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
RS Stock No. 331-0473
Mfr. Part No.ZBE101
$16.80
Each
units
Harmony XB Contact Block 1NO - - - Screw No 10 A → 600 V ac No
RS Stock No. 331-0489
Mfr. Part No.ZBE102
$16.80
Each
units
Harmony XB Contact Block 1NC - 600 V ac - Screw No 10 A No
RS Stock No. 331-0158
Mfr. Part No.ZB4BZ101
$25.90
Each
units
Harmony XB4 Contact Block 1NO - 600 V - Screw Yes 10 A -
RS Stock No. 331-0574
Mfr. Part No.ZENL1111
$19.80
Each
units
Harmony XAL Contact Block 1NO - - - Screw No 10 A -
RS Stock No. 815-1676
Mfr. Part No.ZB2BE101
$17.25
Each
units
XB2 Contact Block 1NO - 600 V - Screw - 10 A -
RS Stock No. 331-0580
Mfr. Part No.ZENL1121
$19.80
Each
units
Harmony XAL Contact Block 1NC - - - Screw No - -
RS Stock No. 331-0164
Mfr. Part No.ZB4BZ102
$25.90
Each
units
Harmony XB4 Contact Block 1NC - 600 V - Screw Yes - -
RS Stock No. 610-2944
Mfr. Part No.ZBVM3
$47.60
Each
units
Harmony XB Light Block - Green 230 V LED Screw No - Yes
RS Stock No. 610-2821
Mfr. Part No.ZBVB3
$26.90
Each
units
Harmony XB Light Block - Green 24 V LED Screw No - -
RS Stock No. 610-2837
Mfr. Part No.ZBVB4
$26.90
Each
units
Harmony XB Light Block - Red 24 V LED Screw No - -
RS Stock No. 331-0192
Mfr. Part No.ZB4BZ105
$42.40
Each
units
Harmony XB4 Contact Block 1NO 1NC - - - Screw Yes 10 A -
RS Stock No. 815-1670
Mfr. Part No.ZB2BE102
$13.15
Each
units
XB2 Contact Block 1NC - 600 V - Screw - 10 A -
RS Stock No. 610-2815
Mfr. Part No.ZBVB1
$26.90
Each
units
Harmony XB Light Block - White 24 V LED Screw No - -
RS Stock No. 609-6827
Mfr. Part No.XENG1191
$99.90
Each
units
XENG Contact Block 1 NC, 2NO - - - - - 10 A -
RS Stock No. 610-2859
Mfr. Part No.ZBVB6
$26.90
Each
units
Harmony XB Light Block - Blue 24 V LED Screw No - -
RS Stock No. 330-9811
Mfr. Part No.ZB4BW0B31
$52.40
Each
units
Harmony XB4 Contact & Light Block 1NO Green 24 V ac/dc LED Screw Yes 10 A Yes
RS Stock No. 331-0186
Mfr. Part No.ZB4BZ103
$42.40
Each
units
Harmony XB4 Contact Block 2NO - 600 V - Screw Yes 10 A -
RS Stock No. 331-0445
Mfr. Part No.ZB5AZ101
$21.30
Each
units
Harmony XB5 Contact Block 1NO - - - Screw Yes - -
RS Stock No. 331-0467
Mfr. Part No.ZB5AZ102
$21.30
Each
units
Harmony XB5 Contact Block 1NC - - - Screw Yes 10 A -
RS Stock No. 610-2843
Mfr. Part No.ZBVB5
$26.90
Each
units
Harmony XB Light Block - Yellow 24 V LED Screw No - -