SECTION 1

M51A OPTION OVERVIEW

1.1Introduction

This addendum is to be used in conjunction with the DLM 600W Series Power Supplies Operation Manual, Sorensen Document No. M362161-01.

The Sorensen M51A Option for the DLM 600W Series power supplies provides a remote analog interface, which has safety isolation from the output terminals. This allows the remote analog interface to be connected to user accessible (SELV) control circuits, even though the output terminals were floated at a high potential with respect to the chassis.

1.2General Description

The M51A Option provides isolation for all programming, monitoring, and digital I/O signals that are available through the remote analog interface. This isolation barrier eliminates the connection that exists in the standard DLM models between the non-isolated remote interface circuits and the output return (negative) terminal. The M51A Option remote analog signals are referenced to chassis, and could be user accessible irrespective of the float potentials that exist at the output terminals.

The M51A Option provides a full complement of programming, monitoring, and control methods. Remote programming is available for output voltage, current, and overvoltage protection (OVP). Analog output monitor signals are available for the output voltage and current. Digital I/O signals provide indication of the operational state, and a means of enabling the remote interface and the output.

The type and range of the control and monitor signals are user-selectable with a rear panel setup switch. The output voltage, current, and OVP could be programmed with a 0-5VDC,

0-10VDC, or 0-5kΩ resistance; in addition, the output voltage and current could be programmed with 4-20mA signals. The output voltage and current monitors could produce 0-5VDC,

0-10VDC, or 4-20mA signals. Isolated 1mA current sources are provided to facilitate the utilization of 0-5kΩ programming resistances.

Except for the isolated remote analog interface, the installation and operation of the DLM 600W Series power supplies remains as presented in the Operation Manual. The following sections provide a detailed description of the new features and the differences in operation.

M51A Option

1-1