Page 21-6

Square D > On-line Catalog > Products > Relays and Timers > NEMA Type Industrial Control Relays	Search

NEMA Type Industrial Control Relays

Class 8501-Type X®

DC Control Relays

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.


Normally Open Convertible Instantaneous Contacts	Control Relay
Normally Open Convertible Instantaneous Contacts	Type	Price
0 2 4 6 8	XDO00^d XDO20^d XDO40^d XDO60^d XDO80^d	$171. 209. 248. 285. 323.

DC Timing Relays

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.


Timing Mode	Normally Open Convertible Instantaneous Contacts	Timed Convertible Contacts		Timing Relay		Price
		Timed Convertible Contacts		0.2-60 sec.	5-180 sec.
		N.O.	N.C.	Type	Type
On Delay	0 2 4	1 1 1	1 1 1	XDO00XTE1^d XDO20XTE1^d XDO40XTE1^d	XDO00XTE2^d XDO20XTE2^d XDO40XTE2^d	$437. 476. 513.
Off Delay	0 2 4	1 1 1	1 1 1	XDO00XTD1^d XDO20XTD1^d XDO40XTD1^d	XDO00XTD2^d XDO20XTD2^d XDO40XTD2^d	437. 476. 513.

DC Latching Relays

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	Price
2 4 6 8	XDO20XDL^d XDO40XDL^d XDO60XDL^d XDO80XDL^d	$384. 423. 461. 498.

Caution: Unlatch coil is rated for intermittent duty and should be connected through a N.O. contact of the relay if the input signal is maintained. Order one more N.O. contact than the application requires to use as a coil clearing contact.

DC Utility Relays

Ideal for utility plant applications where reliable performance and a pure DC power plant is required. In addition to the Type XDO relay features, 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° F ambient.


Number of Convertible Contacts		Open Type
N.O.	N.C.	Type	Price
4 0	0 4	XUDO40^d XUDO04^d	$309.
8 0	0 8	XUDO80^d XUDO08^d	404.
12 0	0 12	XUDO1200^d XUDO0012^d	498.

DC Control Relay Utility
Auxiliary Relay


No. of Poles	"A" Dim.		Shipping Weight Lbs.
No. of Poles	IN	mm	Shipping Weight Lbs.
0–4	5.17	131	3.1
6–8	6.37	162	3.4
10–12	7.60	193	3.8

DC Latching Relay


No. of Poles	"A" Dim.		Shipping Weight Lbs.
No. of Poles	IN	mm	Shipping Weight Lbs.
2–4	7.76	197	3.9
6–8	8.98	228	4.2

Average Operating Times In Milliseconds
Device	Pick-Up	Drop-Out
DC Relay	37	21
DC Latching Relay	37	45

DC Contact Ratings (for AC ratings, see page 21-5)
Type of Cartridge	DC Ratings
	Volts	Inductive			Resistive
		NEMA Rating	Make and Break Amperes 138VA Max.	Contin- uous Amperes	Make and Break A	Contin- uous Amperes
		NEMA Rating	Make and Break Amperes 138VA Max.	Contin- uous Amperes	Make and Break A	Contin- uous Amperes
Standard	125 250	P600	1.1 0.55	5 5	4 0.8	5 5
Overlapping	125	P150	1.1	5	4	5
Logic Reed	. . .	. . .	30 Vdc, 60 ma

^aDo not use any 8501 Type XC4 Master Cartridges on any DC-operated device.

DC Timing Relay

Voltage Codes for 8501 XUDO Relays ONLY:
DC Voltages	Code
6 12 24 48 125 250	V50 V51 V53 V56 V63 V67

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

For Replacement coils page 21-7

For additional information, reference Catalog #8501CT9601.


CP1		Discount Schedule

8/4/04

Square D US
Telemecanique US
Merlin Gerin US