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. 610-2893
Mfr. Part No.ZBVG1
SGD70.88
Each
units
Harmony XB Light Block - White 110 → 120 V LED Screw No - - - -
RS Stock No. 399-3769
Mfr. Part No.M22-LED230-B
BrandEaton
SGD36.56
Each
units
M22 Light Block - Blue 85 → 264 V ac LED Screw No 15 mA Yes - -
RS Stock No. 399-3731
Mfr. Part No.M22-LED230-W
BrandEaton
SGD34.83
Each
units
M22 Light Block - White 230 V LED Screw No 15 mA Yes - -
RS Stock No. 331-0467
Mfr. Part No.ZB5AZ102
SGD10.44
Each
units
Harmony XB5 Contact Block 1NC - - - Screw Yes 10 A - - -
RS Stock No. 331-0580
Mfr. Part No.ZENL1121
SGD19.87
Each
units
Harmony XAL Contact Block 1NC - - - Screw No - - - -
RS Stock No. 610-2786
Mfr. Part No.ZBE203
SGD17.99
Each
units
Harmony XB Contact Block 2NO - - - Screw No - - - -
RS Stock No. 331-0388
Mfr. Part No.ZB5AVB4
SGD14.75
Each
units
Harmony XB5 Light Block - Red 24 V ac/dc LED Screw Yes - Yes - -
RS Stock No. 330-9546
Mfr. Part No.ZB4BV4
SGD54.51
Each
units
Harmony XB4 Light Block - - - Incandescent BA 9s Base Fitting Yes - No - -
RS Stock No. 610-2887
Mfr. Part No.ZBVBG4
SGD22.18
Each
units
Harmony XB Light Block - Red 24 → 120 V LED Screw No - - - -
RS Stock No. 609-3165
Mfr. Part No.ZB5AZ105
SGD16.59
Each
units
Harmony XB5 Contact Block 1NO 1NC - - - Screw Yes 10 A - - -
RS Stock No. 330-9603
Mfr. Part No.ZB4BVB4
SGD13.24
Each
units
Harmony XB4 Light Block - Red 24 V LED Screw Yes - Yes - -
RS Stock No. 422-8870
Mfr. Part No.ZB6EB1B
SGD13.04
Each
units
Harmony XB6 Light Block - White 30 V ac/dc LED Faston Connectors Yes 15 mA - - -
RS Stock No. 330-9990
Mfr. Part No.ZB4BW0M55
SGD50.12
Each
units
Harmony XB4 Contact & Light Block 1NO 1NC Yellow 230 → 240 V ac LED Screw Yes 10 A Yes - -
RS Stock No. 610-2865
Mfr. Part No.ZBVBG1
SGD18.45
Each
units
Harmony XB Light Block - White 24 → 120 V LED Screw No - - - -
RS Stock No. 609-2689
Mfr. Part No.ZB4BV5D1
SGD91.18
Each
units
Harmony XB4 Light Block - White - LED BA 9s Base Fitting Yes - Yes - -
RS Stock No. 342-2908
Mfr. Part No.ZB5AZ103
SGD14.65
Each
units
Harmony XB5 Contact Block 2NO - - - Screw Yes 10 A - - -
RS Stock No. 330-9760
Mfr. Part No.ZB4BW061
SGD16.31
Each
units
Harmony XB4 Contact & Light Block 1NO - 250 V - Screw Yes 10 A No - -
RS Stock No. 610-2859
Mfr. Part No.ZBVB6
SGD17.34
Each
units
Harmony XB Light Block - Blue 24 V LED Screw No - - - -
RS Stock No. 455-5346
Mfr. Part No.3SB3420-1A
BrandSiemens
SGD11.64
Each
units
Siemens 3SB3 Light Block - - - BA9S Bulb Screw No - No - -
RS Stock No. 757-8913
Mfr. Part No.1SFA611605R1110
BrandABB
SGD9.66
Each
units
ABB Modular Contact Block 1NC - - - - Yes - - - -
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