Relay Interfaces

Relay interfaces are devices for housing relays. They're a convenient way to organise and operate relays and they can also improve relay performance.

Every relay contains contacts, which are pieces of electrically conductive material, usually metal. When a pair of contacts touch, they pass an electrical current, making the switch ’closed'. When the contacts separate, the switch is ’open' and the current stops flowing. As well as housing relays, relay interfaces can be used to operate a relay's contacts.

How do relay interfaces work?

Relay interfaces can be convenient ways to operate relays. Relays are inserted into the slot or slots in the interface and they stay snugly mounted there until they're ejected. The relay interfaces commonly contain switches that make the contacts in each relay ’closed’ (on) or ’open’ (off).

Relay interfaces can also contain protection circuits that expand the range of relay input voltage.

Types of relay interfaces

Each relay interfaces is compatible with a specific relay, or several different relays. The relays may be stacked pyramidally or slotted in side by side. Relay interfaces also differentiated by their voltages, which can be AC, DC or AC/DC.


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Description Price Accessory Type For Use With Series Voltage Current Rating
RS Stock No. 251-9455
Mfr. Part No.2966016
MYR84.91
Each
units
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MYR19.91
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Module RT78724, RT78726 - 24V dc -
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Mfr. Part No.99.02.9.024.99
BrandFinder
MYR24.45
Each
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- - 99 Series 24V dc -
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MYR37.79
Each
units
Plug In Module PR1 Series, PR2 Series LDP- 12- 24DC 24V dc -
RS Stock No. 472-9171
Mfr. Part No.3RF2950-0HA13
BrandSiemens
MYR2,137.98
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Power Controller 3RF29 - 230V ac 50A
RS Stock No. 410-8035
Mfr. Part No.2296058
MYR556.59
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units
- - PLC-V8/D15S/OUT 24V dc 3A
RS Stock No. 827-7182
Mfr. Part No.ZBRA1
MYR1,242.78
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Relay Antenna XB4R 22 mm (Dia) Control Unit, XB5R Harmony XB5R 24 → 240V ac -
RS Stock No. 210-4414
Mfr. Part No.3RF2920-0GA13
BrandSiemens
MYR663.45
Each
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- 3RF29 3RF2 230V -
RS Stock No. 776-1626
Mfr. Part No.072.503
BrandFinder
MYR11.61
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Separator Finder 500 mm Electrodes 72 Series - -
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Mfr. Part No.093.01
BrandFinder
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Separator 93 Series 93 Series - -
RS Stock No. 210-4416
Mfr. Part No.3RF2950-0GA16
BrandSiemens
MYR837.21
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- 3RF29 3RF2 600V -
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Mfr. Part No.PTMG0024 2-1415036-1
MYR19.13
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LED Module RT Series - 24V dc -
RS Stock No. 211-3671
Mfr. Part No.3RF2950-0KA13
BrandSiemens
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Power Controller 3RF2 3RF29 24V ac/dc -
New
RS Stock No. 220-8979
Mfr. Part No.193-ECM-PCM
MYR198.47
Each
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Interface Relay E200 193-ECM - -
RS Stock No. 618-8881
Mfr. Part No.2966236
MYR138.34
1 Bag of 5
Bag(s)
- - - - 6A
RS Stock No. 192-1129
Mfr. Part No.1SNA645071R0000
BrandABB
MYR110.64
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Interface Relay - - 24V dc -
RS Stock No. 512-922
Mfr. Part No.PTML0524 6-1415036-1
MYR19.13
Each
units
LED Plug In Module RT78724, RT78726 - 6 → 24V ac/dc -
RS Stock No. 213-0736
Mfr. Part No.3RF2920-0KA13
BrandSiemens
MYR1,469.07
Each
units
- 3RF29 3RF2 230V -
RS Stock No. 192-1130
Mfr. Part No.1SVR405651R3000
BrandABB
MYR35.77
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Socket 2 or 4 c/o (SPDT) Contacts CR-M Relays - - -
RS Stock No. 179-7322
Mfr. Part No.RSB1A120JD
MYR27.23
Each
units
- - RSB 12 Vdc 12A