IREL
RXTX transmission
R25-TK4/8/16/24 modules — radio transmission of limit-switch states between cranes.

RXTX R25-TK modules
R25-TK4/8/16/24 modules transmit limit-switch states between cooperating cranes over radio.
TK xx STOP variants can also transmit STOP with contact-weld monitoring.
Two modules, separate housings, 4–24 I/O each way; independent channel states.