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. 422-8634
Mfr. Part No.ZB5AW0M55
HK$1,135.69
Each
units
Harmony XB5 Contact & Light Block - - - - - Yes - - - -
RS Stock No. 609-6877
Mfr. Part No.XESD1291
HK$1,487.58
Each
units
XAC Contact Block 2NO 1CO - - - Screw No - No - -
RS Stock No. 342-2908
Mfr. Part No.ZB5AZ103
HK$74.45
Each
units
Harmony XB5 Contact Block 2NO - - - Screw Yes 10A - - -
RS Stock No. 609-6833
Mfr. Part No.XENG1491
HK$402.86
Each
units
XAC, XACA, XACA9 Contact Block - - - - - - - - - -
RS Stock No. 331-0574
Mfr. Part No.ZENL1111
HK$53.45
Each
units
Harmony XAL Contact Block 1NO - - - Screw No 10A - - -
RS Stock No. 422-8612
Mfr. Part No.ZB5AW0M35
HK$1,135.69
Each
units
Harmony XB5 Contact & Light Block - - 230 → 240V ac LED Screw Yes - - - -
RS Stock No. 260-255
Mfr. Part No.33EARL
BrandBACO
HK$87.63
Each
units
BACO Light Block - Red 24V LED Screw No - Yes - -
RS Stock No. 810-3772
Mfr. Part No.216504 & M22-AK10
BrandEaton
HK$72.10
Each
units
M22 Contact Block 1NO - 500V - Screw Yes 4A - - -
RS Stock No. 847-5433
Mfr. Part No.231080 & M22-XLED230-T
BrandEaton
HK$249.02
Each
units
M22 Test Element - - 85 → 264V ac - Screw No - - - -
RS Stock No. 399-3703
Mfr. Part No.216562 & M22-LEDC-G
BrandEaton
HK$198.95
Each
units
M22 Light Block - - 12 → 30V ac/dc LED Screw No 15mA Yes - -
RS Stock No. 553-955
Mfr. Part No.ZB4BZ1045
HK$89.34
Each
units
Harmony XB4 Contact Block 2NC - - - Screw Yes 10A - - -
RS Stock No. 610-2809
Mfr. Part No.ZBE205
HK$88.31
Each
units
Harmony XB Contact Block 1NO 1NC - - - Screw No - - - -
RS Stock No. 399-3674
Mfr. Part No.218057 & M22-LED-B
BrandEaton
HK$87.93
Each
units
M22 Light Block - - 12 → 30V ac/dc LED Screw No 15mA Yes - -
RS Stock No. 826-8677
Mfr. Part No.NSPULSARPRO-R
HK$328.21
Each
units
Pulsar - - - - - - - - - - -
RS Stock No. 553-989
Mfr. Part No.ZBVM45
HK$508.46
Each
units
Harmony XB Light Block - Red 230V LED Screw Clamp No - Yes - -
RS Stock No. 399-3731
Mfr. Part No.216563 & M22-LED230-W
BrandEaton
HK$193.33
Each
units
M22 Light Block - - 85 → 264V ac LED Screw No 15mA Yes - -
RS Stock No. 609-3159
Mfr. Part No.ZB5AZ104
HK$88.12
Each
units
Harmony XB5 Contact Block 2NC - - - Screw Yes 10A - - -
RS Stock No. 610-2966
Mfr. Part No.ZBVM5
HK$176.19
Each
units
Harmony XB Light Block - - 230V LED Screw No - Yes - -
RS Stock No. 746-9099
Mfr. Part No.ZB4BVBG1
HK$719.30
Each
units
Harmony XB4 Light Block - - 24 → 120V LED Screw Yes - Yes - -
RS Stock No. 330-9568
Mfr. Part No.ZB4BV6
HK$55.43
Each
units
Harmony XB4 Light Block - - 250V Incandescent - Yes - No - -
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