General Information

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.

Speciﬁed In Major Automotive Plants
Modular Design Provides Greater Versatility and Reduction In Stock
XUDO Version Ideal for Power Plant Applications
Replaceable, Convertible Contacts
Extremely Reliable Contacts
600 Volt 10 Ampere Rating (NEMA Type A600)
Plug-In Color-Coded Contact Cartridges
Mechanical Tie Between Contact Cartridges
1 and 3 Minute Timing Relays
8 Pole Latching Relays
DC Operated Relays

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. 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

Remove relay cover and captive T-bar actuator.
Remove contact cartridge and rotate 180˚.
Plug contact cartridge back in.
Replace T-bar actuator and cover.

NOTE: For additional information regarding contact cartridges see Product Data.

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. Ring or spade lugs must have an outside diameter of .31 inch or less and an inside diameter large enough to accommodate a #6 screw. Lugs should accept #12 – #14 gauge (AWG) stranded copper wire. UL Listing is maintained only when AMP Plasti-Grip^® #32958 insulated-barrel ring-tongue lugs are used.

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 following the “XO”, the ﬁrst number indicates the number of normally open contacts (N.O.) and the second number indicates the number of normally closed contacts (N.C.). As indicated on contact arrangement tables found on Page 6.

There is a price adder for the factory installation of normally closed (N.C.) contacts.

How to Order:

To Order Specify:	Catalog Number
Class Number Type Number Voltage Code Form(s)		Class	Type	Voltage Code	Form(s)
		8501	XO40	V02	Y414

Order Information

AC Control Relays

Type XO40

In addition to all of the features listed in General Information, the Type XO relay also provides:

Straight-through wiring
Plug-in contact cartridges for easy contact conversion and replacement
Contact conversion without removing terminal screws or wires
Self-lifting pressure wire connectors that will accept up to two #12-18 (AWG) gauge stranded copper wires
Replaceable coil

Normally Open Convertible Instantaneous Contacts	Control Relay**
Normally Open Convertible Instantaneous Contacts	Type
0	XO00
2	XO20
3	XO30
4	XO40
6	XO60
8	XO80
10	XO1000
12	XO1200

File
CCN

E78403
NKCR

File
Class

LR 60905
3211 03

AC Master Relays

Type XMO40

20 Ampere Contact Rating due to use of Master Contact Cartridges
Provisions for Standard Cartridges to be used in contact cavities not oc-cupied by Master Cartridges in 2-8 pole AC relay
Straight-through wiring
Plug-in contact cartridges for easy contact conversion and replacement
Contact conversion without removing terminal screws or wires
Self-lifting pressure wire connectors that will accept up to two #12–18 (AWG) gauge stranded copper wires
Replaceable coil

Number of N.O. 20 Ampere Convertible Contacts	Open Type**
Number of N.O. 20 Ampere Convertible Contacts	Type
2	XMO20
4	XMO40
6	XMO60

File
CCN

E78403
NKCR

File
Class

LR 60905
3211 03

How to Order:

How to Order:

To Order Specify:	Catalog Number
Class Number Type Number Voltage Code		Class	Type	Voltage Code
		8501	XO40	V02

AC Timing Relays

Type XO40XTE1

Easily convertible On Delay or Off Delay
Two adjustable timing ranges
Repeat accuracy well above ±10%
Convertible 1 N.O. and 1 N.C. timed contacts
Large knob for easy adjustment of time delay
Off Delay mode times out even after loss of power

File
CCN

E78403
NKCR

File
Class

LR 60905
3211 03

Timing Mode	Normally Open Convertible Instantaneous Contacts	Timed Convertible Contacts		Timing Relay
		Timed Convertible Contacts		0.2–60 sec.	5–180 sec.
		N.O.	N.C.	Type*	Type*
On Delay	0	1	1	XO00XTE1	XO00TE2
	2	1	1	XO20XTE1	XO20TE2
	4	1	1	XO40XTE1	XO40TE2
Off Delay	0	1	1	XO00XTD1	XO00TD2
	2	1	1	XO20XTD1	XO20TD2
	4	1	1	XO40XTD1	XO40TD2

AC Latching Relays

Type XO40XL

Mechanical Latch holds all contacts switched even after removal of power from replaceable Latching Coil.
Provides sequence memory in the event of power loss. Ideal for press control, process control and punch presses.
Replaceable Unlatch Coil to switch contacts back to original state.
Continuously rated Unlatch Coil (no coil clearing contacts required).

Normally Open Convertible Instantaneous Contacts	Control Relay*
Normally Open Convertible Instantaneous Contacts	Type*
2	XO20XL
3	XO30XL
4	XO40XL
6	XO60XL
8	XO80XL

File
CCN

E78403
NKCR

File
Class

LR 60905
3211 03

Voltage Codes

AC Voltages-Hz	Code
12–60	V11
24–60	V01
24–50	V12
48–60	V18
48–50	V16
120–60 / 110–50	V02
208–60	V08
240–60 / 220–50	V03
277–60	V04
480–60 / 440–50	V06
600–60 / 550–50	V07

DC Control Relays

Type XDO40

Replaceable, highly reliable pure DC Power Plant: no economizing resistors, overlapping contacts or dual-wound coil
Utilizes the same Type XB Adder Decks and attachments as the AC Version
Offers all the features of the AC Relay
Available in up to 8 Poles
All contact poles are usable since no overlapping contacts are needed
Self-lifting pressure wire connectors that will accept up to two #12-18 (AWG) gauge stranded copper wires

Normally Open Convertible Instantaneous Contacts	Control Relay
Normally Open Convertible Instantaneous Contacts	Type*
0	XDO00
2	XDO20
4	XDO40
6	XDO60
8	XDO80

File
CCN

E78403
NKCR

File
Class

LR 60905
3211 03

DC Timing Relays

Type XDO40XTE2

Easily convertible On Delay or Off Delay
Two adjustable timing ranges
Repeat accuracy well above ±10%
Convertible 1 N.O. and 1 N.C. timed contacts
Large knob for easy adjustment of time delay
Off Delay mode times out even after loss of power

File
CCN

E78403
NKCR

File
Class

LR 60905
3211 03

Timing Mode	Normally Open Convertible Instantaneous Contacts	Timed Convertible Contacts		Timing Relay
		Timed Convertible Contacts		0.2–60 sec.	5–180 sec.
		N.O.	N.C.	Type*	Type*
On Delay	0	1	1	XDO00XTE1	XDO00TE2
	2	1	1	XDO20XTE1	XDO20TE2
	4	1	1	XDO40XTE1	XDO40TE2
Off Delay	0	1	1	XDO00XTD1	XDO00TD2
	2	1	1	XDO20XTD1	XDO20TD2
	4	1	1	XDO40XTD1	XDO40TD2

Voltage Codes for 8501 XUDO Relays ONLY:		Voltage Codes for 8501 XDO Relays
DC Voltages	Code	DC Voltages	Code
6	V50	6	V50
12	V51	12	V51
24	V53	24	V53
48	V56	32	V54
125	V63	48	V56
250	V67	72	V58
		90	V59
		115 / 125	V62
		230 / 250	V66

DC Latching Relays

Type XDO40XDL

Mechanical Latch holds all contacts switched even after removal of power from replaceable Latching Coil
Provides sequence memory in the event of power loss
Ideal for sequencing applications such as press control, process control and punch presses
Replaceable Unlatch coil to switch contacts back to original state

Normally Open Convertible Instantaneous Contacts	Latching Relay*
Normally Open Convertible Instantaneous Contacts	Type*
2	XDO20XDL
4	XDO40XDL
6	XDO60XDL
8	XDO80XDL

File
CCN

E78403
NKCR

File
Class

LR 60905
3211 03

DC Utility Relays

Ideal for utility plant applications where reliable performance and a pure DC power plant are required. In addition to the Type XDO relay fea-tures, the Type XUDO provides:

Up to 12 poles N.O. or N.C.
Nominal 125 Vdc coil, capable of handling 140 Vdc continuously and picking up at 105 Vdc after having been operated at 140 Vdc continuously. Other voltages with comparable operating characteristics are available
Enclosed device capable of operating in 145°

Number of Convertible Contacts		Open Type
N.O.	N.C.	Type*
4	0	XUDO40
0	4	XUDO04
8	0	XUDO80
0	8	XUDO08
12	0	XUDO1200
0	12	XUDO0012

File
CCN

E78403
NKCR

File
Class

LR 60905
3211 03

For Replacement Coils see Replacement AC Magnet Coils For Relays or Replacement DC Magnet Coils For Relays.

How to Order:

To Order Specify:	Catalog Number
Class Number Type Number Voltage Code		Class	Type	Voltage Code
		8501	XDO40	V53