
42
Limit Switch Circuits
This can be accomplished with two 3PDT relays, three momentary
operated pushbutton switches (two with normally open contacts and
one with normally closed contacts), two normally closed limit
switches and a 12 AWG jumper wire in place of a dynamic braking
resistor. L1 and L2 supply power to the relay holding circuitry.
Normally, if the FORWARD, BRAKE and REVERSE pushbuttons
are to be located remotely from the control, low voltage relay coils
are used.
Relay Reversing with Dynamic Braking and Limit
Switches
250-0021r5_readers.qxd 7/11/01 9:18 AM Page 42