Table 23.115: Type X
Mechanical Latch Attachment—Mounts on any 2 through 8-pole relay (except XMO master relay). The Type XL and XDL latch
attachments are identical in size and mounting provisions. The Type XLAC latch attachment has a continuous-duty-rated coil which is
replaceable. The Type XDLDC latch attachment has an intermittent–rated coil (replaceable) and should be connected
through a N.O. contact of the basic relay if the input signal is maintained to the unlatch coil.
AC Latch Attachment
DC Latch Attachment
Pneumatic Timer Attachment—Mounts only on any 0 through 4-pole AC or DC relays (except XMO master relay). It provides 1
N.O. and 1 N.C. convertible timed contacts, which are the same Type XC1 cartridges used on the basic relay. Two timing ranges are
available, and conversion from On Delay to Off Delay or vice versa is easy.
Timer Lockout Cover—Fits over the time delay adjustment knob of any Type XT timing attachment. The Lockout Cover is designed
to protect the time setting against accidental adjustment. It mounts directly to the timing attachment with two included screws.
Adder Decks—Adder decks are used to expand the number of poles on a relay. The basic 4-pole relay can be easily converted to an
8-pole or 12-pole relay by installing one or two adder decks. The Class 8501 Type XB20 comes with 2 convertible contact cartridges
and will accept 2 additional convertible contact cartridges. The Class 8501 Type XB40 comes with 4 convertible contact cartridges.
The same Type XB adder deck is used for both the middle and upper decks of the AC or DC relay.
With 2 N.O. contact cartridges
With 4 N.O. contact cartridges
Logic Reed Adder Deck—Used for switching low energy circuits. The
Logic Reed Adder Deck is supplied with either one or two logic reed
cartridges fixed into the center positions of an adder deck. Contact
cartridges are neither convertible nor replaceable. Standard cartridges can
be inserted in unused cavities of the Logic Reed Adder Deck. One or two
Logic Reed Adder Decks may be added to the basic 4-pole relay. See
Contact Rating Data on pages 23-40 and 23-2 for electrical ratings.
Contact Cartridges—The Type X relay offers 4 Types of contact cartridges. All are color–coded for visual identification of each Type.
Standard Cartridge—The standard cartridge, used for most applications, has a black case.
Overlapping Cartridge—Same NEMA Type A600 AC rating as standard cartridge and a NEMA Type P150 DC rating. When it is
used in the N.O. mode it will close early and when used in the N.C. mode it will open late. If two or more are used together, the N.O.
contacts will close before the N.C. contacts open as the relay picks up. Overlap also occurs during dropout. Overlapping cartridge
has a red case.
May be ordered factory installed:
Substitute 1 N.O. and 1 N.C. overlapping cartridges for 2 standard cartridges.
Substitute 2 N.O. and 2 N.C. overlapping cartridges for 4 standard cartridges.
Substitute 3 N.O. and 3 N.C. overlapping cartridges for 6 standard cartridges.
Substitute 4 N.O. and 4 N.C. overlapping cartridges for 8 standard cartridges.
Master Cartridge—Features the same contact ratings as the Type XC1 standard cartridge except it has a 20 ampere continuous
current rating instead of 10 amperes. It can be used in circuits where a master relay is required. Master cartridge has a blue case.
Maximum of 6 master cartridges may be used on any 7 and 8-pole AC relays. Do not use any master cartridges on 9-12-pole
AC or any DC-operated devices. Note: If master cartridges are added to a standard relay, attachments (latch mechanism,
timers, etc.) cannot be used.
Logic Reed Cartridge—See logic reed adder deck above.
Mounting Track—The mounting track has pre-punched mounting holes to simplify mounting the track on the control panel. The relay
mounting screws are factory installed on the track so that the relays can be hung prior to tightening the screws.
9 in. long for 4 relays
18 in. long for 8 relays
27 in. long for 12 relays
36 in. long for 16 relays
Manual Test Tool—Provides a means of manually switching the contacts of a basic relay or timing relay and holding all contacts in
their switched state until the tool is removed. This simplifies the checking of control circuits without power on the coil or contacts.
Transient Suppressor—Consists of an R-C circuit designed to suppress coil generated transients to approximately 200 percent of
peak voltage. It is particularly useful when switching the Type X relay near solid state equipment. It is designed for use on coils up to
NEMA 1 Enclosure—Formed from sheet steel to provide strength and rigidity. Two conduit knockouts are located in both the top and
bottom of the enclosure. The enclosure is furnished with self tapping screws for mounting the relay inside the enclosure.
Accommodates a single 4 or 8-pole AC or DC relay, 12-pole AC relay, 4-pole AC latching relay, and 4-pole AC timing relay.
Note: The 4-pole DC latching relay, 4-pole DC timing relay, 8-pole AC and DC latching relays and 12-pole utility auxiliary relay will not fit.
See Mechanical Latch Attachment Voltage Codes table below:
Table 23.116: Mechanical Latch Attachment Voltage Codes
Table 23.118: Relay Coil Selection and Pricing
Equipment To Be Serviced Coil Prefix,
Equipment To Be Serviced
9998 X b
To order an unlatch coil add the letter “L” to the type number and the letter “B” to the suffix number. Example: for a 120 V 60 Hz unlatch coil order a Class 9998 Type XL44B.
Not dual rated—250 Vdc only
125 Vdc only
© 2009 Schneider Electric
All Rights Reserved
Number of N.O. Logic Reed Number of N.C. Logic Reed
Table 23.117: How to Order
To Order Specify:
Voltage Code for mechanical latch attachment
Form for factory installed overlapping contacts
(The complete coil number consists of prefix or the Class and Type, followed by suffix.)
240 V 277 V 380 V 440 V 480 V
Class 8501 / Refer to Catalog 8501CT9601
110 V 115/125 V 220 V 230/250 V