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. 331-0574
Mfr. Part No.ZENL1111
MYR52.46
Each
units
Harmony XAL Contact Block 1NO - - - Screw No 10A - - -
RS Stock No. 609-3109
Mfr. Part No.ZB5AV5
MYR187.29
Each
units
Harmony XB5 Light Block - - 400V ac - Screw Yes - - - -
RS Stock No. 609-3159
Mfr. Part No.ZB5AZ104
MYR54.03
Each
units
Harmony XB5 Contact Block 2NC - - - Screw Yes 10A - - -
RS Stock No. 330-9833
Mfr. Part No.ZB4BW0B35
MYR83.03
Each
units
Harmony XB4 Contact & Light Block 1NO 1NC - 24V ac/dc LED Screw Yes 10A Yes - -
RS Stock No. 331-0192
Mfr. Part No.ZB4BZ105
MYR49.62
Each
units
Harmony XB4 Contact Block 1NO 1NC - - - Screw Yes 10A - - -
RS Stock No. 411-1362
Mfr. Part No.3SB3400-0C
BrandSiemens
MYR27.71
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No 10A No - -
RS Stock No. 399-3674
Mfr. Part No.218057 & M22-LED-B
BrandEaton
MYR53.65
Each
units
M22 Light Block - - 12 → 30V ac/dc LED Screw No 15mA Yes - -
RS Stock No. 757-8929
Mfr. Part No.1SFA611610R1001 MCB-10
BrandABB
MYR22.33
Each
units
ABB Modular Contact Block 1NO - - - - No - - - -
RS Stock No. 260-312
Mfr. Part No.33EAGL
BrandBACO
MYR55.62
Each
units
BACO Light Block - Green 24V LED Screw No - Yes - -
RS Stock No. 610-3004
Mfr. Part No.ZBZVM
MYR57.54
Each
units
Harmony XB - - - - - - - - - - -
RS Stock No. 330-9726
Mfr. Part No.ZB4BVM5
MYR78.94
Each
units
Harmony XB4 Light Block - - 230 → 240V LED Screw Yes - Yes - -
RS Stock No. 746-8412
Mfr. Part No.ZB4BW055
MYR246.80
Each
units
Harmony XB4 Contact & Light Block 1NO 1NC - 400V ac - Screw Yes 10A No - -
RS Stock No. 331-0580
Mfr. Part No.ZENL1121
MYR56.29
Each
units
Harmony XAL Contact Block 1NC - - - Screw No - - - -
RS Stock No. 610-2938
Mfr. Part No.ZBVM1
MYR126.33
Each
units
Harmony XB Light Block - - 230V LED Screw No - Yes - -
RS Stock No. 331-0445
Mfr. Part No.ZB5AZ101
MYR28.41
Each
units
Harmony XB5 Contact Block 1NO - - - Screw Yes - - - -
RS Stock No. 330-9568
Mfr. Part No.ZB4BV6
MYR29.44
Each
units
Harmony XB4 Light Block - - 250V Incandescent - Yes - No - -
RS Stock No. 760-4646
Mfr. Part No.115964 & M22-SWD-K11
BrandEaton
MYR135.00
Each
units
M22 Contact Block 1CO - - - - No 15mA - - -
RS Stock No. 610-2972
Mfr. Part No.ZBVM6
MYR109.74
Each
units
Harmony XB Light Block - - 230V LED Screw No - Yes - -
RS Stock No. 331-0186
Mfr. Part No.ZB4BZ103
MYR47.92
Each
units
Harmony XB4 Contact Block 2NO - 600V - Screw Yes 10A - - -
RS Stock No. 790-3408
Mfr. Part No.LPXC01
BrandLovato
MYR19.37
Each
units
Platinum 22mm Contact Block 1NC - 690V - Screw No 10A - - -