The N121-132A Snap Trac Card contains a complete DC servo amp together with a DC power supply consisting of an AC to DC rectifier and voltage regulators.The servo amp is designed to drive a servo valve with ± DC current having high dynamic response and negligible drift. The N121-132A Snap Trac Servocontroller contains all the features of the N122-142A Servocontroller, with the addition of a built-in power supply.

It is a forward compatible replacement for both the 121A132 and 121B132. The N122-142A Snap Trac Servoamplifier is designed to drive servovalves or proportional valves in open-loop or closed-loop servo systems. It provides any combination of proportional, integral, and derivative control (PID) and requires an external regulated power source. The N122-142A is a forward compatible replacement for both the 122A142 and 122B142.

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