Hardware manual

LT-4201TM/4301TM Hardware Manual

The figure shows the labels on each terminal block:

NOTE: Appearance of the

connectors are the same but are different. Check the

label and pin position of each connector before connecting.

Protecting Outputs from Inductive Load Damage

Depending on the load, a protection circuit may

be needed for the outputs on the

controllers and certain modules. Inductive loads using DC voltages may create

voltage reflections resulting in overshoot that will damage or shorten the life of

output devices

Protective circuit A: this protection circuit can

be used for DC load power circuits and

source outputs (positive logic).

Protective circuit A: this protection circuit can

be used for DC load power circuits and

sink outputs (negative logic).

z C represents a value from 0.1 to 1 µF.

z R represents a resistor of approximately the same resistance value as the load.

CAUTION

OUTPUT CIRCUIT DAMAGE DUE TO INDUCTIVE LOADS

Use an appropriate external protective circui

t or device to reduce the risk of

inductive direct current load damage.

Failure to follow these instructions can result in injury or equipment damage.