Dynacord DPA 4140, DPA 4120 owner manual Enhanced application field, 8.1Standard input module NRS

output	bridge
	B411 to
100 V	B407
70 V	B408
50 V	B409
4 ohms	B410

table 1 bridge B411 settings switching the output voltage

figure 5 coding-bridges S405 / S406 settings output recognition OUTPUT CONFIG

Caution It is possible that during operation shock-hazard output voltages can be present at the POWER OUTPUT connector (>34V peak value). Thus, the connected loudspeakers have to be installed in accordance to applicable security standards and regulations (see also paragraph 8.5.2).

8.Enhanced application field

8.1Standard input module NRS 90225

This input module for the power amplifiers DPA 4120 and DPA 4140 is meant for insertion at the power amplifiers' rear. It provides the following functions:

•lockable XLR input connector

•XLR output connector; to patch the input signal through

•gain control; to be adjusted using a screwdriver

•mains remote ON/OFF

•battery remote ON/OFF

•control of the D- and E-relays

•fault messages via the READY relay contact:

-thermal overload of the mains transformer

-thermal overload of the power amplification stage

-ground fault (optional; only with installed NRS 90224)

-pilot tone signal (optional; only with installed NRS 90224)

•MONITOR output; electronically balanced

•input transformer for floating, balanced input; optional

•output transformer for floating, balanced monitor output; optional

The input module is meant to be used with the power amplifiers DPA 4120 and DPA 4140. The module allows to control and monitor the operation of the power amplifiers using conventional equipment or (with reservations) by the PROMATRIX manager DPM 4000.

Caution: Before installing the input module NRS 90225, you have to unplug the mains connector as well as a presumably connected battery cord.

Before installing the input module, it is necessary to remove the two locking screws B on the rear panel of the appliance. For installation the printed board assembly first has to be inserted into the guiding rails. After carefully pushing the module in it has to be locked by using the two screws mentioned before.

32