TTL modeConnection of TTL encoders with or without zero pulseFig.30: Connection encoder TTL mode with zero pulseConnection instructionsIn TTL mode the inverse inputs are not connected.When using an encoder without zero pulse C, the terminal points for the C track are not connected.Connection of TTL counters / pulse generators with or without zero pulseFig.31: Connection counter / pulse generator TTL mode with zero pulseConnection instructionsIn TTL mode the inverse inputs are not connected.If a counter / pulse generator is connected, the B track determines the counting direction.Input B̅ is not connected.When using a counter / pulse generator without zero pulse C, the terminal points for the C track are not connected.