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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Part Details Brand Block Type Series Contact Configuration Illumination Colour Voltage Rating Illumination Type Terminal Type Body/Fixing Collar Included Current Rating LED Included
30mm Contact Block 1NC Allen Bradley Contact Block 800T NC - - - - - 10 A -
30mm Contact Block 1NCLB SELFMONITORING Allen Bradley Contact Block 800T NC - - - - - 10 A -
30mm Contact Block 1NCLB+1NC Allen Bradley Contact Block 800T NC - - - - - 10 A -
Allen Bradley 800T Contact Block NO Screw terminal Allen Bradley Contact Block 800T NO - - - Screw - 10 A -
Allen Bradley 800T Contact Block SPDT Screw terminal Allen Bradley Contact Block 800T SPDT - - - Screw - 10 A -
Allen Bradley 800T Contact Block SPDT Screw terminal Allen Bradley Contact Block 800T SPDT - - - Screw - 10 A -
Siemens 3SU1401 Contact & Light Block LED Blue 24 → 240 V ac/dc Cage Clamp terminal Siemens Light Block 3SU1401 - Blue 24 → 240 V ac/dc LED Cage Clamp - 20 mA Yes
Siemens 3SU1401 Contact & Light Block LED Green 230 V ac Screw terminal Siemens Light Block 3SU1401 - Green 230 V ac LED Screw - 20 mA Yes
Siemens 3SU1401 Contact & Light Block LED Green 24 → 240 V ac/dc Cage Clamp terminal Siemens Light Block 3SU1401 - Green 24 → 240 V ac/dc LED Cage Clamp - 20 mA Yes
Siemens 3SU1401 Contact & Light Block LED Red 24 → 240 V ac/dc Cage Clamp terminal Siemens Light Block 3SU1401 - Red 24 → 240 V ac/dc LED Cage Clamp - 20 mA Yes
Siemens 3SU1401 Contact & Light Block LED Yellow 24 → 240 V ac/dc Cage Clamp terminal Siemens Light Block 3SU1401 - Yellow 24 → 240 V ac/dc LED Cage Clamp - 20 mA Yes
Idec HW Series Contact Block 1NO 600 V Fingersafe terminal Idec Contact Block HW Series 1NO - 600 V - Fingersafe No 10 A -
Idec HW Series Contact Block 1NC 600 V Fingersafe terminal Idec Contact Block HW Series 1NC - 600 V - Fingersafe No 10 A -
Idec Light Block Idec - - - - - - - - - -
Schneider Electric Harmony XB5 Light Block SPNO LED Orange 120 → 240 V ac, 125 → 600 V dc Screw terminal Schneider Electric Contact & Light Block Harmony XB5 SPNO Orange 120 → 240 V ac, 125 → 600 V dc LED Screw Yes 0.55 → 1.2 (DC) A, 3 → 6 (AC) A Yes
Schneider Electric Harmony 9001K Light Block SPDT 125 V dc, 240 V ac Screw terminal Schneider Electric Contact Block Harmony 9001K SPDT - 125 V dc, 240 V ac - Screw - 0.55 (dc) A, 3 (ac) A -
Schneider Electric Harmony XB5 Light Block SPNO LED Blue 120 → 240 V ac, 125 → 600 V dc Screw terminal Schneider Electric Contact & Light Block Harmony XB5 SPNO Blue 120 → 240 V ac, 125 → 600 V dc LED Screw Yes 0.55 → 1.2 (DC) A, 3 → 6 (AC) A Yes
Siemens SIRIUS ACT Light Block LED Green 6 → 24 V ac/dc Screw Terminal terminal Siemens Light Block SIRIUS ACT - Green 6 → 24 V ac/dc LED Screw Terminal - 20 mA Yes
Schneider Electric Harmony XB4 Light Block SPDT LED White 110 → 120 V ac Screw terminal Schneider Electric Contact & Light Block Harmony XB4 SPDT White 110 → 120 V ac LED Screw Yes 0.55 → 1.2 (DC) A, 3 → 6 (AC) A Yes
Schneider Electric Harmony XB5 Light Block SPNO LED White 120 → 240 V ac, 125 → 600 V dc Screw terminal Schneider Electric Contact & Light Block Harmony XB5 SPNO White 120 → 240 V ac, 125 → 600 V dc LED Screw Yes 0.55 → 1.2 (DC) A, 3 → 6 (AC) A Yes
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