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. 342-2683
Mfr. Part No.ZB4BW0G51
TWD3,651.00
Each
units
Harmony XB4 Contact & Light Block 1NO - 110 → 120V ac LED Screw Yes 10A Yes - -
RS Stock No. 173-6826
Mfr. Part No.3SU1400-2CK10-1AA0
BrandSiemens
TWD321.00
Each
units
SIRIUS ACT Light Block - - 240V ac/dc - Screw - - - - -
RS Stock No. 203-8682
Mfr. Part No.3SU1401-1BF24-3AA0
BrandSiemens
TWD1,671.00
Each
units
3SU Light Block - - 230V LED - - - - - -
New
RS Stock No. 210-0775
Mfr. Part No.45-320.1E42
BrandEAO
TWD1,000.00
Each
units
45 Light Block - Red 24 → 240V ac/dc LED - - - - - -
RS Stock No. 193-2664
Mfr. Part No.3SU1501-1AG60-1FA0
BrandSiemens
TWD640.00
Each
units
SIRIUS ACT Contact Block - - 6 ... 24V LED Screw - - Yes - -
New
RS Stock No. 211-8598
Mfr. Part No.ZBV18B3
TWD3,050.60
Each (In a Pack of 5)
units
ZBV - - Green 24V LED Screw Clamp - - - - -
New
RS Stock No. 211-6722
Mfr. Part No.8LM2TC01
BrandLovato
TWD1,397.00
1 Box of 10
Box(es)
8LM2T Auxiliary Contact Block 1NC - 690V - Screw - - - - -
RS Stock No. 810-3781
Mfr. Part No.216505 & M22-AK11
BrandEaton
TWD470.00
Each
units
M22 Contact Block 1NO 1NC - 500V - Screw Yes 4A - - -
RS Stock No. 173-6833
Mfr. Part No.3SU1401-1BG60-1AA0
BrandSiemens
TWD292.00
Each
units
SIRIUS ACT Light Block - - 24V ac/dc LED Screw - 20mA - - -
RS Stock No. 193-3857
Mfr. Part No.3SU1550-1AA10-3NA0
BrandSiemens
TWD681.00
Each
units
SIRIUS ACT Contact Block - - 5 ... 500V - - - - - - -
New
RS Stock No. 220-5237
Mfr. Part No.XESB2011
TWD589.00
Each
units
XEN - 1 NC + 1 NO - 500V - Screw - - - - -
RS Stock No. 399-3769
Mfr. Part No.218059 & M22-LED230-B
BrandEaton
TWD749.00
Each
units
M22 Light Block - - 85 → 264V ac LED Screw No 15mA Yes - -
RS Stock No. 342-0491
Mfr. Part No.ZB6Z5B
TWD541.00
Each
units
Harmony XB6 Contact Block 1NO 1NC - - - Faston Yes - - - -
RS Stock No. 610-2786
Mfr. Part No.ZBE203
TWD436.00
Each
units
Harmony XB Contact Block 2NO - - - Screw No - - - -
RS Stock No. 193-4791
Mfr. Part No.3SU1401-2BB20-3AA2
BrandSiemens
TWD1,010.00
Each
units
SIRIUS ACT - - Red - LED - - 20mA Yes - -
RS Stock No. 422-8628
Mfr. Part No.ZB5AW0M45
TWD4,501.00
Each
units
Harmony XB5 Contact & Light Block - Red - - - Yes - - - -
RS Stock No. 757-8932
Mfr. Part No.1SFA611610R1010 MCB-01
BrandABB
TWD292.00
Each
units
ABB Modular Contact Block 1NC - - - - No - - - -
RS Stock No. 874-2165
Mfr. Part No.3SU1400-2AA10-3BA0
BrandSiemens
TWD205.00
Each
units
SIRIUS ACT Contact Block 1NO - 5 → 500V ac/dc - - No 10A No - -
RS Stock No. 193-5203
Mfr. Part No.3SU1501-1AG30-1FA0
BrandSiemens
TWD794.00
Each
units
SIRIUS ACT Contact Block - - 6 ... 24V LED Screw - - Yes - -
RS Stock No. 349-1550
Mfr. Part No.ZB6EB4B
TWD314.00
Each
units
Harmony XB6 Light Block - - 30V ac/dc LED - Yes 15mA - - -