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. 401-309
Mfr. Part No.ZB6EM3B
TWD829.80
Each (In a Pack of 5)
units
Harmony XB6 Light Block - Green 230/240V ac/dc LED Faston Yes - - - -
RS Stock No. 351-3795
Mfr. Part No.9001KA2
TWD880.00
Each
units
Harmony 9001K Contact Block 1NO - - - - - - - - -
RS Stock No. 331-0467
Mfr. Part No.ZB5AZ102
TWD723.00
Each
units
Harmony XB5 Contact Block 1NC - - - Screw Yes 10A - - -
RS Stock No. 610-2815
Mfr. Part No.ZBVB1
TWD283.00
Each
units
Harmony XB Light Block - - 24V LED Screw No - - - -
RS Stock No. 610-2843
Mfr. Part No.ZBVB5
TWD236.00
Each
units
Harmony XB Light Block - - 24V LED Screw No - - - -
RS Stock No. 609-3165
Mfr. Part No.ZB5AZ105
TWD357.00
Each
units
Harmony XB5 Contact Block 1NO 1NC - - - Screw Yes 10A - - -
RS Stock No. 553-999
Mfr. Part No.ZB4BZ1035
TWD1,655.00
Each
units
Harmony XB4 Contact Block 2NO - 600V - Screw Yes 10A - - -
RS Stock No. 610-2938
Mfr. Part No.ZBVM1
TWD653.00
Each
units
Harmony XB Light Block - - 230V LED Screw No - Yes - -
RS Stock No. 330-9732
Mfr. Part No.ZB4BVM6
TWD631.00
Each
units
Harmony XB4 Light Block - - 230 → 240V LED Screw Yes - Yes - -
RS Stock No. 610-2859
Mfr. Part No.ZBVB6
TWD285.00
Each
units
Harmony XB Light Block - - 24V LED Screw No - - - -
RS Stock No. 746-9204
Mfr. Part No.ZB5AW0B61
TWD461.00
Each
units
Harmony XB5 Contact & Light Block 1NO - 24V ac/dc LED Screw Yes 10A Yes - -
RS Stock No. 330-9811
Mfr. Part No.ZB4BW0B31
TWD497.00
Each
units
Harmony XB4 Contact & Light Block 1NO - 24V ac/dc LED Screw Yes 10A Yes - -
RS Stock No. 330-9580
Mfr. Part No.ZB4BVB1
TWD321.00
Each
units
Harmony XB4 Light Block - - 24V LED Screw Yes - Yes - -
RS Stock No. 609-3121
Mfr. Part No.ZB5AW0B31
TWD2,878.00
Each
units
Harmony XB5 Contact & Light Block 1NO - 24V ac/dc LED Screw Yes 10A Yes - -
RS Stock No. 746-8652
Mfr. Part No.ZB5AW0B51
TWD461.00
Each
units
Harmony XB5 Contact & Light Block 1NO - 24V ac/dc LED Screw Yes 10A Yes - -
RS Stock No. 399-3731
Mfr. Part No.216563 & M22-LED230-W
BrandEaton
TWD732.00
Each
units
M22 Light Block - - 85 → 264V ac LED Screw No 15mA Yes - -
RS Stock No. 746-9197
Mfr. Part No.ZB5AW0B11
TWD501.00
Each
units
Harmony XB5 Contact & Light Block - - 24V ac/dc - - - 10A - - -
RS Stock No. 760-4646
Mfr. Part No.115964 & M22-SWD-K11
BrandEaton
TWD977.00
Each
units
M22 Contact Block 1CO - - - - No 15mA - - -
RS Stock No. 411-1362
Mfr. Part No.3SB3400-0C
BrandSiemens
TWD179.00
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No 10A No - -
RS Stock No. 874-2229
Mfr. Part No.3SU1400-1AA10-1CA0
BrandSiemens
TWD219.00
Each
units
SIRIUS ACT Contact Block 1NC - 5 → 500V ac/dc - Screw No 10A No - -