Contact Blocks & Light Blocks

Contact Blocks
A contact block is an electrical circuit connector that is used to turn on (make) or turn off (break) an electrical circuit. Contact blocks are commonly found connected to switches, relays and circuit breakers, once these devices are active the contact block allows current to flow and complete a circuit.
Types of Contact Block
Contact blocks are usually designed as an accessory to fit a specific device, therefore matching the correct contact block and device are essential. The contact blocks are available with a wide range of contact configurations that allow the main device to change a circuit in many different ways. Typical contact configurations available are:
• 1NO (One normally open contact)
• 1NC (One normally closed contact)
• 1NO/1NC (One normally open and one normally closed)
• 2NO (Two normally open contact)
• 2NC (Two normally closed contact)
• 2NO/2NC (Two normally open and two normally closed)

Light Blocks
Push button light blocks are an addon block that mount to the rear of a push button switch alongside the contact blocks to act as an indicator light. The light blocks are turned on when the push button is pressed and illuminate through the button head.
Types of Light Block
Light blocks are available in two types:
• LED - These light blocks feature a fixed bright LED that is designed to last the lifetime of the push button. LED light blocks are available in a variety of colours to match the button colour.
• Incandescent - These light blocks feature a changeable incandescent bulb. The bulbs produce a white light that shines through the button head to produce the required colour.

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Description Price Series Block Type Contact Configuration Illumination Colour Voltage Rating Illumination Type Terminal Type Body/Fixing Collar Included Current Rating LED Included For Use With Accessory Type
RS Stock No. 187-8916
Mfr. Part No.8LM2TC10A
BrandLovato
TWD201.00
Each
units
8LM2T Auxiliary Contact Block NO - 690V - Screw - 10A - - -
RS Stock No. 757-8939
Mfr. Part No.1SFA611610R1020 MCB-02
BrandABB
TWD364.00
Each
units
ABB Modular Contact Block 2NC - - - - No - - - -
RS Stock No. 422-8375
Mfr. Part No.ZB5AVM6
TWD758.00
Each
units
Harmony XB5 Light Block - - 230 → 240V ac LED Screw Yes - Yes - -
RS Stock No. 342-0687
Mfr. Part No.ZB6EH0B
TWD538.00
Each
units
Harmony XB6 Light Block - - 230/240V ac/dc LED - Yes - - - -
RS Stock No. 724-9577
Mfr. Part No.ZBE504
TWD530.00
Each
units
Harmony XB Contact Block 2NC - - - Screw No - - - -
RS Stock No. 610-3133
Mfr. Part No.ZBV6
TWD164.00
Each
units
Harmony XB Light Block - - - Incandescent Screw No - - - -
RS Stock No. 173-6817
Mfr. Part No.3SU1400-1AA10-1LA0
BrandSiemens
TWD359.00
Each
units
SIRIUS ACT Contact Block SPDT - 500V ac/dc - Screw - 10A - - -
RS Stock No. 206-5777
Mfr. Part No.101006547
TWD633.00
Each
units
EF103.1 Contact Block SPDT - 230V ac - Screw - - - - -
RS Stock No. 193-2549
Mfr. Part No.3SU1401-1BG00-1AA0
BrandSiemens
TWD425.00
Each
units
SIRIUS ACT - - - - LED Screw - 20mA Yes - -
RS Stock No. 193-2720
Mfr. Part No.3SU1551-1AB60-3PA0
BrandSiemens
TWD1,082.00
Each
units
SIRIUS ACT Contact Block - - 24 ... 24V LED - - - Yes - -
RS Stock No. 168-2860
Mfr. Part No.XW1E-BV404MFRH-EMO
BrandIdec
TWD1,221.00
Each
units
XW Contact Block 4NC - - - Screw - 10A - - -
RS Stock No. 330-9934
Mfr. Part No.ZB4BW0M11
TWD1,103.00
Each
units
Harmony XB4 Contact & Light Block 2NO - 230 → 240V ac LED Screw Yes 10A Yes - -
RS Stock No. 815-1884
Mfr. Part No.ZB4BZ1029
TWD744.00
Each
units
Harmony XB4 - - - - - - - - - - -
RS Stock No. 330-9603
Mfr. Part No.ZB4BVB4
TWD305.00
Each
units
Harmony XB4 Light Block - - 24V LED Screw Yes - Yes - -
RS Stock No. 351-3846
Mfr. Part No.9001KA3G
TWD857.00
Each
units
Harmony 9001K Contact Block 1NC - - - - - - - - -
RS Stock No. 193-2578
Mfr. Part No.3SU1401-1BG20-3AA0
BrandSiemens
TWD453.00
Each
units
SIRIUS ACT - - Red - LED - - 20mA Yes - -
RS Stock No. 553-888
Mfr. Part No.ZBVM65
TWD2,248.00
Each
units
Harmony XB Light Block - Blue 230V LED Screw Clamp No - Yes - -
RS Stock No. 168-2859
Mfr. Part No.XW1E-BV403MFRH-EMO
BrandIdec
TWD1,161.00
Each
units
XW Contact Block 3NC - - - Screw - 10A - - -
RS Stock No. 814-7163
Mfr. Part No.9001KM1
TWD4,023.00
Each
units
Harmony 9001K Light Block - - - - - - - - - -
RS Stock No. 193-2719
Mfr. Part No.3SU1551-1AB60-3NA0
BrandSiemens
TWD1,146.00
Each
units
SIRIUS ACT Contact Block - - 24 ... 24V LED - - - Yes - -