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. 330-9732
Mfr. Part No.ZB4BVM6
TWD631.00
Each
units
Harmony XB4 Light Block - - 230 → 240V LED Screw Yes - Yes - -
RS Stock No. 553-898
Mfr. Part No.ZBVM15
TWD691.00
Each
units
Harmony XB Light Block - White 230V LED Screw Clamp No - Yes - -
RS Stock No. 610-2843
Mfr. Part No.ZBVB5
TWD236.00
Each
units
Harmony XB Light Block - - 24V LED Screw No - - - -
RS Stock No. 330-9653
Mfr. Part No.ZB4BVG3
TWD2,004.00
Each
units
Harmony XB4 Light Block - - 110 → 120V LED Screw Yes - 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 - -
New
RS Stock No. 211-8577
Mfr. Part No.ZB5AVBG6
TWD2,851.00
Each
units
ZB5 Light Block - Blue 120V LED Screw Clamp - - - - -
RS Stock No. 399-3630
Mfr. Part No.216557 & M22-LED-W
BrandEaton
TWD800.00
Each
units
RMQ Titan Light Block - - 12 →30V ac/dc LED Screw No 15mA Yes - -
RS Stock No. 813-5268
Mfr. Part No.YW-E01
BrandIdec
TWD114.00
Each
units
CW Series Contact Block 1NC - - - - No 10A - - -
RS Stock No. 193-2307
Mfr. Part No.3SU1401-2BF60-3AA0
BrandSiemens
TWD705.00
Each
units
SIRIUS ACT - - - 230V ac LED - - 20mA Yes - -
RS Stock No. 553-945
Mfr. Part No.ZB5AZ1045
TWD1,578.00
Each
units
Harmony XB5 Contact Block 2NC - - - Screw Clamp Yes 10A - - -
RS Stock No. 193-4848
Mfr. Part No.3SU1401-2BC40-1AA0
BrandSiemens
TWD685.00
Each
units
SIRIUS ACT - - - 110V ac LED Screw - 20mA Yes - -
RS Stock No. 193-2369
Mfr. Part No.3SU1501-1AG00-1LA0
BrandSiemens
TWD918.00
Each
units
SIRIUS ACT Contact Block - - 6 ... 24V LED Screw - - Yes - -
New
RS Stock No. 210-0776
Mfr. Part No.45-320.1H11
BrandEAO
TWD524.00
Each
units
45 Light Block - Green 6 → 24V ac/dc LED Screw - - - - -
RS Stock No. 330-9934
Mfr. Part No.ZB4BW0M11
TWD969.00
Each
units
Harmony XB4 Contact & Light Block 2NO - 230 → 240V ac LED Screw Yes 10A Yes - -
RS Stock No. 193-2308
Mfr. Part No.3SU1401-2BH40-1AA0
BrandSiemens
TWD814.00
Each
units
SIRIUS ACT - - - - LED Screw - 20mA Yes - -
New
RS Stock No. 211-8578
Mfr. Part No.ZB5AW0B43
TWD769.00
Each
units
ZB5 Light Block SPDT Red 24V LED Screw Clamp - - - - -
RS Stock No. 330-9603
Mfr. Part No.ZB4BVB4
TWD302.00
Each
units
Harmony XB4 Light Block - - 24V LED Screw Yes - Yes - -
RS Stock No. 874-2291
Mfr. Part No.3SU1550-1AA10-1CA0
BrandSiemens
TWD329.00
Each
units
SIRIUS ACT Contact Block 1NC - 5 → 500V ac/dc - Screw Yes 6A No - -
RS Stock No. 180-9514
Mfr. Part No.3SU1401-1BG20-1AA0
BrandSiemens
TWD292.00
Each
units
3SU1 Light Block - - 6 → 24V ac/dc LED Screw - 20mA Yes - -
RS Stock No. 553-973
Mfr. Part No.ZBE1015
TWD181.00
Each
units
Harmony XB Contact Block 1NO - - - Screw Clamp No - - - -