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. 610-2742
Mfr. Part No.ZALVB1
SGD14.48
Each
units
Harmony ZALV Light Block - White 24 V LED Screw No - Yes - -
RS Stock No. 351-3789
Mfr. Part No.9001KA1
SGD31.49
Each
units
Harmony 9001K Contact Block CO - - - Screw No - No - -
RS Stock No. 746-9204
Mfr. Part No.ZB5AW0B61
SGD18.89
Each
units
Harmony XB5 Contact & Light Block 1NO Blue 24 V ac/dc LED Screw Yes 10 A Yes - -
RS Stock No. 331-0445
Mfr. Part No.ZB5AZ101
SGD8.63
Each
units
Harmony XB5 Contact Block 1NO - - - Screw Yes - - - -
RS Stock No. 610-3133
Mfr. Part No.ZBV6
SGD6.27
Each
units
Harmony XB Light Block - - - Incandescent Screw No - - - -
RS Stock No. 331-0439
Mfr. Part No.ZB5AVM5
SGD32.76
Each
units
Harmony XB5 Light Block - Yellow 230 → 240 V ac LED Screw Yes - Yes - -
RS Stock No. 847-5020
Mfr. Part No.M22-CLED230-G
BrandEaton
SGD23.25
Each
units
M22 Light Block - Green 85 → 264 V ac LED Cage Clamp 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. 399-3747
Mfr. Part No.M22-LED230-R
BrandEaton
SGD31.88
Each
units
M22 Light Block - Red 85 → 264 V ac LED Screw No 15 mA Yes - -
RS Stock No. 746-9190
Mfr. Part No.ZB5AW0B41
SGD23.95
Each
units
Harmony XB5 Contact & Light Block 1NO Red 24 V ac/dc LED Screw Yes 10 A Yes - -
RS Stock No. 399-3753
Mfr. Part No.M22-LED230-G
BrandEaton
SGD31.88
Each
units
M22 Light Block - Green 85 → 264 V ac LED Screw No 15 mA Yes - -
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. 610-2893
Mfr. Part No.ZBVG1
SGD75.62
Each
units
Harmony XB Light Block - White 110 → 120 V LED Screw No - - - -
RS Stock No. 757-8929
Mfr. Part No.MCB-10
BrandABB
SGD8.53
Each
units
ABB Modular Contact Block 1NO - - - - No - - - -
RS Stock No. 331-0580
Mfr. Part No.ZENL1121
SGD20.27
Each
units
Harmony XAL Contact Block 1NC - - - Screw No - - - -
RS Stock No. 331-0388
Mfr. Part No.ZB5AVB4
SGD15.04
Each
units
Harmony XB5 Light Block - Red 24 V ac/dc LED Screw Yes - Yes - -
RS Stock No. 330-9760
Mfr. Part No.ZB4BW061
SGD16.64
Each
units
Harmony XB4 Contact & Light Block 1NO - 250 V - Screw Yes 10 A No - -
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. 330-9546
Mfr. Part No.ZB4BV4
SGD54.51
Each
units
Harmony XB4 Light Block - - - Incandescent BA 9s Base Fitting Yes - No - -
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