NEMA Type Industrial Control Relays
Class 8501-Type X®
Class 8501 Type X relays combine a rugged, heavy-duty design with modular construction for greater flexibility. They are ideal for those applications where long life, high reliability and ease of maintenance are important. The Type X family offers a complete line of relays and accessories for all control applications.
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Modular design provides greater versatility and reduction in stock
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XUDO version ideal for power plant applications
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Replaceable, convertible contacts
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Extremely reliable contacts
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Suitable for use in safety circuits (Category 4)
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600 volt 10 ampere rating (NEMA rated A600 and P600)
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Plug-in color-coded contact cartridges
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Mechanical tie between contact cartridges
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1 and 3 minute timing relays
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8 pole latching relays
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DC operated relays
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Modular Construction
A basic relay has room for up to 4 convertible contact cartridges. It can be expanded to 6 or 8 poles by installing an adder deck. A 10 or 12 pole relay can be built by adding a second deck. The same adder deck is used for both the middle and upper decks. Latching and timing relays are made by adding a latch or timer attachment to a basic relay. This reduces the number of components required in inventory.
Common Mechanical Tie
Non-Overlapping Contacts
The Type X relay is designed to provide a significant degree of non-overlap between N.O. and N.C. contacts during normal operation. In addition, a common mechanical tie between all contact cartridges is provided. Therefore, the
Type X relay is suitable for use in self-checking circuits for press control and automatic transfer line applications. (This design specification complies with the IEC definition for positive-guided contacts.) Since the T-bar actuator is held captive in the cover plate, there is no chance of losing or forgetting to replace the mechanical tie when converting a contact or adding another deck.
Plug-In Contact Cartridges
Contact conversion without removing terminal screws or wires
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Remove relay cover and captive T-bar actuator.
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Remove contact cartridge and rotate 180°.
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Plug contact cartridge back in.
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Replace T-bar actuator and cover.
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Ring or Spade Lugs—Form Y414
For relays with terminals that will accept ring or spade lugs, add
Form Y414 to the Class and Type number of the device being ordered. Form Y414 is available on all AC relays, DC relays and attachments at no additional charge. Use only UL Listed/CSA certified insulated barrel ring-tongue lugs with a ring diameter of 0.344" or less designed for a # 6 screw. Do not use unlugged stripped wire. Lugs should accept #12–#14 AWG stranded copper wire.
Normally Closed Contacts
Contact conversion is so simple that it is generally more economical to purchase relays with all contacts N.O. and convert contacts to N.C. as required. If it is preferred that relays be factory assembled with a combination of N.O. and N.C. contacts, change the type number so that the first number after the "XO" indicates the number of normally open contacts and the second number indicates the number of normally closed contacts. Also, add $19.10 to the price shown in the tables on pages 21-5 and 21-6 for a relay having the same total number of contacts. Example: a relay with 1 N.O. and 2 N.C. poles would be identified as a Type XO12 and priced at $152.00.
Approvals:
For additional information, reference Catalog #8501CT9601.
