:att:pa_cable-typehf:att:pa_connectorhf:att:pa_coshf:att:pa_counter-resolutionhf:att:pa_counter-typehf:att:pa_countershf:att:pa_digital-i-ohf:att:pa_fifohf:att:pa_four20mahf:att:pa_inputshf:att:pa_isolationhf:att:pa_kithf:att:pa_lrg-fifohf:att:pa_on-board-calhf:att:pa_optoshf:att:pa_outputshf:att:pa_pcie-laneshf:att:pa_pcie-x1-expansionhf:att:pa_proghf:att:pa_prot-cfghf:att:pa_quad-inputshf:att:pa_receiver-typehf:att:pa_relayhf:att:pa_reshf:att:pa_res-inputhf:att:pa_rs-232hf:att:pa_rs-422hf:att:pa_rs-485hf:att:pa_speedhf:att:pa_uni-rghf:att:pa_uni-rg-inputhf:att:pa_xt
LPCI-IIRO-88 In & 8 OutYes8 EMYesYesLearn Moreyes6298-in-8-outyes8yes
PCI-IDI-32A32 InYesNoLearn More57162932-inyes570no
PCI-IDI-32B32 InYesNoLearn More57162932-inyes570no
PCI-IDI-32AC32 InYesYesNoLearn Moreyes62932-inyes570no
PCI-IDI-32BC32 InYesYesNoLearn Moreyes62932-inyes570no
PCI-IDI-48A48 InYesNoLearn More57162948-inyes570no
PCI-IDI-48B48 InYesNoLearn More57162948-inyes570no
PCI-IDI-48AC48 InYesYesNoLearn Moreyes62948-inyes570no
PCI-IDI-48BC48 InYesYesNoLearn Moreyes62948-inyes570no
PCI-IDI-16A16 InYesNoLearn More57162916-inyes570no
PCI-IDI-16B16 InYesNoLearn More57162916-inyes570no
PCI-IDI-16AC16 InYesYesNoLearn Moreyes62916-inyes570no
PCI-IDI-16BC16 InYesYesNoLearn Moreyes62916-inyes570no
PCI-IDIO-1616 In & 16 OutYes16 SSYesLearn More57162916-in-16-outyes16-ssyes
PCI-IDO-3232 OutYes32 SSYesLearn More57162932-outyes32-ssyes
PCI-IDO-4848 OutYes48 SSYesLearn More57162948-outyes48-ssyes
PCI-IDO-1616 OutYes16 SSYesLearn More57162916-outyes16-ssyes
PCI-IDO-16A16 OutYes16 SSYesLearn More57162916-outyes16-ssyes
PCI-IDO-32A32 OutYes32 SSYesLearn More57162932-outyes32-ssyes
PCI-IDO-48A48 OutYes48 SSYesLearn More57162948-outyes48-ssyes
PCI-IIRO-88 In & 8 OutYes8 EMYesYesLearn Moreyes6298-in-8-outyes8yes
PCI-IIRO-1616 In & 16 OutYes16 EMYesYesLearn Moreyes62916-in-16-outyes16yes

PC/104

ModelDigital I/OOPTOsRelayCTRSCOSXThf:att:pa_addr-cfghf:att:pa_autocalhf:att:pa_baudhf:att:pa_bip-rghf:att:pa_bip-rg-inputhf:att:pa_buffhf:att:pa_bus-connhf:att:pa_cable-typehf:att:pa_connectorhf:att:pa_coshf:att:pa_counter-resolutionhf:att:pa_counter-typehf:att:pa_countershf:att:pa_digital-i-ohf:att:pa_fifohf:att:pa_four20mahf:att:pa_inputshf:att:pa_isolationhf:att:pa_kithf:att:pa_lrg-fifohf:att:pa_on-board-calhf:att:pa_optoshf:att:pa_outputshf:att:pa_pcie-laneshf:att:pa_pcie-x1-expansionhf:att:pa_proghf:att:pa_prot-cfghf:att:pa_quad-inputshf:att:pa_receiver-typehf:att:pa_relayhf:att:pa_reshf:att:pa_res-inputhf:att:pa_rs-232hf:att:pa_rs-422hf:att:pa_rs-485hf:att:pa_speedhf:att:pa_uni-rghf:att:pa_uni-rg-inputhf:att:pa_xt
104-IDIO-1616 In & 16 OutYes16 SSYesYesLearn Moreyes62916-in-16-outyes16-ssyes
104-IDIO-16E16 In & 16 OutYes16 SSNoYesLearn Moreno62916-in-16-outyes16-ssyes
104-IDO-1616 OutYes16 SSNoYesLearn Moreno62916-outyes16-ssyes
104-II-1616 InYesYesYesLearn Moreyes62916-inyes570yes
104-IDO-88 OutYes8 SSNoYesLearn Moreno6298-outyes8-ssyes
104-IDIO-88 In & 8 OutYes8 SSYesYesLearn Moreyes6298-in-8-outyes8-ssyes
104-IDIO-8E8 In & 8 OutYes8 SSNoYesLearn Moreno6298-in-8-outyes8-ssyes
104-II32-4RO32 In & 4 OutYes4 EMYesYesLearn Moreyes62932-in-4-outyes4yes
104-IIRO-1616 In & 16 OutYes16 EMYesNoLearn Moreyes62916-in-16-outyes16no
104-IIRO-16E16 In & 16 OutYes16 EMNoNoLearn Moreno62916-in-16-outyes16no
104-RO-1616 OutYes16 EMNoNoLearn Moreno62916-outyes16no
104-IIRO-88 In & 8 OutYes8 EMYesYesLearn Moreyes6298-in-8-outyes8yes
104-IIRO-8E8 In & 8 OutYes8 EMNoYesLearn Moreno6298-in-8-outyes8yes

Wireless

ModelDescriptionLearn More
WM-IIRO-88-Channel optically isolated input / electromechanical relay output module.Learn More
WWP-IIRO-8A unique automated solution to wirelessly transmit the state of 8 isolated inputs up to 7 miles to 8 corresponding relay outputs — bidirectionally, with no computer involved!Learn More

Remote Data Acquisition

ModelDescriptionLearn More
WM-IIRO-88-Channel optically isolated input / electromechanical relay output module.Learn More
WWP-IIRO-8A unique automated solution to wirelessly transmit the state of 8 isolated inputs up to 7 miles to 8 corresponding relay outputs — bidirectionally, with no computer involved!Learn More