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. 553-844
Mfr. Part No.ZBE1025
MYR24.02
Each
units
Harmony XB Contact Block 1NC - - - Screw Clamp No - - - -
RS Stock No. 260-233
Mfr. Part No.33EAWL
BrandBACO
MYR55.62
Each
units
BACO Light Block - White 24V LED Screw No - Yes - -
RS Stock No. 331-0524
Mfr. Part No.ZALVB3
MYR46.92
Each
units
Harmony ZALV Light Block - - 24V LED Screw No - Yes - -
RS Stock No. 422-8612
Mfr. Part No.ZB5AW0M35
MYR169.06
Each
units
Harmony XB5 Contact & Light Block - - 230 → 240V ac LED Screw Yes - - - -
RS Stock No. 610-2966
Mfr. Part No.ZBVM5
MYR114.99
Each
units
Harmony XB Light Block - - 230V LED Screw No - Yes - -
RS Stock No. 330-9732
Mfr. Part No.ZB4BVM6
MYR87.02
Each
units
Harmony XB4 Light Block - - 230 → 240V LED Screw Yes - Yes - -
RS Stock No. 260-413
Mfr. Part No.33S10
BrandBACO
MYR22.83
Each (In a Pack of 5)
units
BACO Contact Block 1NO - 600V - Screw No 10A - - -
RS Stock No. 342-0491
Mfr. Part No.ZB6Z5B
MYR58.61
Each
units
Harmony XB6 Contact Block 1NO 1NC - - - Faston Yes - - - -
RS Stock No. 746-9190
Mfr. Part No.ZB5AW0B41
MYR86.38
Each
units
Harmony XB5 Contact & Light Block 1NO - 24V ac/dc LED Screw Yes 10A Yes - -
RS Stock No. 330-9782
Mfr. Part No.ZB4BW065
MYR79.41
Each
units
Harmony XB4 Contact & Light Block 1NO 1NC - 250V - Screw Yes 10A No - -
RS Stock No. 553-995
Mfr. Part No.ZB4BZ1015
MYR34.98
Each
units
Harmony XB4 Contact Block 1NO - - - Screw Clamp Yes - - - -
RS Stock No. 422-8369
Mfr. Part No.ZB5AVM1
MYR91.22
Each
units
Harmony XB5 Light Block - - 230 → 240V ac LED Screw Yes - Yes - -
RS Stock No. 526-8655
Mfr. Part No.3LD9280-0C
BrandSiemens
MYR158.24
Each
units
- - - - - - - - - - - -
RS Stock No. 330-9704
Mfr. Part No.ZB4BVM3
MYR105.76
Each
units
Harmony XB4 Light Block - - 230 → 240V LED Screw Yes - Yes - -
RS Stock No. 399-3747
Mfr. Part No.216564 & M22-LED230-R
BrandEaton
MYR99.77
Each
units
M22 Light Block - - 85 → 264V ac LED Screw No 15mA Yes - -
RS Stock No. 874-2282
Mfr. Part No.3SU1550-1AA10-1BA0
BrandSiemens
MYR35.74
Each
units
SIRIUS ACT Contact Block 1NO - 5 → 500V ac/dc - Screw Yes 6A No - -
RS Stock No. 610-2922
Mfr. Part No.ZBVG5
MYR72.14
Each
units
Harmony XB Light Block - - - LED Screw No - - - -
RS Stock No. 330-9962
Mfr. Part No.ZB4BW0M35
MYR180.81
Each
units
Harmony XB4 Contact & Light Block 1NO 1NC - 230 → 240V ac LED Screw Yes 10A Yes - -
RS Stock No. 351-3795
Mfr. Part No.9001KA2
MYR83.53
Each
units
Harmony 9001K Contact Block 1NO - - - - - - - - -
RS Stock No. 330-9940
Mfr. Part No.ZB4BW0M15
MYR180.81
Each
units
Harmony XB4 Contact & Light Block 1NO - 230 → 240V ac LED Screw Yes 10A Yes - -