SB relay - Latching, 4/3 contacts
The SB is a latching safety critical relay with 2 stable magnetically latched states. When 1 coil is energized, the relay actuates from magnetically latched position 1 to 2. When the other coil is energized, the relay actuates back from magnetically latched position 2 to 1.
Two types of configuration are available:
- 400 type contact relays have 4 changeover double break contacts (Form Z)
- 300 type contact relays have 3 changeover double break contacts (Form Z) a 4th double break contact is reserved for automatic coupling of the coils.
The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be disconnected or other hardware removed for relay inspection or replacement). The resistance to impact and vibration is conform to standards in force for Railway Transported Equipment.
Positive mechanical keying of relay to socket is built into relay and socket during manufacture and terminal identifications are clearly marked on identification plate that is permanently attached to the relay.
The SB latching relay allows the memory of the state of the circuit in case of power interruption.
Latching relay using 2 separate coils and magnetic rocker mechanism
Two types available with 4 C/O (type 400) or 3 C/O (type 300) contacts
All contacts are double make - double break contacts (form Z), 8 A
Plug-in design with secure locking feature for maximum ease of maintenance
Optional Weld no transfer contacts • Contact life (mechanical) of 100 million cycles
-40°C...+80 °C operating temperature
Proven reliable in heavy duty application
Long life cycle
Easy to maintain and replace
Low life cycle cost
NF F 62-002 Rolling stock - Instantaneous relays contacts and sockets
NF F 16-101/102 Fire behaviour - Railway rolling stock