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. 746-8412
Mfr. Part No.ZB4BW055
MYR249.39
Each
units
Harmony XB4 Contact & Light Block 1NO 1NC - 400 V ac - Screw Yes 10 A No - -
RS Stock No. 331-0580
Mfr. Part No.ZENL1121
MYR50.99
Each
units
Harmony XAL Contact Block 1NC - - - Screw No - - - -
RS Stock No. 790-3408
Mfr. Part No.LPXC01
BrandLovato
MYR18.33
Each
units
Platinum 22mm Contact Block 1NC - 690 V - Screw No 10 A - - -
RS Stock No. 330-9596
Mfr. Part No.ZB4BVB3
MYR46.06
Each
units
Harmony XB4 Light Block - Green 24 V LED Screw Yes - Yes - -
RS Stock No. 610-2972
Mfr. Part No.ZBVM6
MYR101.26
Each
units
Harmony XB Light Block - Blue 230 V LED Screw No - Yes - -
RS Stock No. 760-4646
Mfr. Part No.M22-SWD-K11
BrandEaton
MYR150.00
Each
units
M22 Contact Block 1CO - - - Smartwire No 15 mA - - -
RS Stock No. 331-0186
Mfr. Part No.ZB4BZ103
MYR52.40
Each
units
Harmony XB4 Contact Block 2NO - 600 V - Screw Yes 10 A - - -
RS Stock No. 330-9568
Mfr. Part No.ZB4BV6
MYR33.42
Each
units
Harmony XB4 Light Block - - 250 V Incandescent BA 9s Base Fitting Yes - No - -
RS Stock No. 331-0445
Mfr. Part No.ZB5AZ101
MYR29.54
Each
units
Harmony XB5 Contact Block 1NO - - - Screw Yes - - - -
RS Stock No. 331-0417
Mfr. Part No.ZB5AVM3
MYR92.06
Each
units
Harmony XB5 Light Block - Green 230 → 240 V ac LED Screw Yes - Yes - -
RS Stock No. 746-8863
Mfr. Part No.ZD4PA203
MYR156.32
Each
units
Harmony XB4 Contact Block - - - - Screw Yes - - - -
RS Stock No. 610-2815
Mfr. Part No.ZBVB1
MYR59.97
Each
units
Harmony XB Light Block - White 24 V LED Screw No - - - -
RS Stock No. 330-9861
Mfr. Part No.ZB4BW0B42
MYR74.45
Each
units
Harmony XB4 Contact & Light Block 1NC Red 24 V ac/dc LED Screw Yes 10 A Yes - -
RS Stock No. 110-4502
Mfr. Part No.M22-CLEDC-G
BrandEaton
MYR52.37
Each
units
M22 Light Block - Green 12 → 30 V ac/dc LED Cage Clamp - - Yes - -
RS Stock No. 124-5192
Mfr. Part No.M22-FK10
BrandEaton
MYR32.56
Each
units
M22 - - - - - - - - - - -
RS Stock No. 330-9748
Mfr. Part No.ZB4BW035
MYR233.46
Each
units
Harmony XB4 Contact & Light Block 1NO 1NC Green 110 → 120 V ac LED Screw Yes 10 A Yes - -
RS Stock No. 422-8842
Mfr. Part No.ZB6E1B
MYR16.78
Each
units
Harmony XB6 Contact Block 1NO - - - - - - - - -
RS Stock No. 610-2859
Mfr. Part No.ZBVB6
MYR58.71
Each
units
Harmony XB Light Block - Blue 24 V LED Screw No - - - -
RS Stock No. 399-3731
Mfr. Part No.M22-LED230-W
BrandEaton
MYR120.30
Each
units
M22 Light Block - White 230 V LED Screw No 15 mA Yes - -
RS Stock No. 609-3121
Mfr. Part No.ZB5AW0B31
MYR82.24
Each
units
Harmony XB5 Contact & Light Block 1NO Green 24 V ac/dc LED Screw Yes 10 A Yes - -