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. 330-9704
Mfr. Part No.ZB4BVM3
PHP1,265.07
Each
units
Harmony XB4 Light Block - Green 230 → 240 V LED Screw Yes - Yes - -
RS Stock No. 260-104
Mfr. Part No.33E10
BrandBACO
PHP252.252
Each (In a Pack of 5)
units
BACO Contact Block 1NO - 600 V - Screw No 10 A - - -
RS Stock No. 610-2792
Mfr. Part No.ZBE204
PHP861.46
Each
units
Harmony XB Contact Block 2NC - - - Screw No - - - -
RS Stock No. 610-2916
Mfr. Part No.ZBVG4
PHP728.42
Each
units
Harmony XB Light Block - Red - LED Screw No - - - -
RS Stock No. 330-9546
Mfr. Part No.ZB4BV4
PHP1,754.35
Each
units
Harmony XB4 Light Block - - - Incandescent BA 9s Base Fitting Yes - No - -
RS Stock No. 553-995
Mfr. Part No.ZB4BZ1015
PHP357.94
Each
units
Harmony XB4 Contact Block 1NO - - - Cage Clamp Yes - - - -
RS Stock No. 399-3731
Mfr. Part No.M22-LED230-W
BrandEaton
PHP711.43
Each
units
M22 Light Block - White 230 V LED Screw No 15 mA Yes - -
RS Stock No. 399-3646
Mfr. Part No.M22-LED-R
BrandEaton
PHP477.25
Each
units
M22 Light Block - Red 24 V LED Screw No 15 mA Yes - -
RS Stock No. 331-0423
Mfr. Part No.ZB5AVM4
PHP1,045.38
Each
units
Harmony XB5 Light Block - Red 230 → 240 V ac LED Screw Yes - Yes - -
RS Stock No. 330-9530
Mfr. Part No.ZB4BV3
PHP1,754.35
Each
units
Harmony XB4 Light Block - - - Incandescent BA 9s Base Fitting Yes - No - -
RS Stock No. 742-9540
Mfr. Part No.3SB3423-0B
BrandSiemens
PHP336.72
Each
units
Siemens 3SB3 Contact Block 1NO - - - Cage Clamp No - - - -
RS Stock No. 331-0439
Mfr. Part No.ZB5AVM5
PHP995.86
Each
units
Harmony XB5 Light Block - Yellow 230 → 240 V ac LED Screw Yes - Yes - -
RS Stock No. 746-0816
Mfr. Part No.3SB1400-0J
BrandSiemens
PHP1,060.14
Each
units
Siemens 3SB3 Contact Block 2NO - - - Screw No 10 A - - -
RS Stock No. 342-2908
Mfr. Part No.ZB5AZ103
PHP547.45
Each
units
Harmony XB5 Contact Block 2NO - - - Screw Yes 10 A - - -
RS Stock No. 610-2900
Mfr. Part No.ZBVG3
PHP733.21
Each
units
Harmony XB Light Block - Green 110 → 120 V LED Screw No - - - -
RS Stock No. 331-0568
Mfr. Part No.ZALVM4
PHP1,302.74
Each
units
Harmony ZALV Light Block - Red 230 → 240 V ac LED Screw No - Yes - -
RS Stock No. 742-9439
Mfr. Part No.3SB3420-0CA
BrandSiemens
PHP903.07
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No - - - -
RS Stock No. 331-0401
Mfr. Part No.ZB5AVB5
PHP519.15
Each
units
Harmony XB5 Light Block - Yellow 24 V ac/dc LED Screw Yes - Yes - -
RS Stock No. 610-2809
Mfr. Part No.ZBE205
PHP592.96
Each
units
Harmony XB Contact Block 1NO 1NC - - - Screw No - - - -
RS Stock No. 331-0467
Mfr. Part No.ZB5AZ102
PHP319.51
Each
units
Harmony XB5 Contact Block 1NC - - - Screw Yes 10 A - - -
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