Pub 50770
ECR PB#10595
Pub 50770
REV B
10250T/91000T Series D Contact Blocks with
Early Closing and/or Late Opening Contacts
Contact block circuits are identified by the symbols and nomenclature shown below and are
laser engraved on all contact blocks.
10250T/91000T catalog numbers followed by suffix “E” have logic level contacts.
These contact blocks have reduced operating strokes. Do not use with pushbutton type
padlock attachments, 3 - position push-pull operators, 4 - position selector switches
roto-push operators, or selector switch cam codes 6, 7, and 8.
Pub 50770
Effective 4/06
The N.O. (Early Closing)
contact closes before the
N.C. (Late Opening)
contact opens.
LATE
OPENING
10250T55 & T56
91000T55 & T56
1 N.C. - 1 N.O.
EARLY
CLOSING
The N.O. (Early Closing)
contact closes before the
(Standard) N.O. contact
closes.
EARLY
CLOSING
10250T57 & T58
91000T57 & T58
2 N.O.
STANDARD
N.O.
The N.O. (Early Closing)
contact closes before the
(Standard) N.C. contact
opens.
STANDARD
N.C.
10250T47
91000T47
1 N.C. - 1 N.O.
EARLY
CLOSING
The N.C. Contacts
are Late Opening
contacts.
LATE
OPENING
10250T45
91000T45
2 N.C.
LATE
OPENING
The N.C. Contact
is a Late Opening
contact.
10250T71
91000T71
1 N.C.
LATE
OPENING
