These are also called continuous contacs did this article help you to solve your problem.
Make before break relay allen bradley.
Bulletin 700 ps solid state timing relays are accurate solid state timers that can be mounted on 4 pole bulletin 700 p pk r or rm relays and on 2 pole bulletin 700 ph relays.
Our msr100 single function safety relays support a wide variety of input devices and output configurations.
Relays of this type have contacts that are mechanically connected together such that if a normally open no or make contact remains closed a normally closed nc or break contact can not re close.
Allen bradley relays and timers are part of rockwell automation s essential components line.
Allen bradley relays and timers off er compatible and versatile solutions for control applications from programmable controllers and motor starters to push buttons and terminal blocks.
This is outlined in ansi b11 19 and en.
Using an adapter plate you can also mount it for standalone use.
Relays with mbb contacts have an overlapping mechanism where the no contacts close before the nc contacts open.
Mbb contacts is an abbreviation for make before break contacts.
Additionally if a nc contact fails to open upon energizing the relay the no contacts shall not close.