Wohler ALARM-24 Series User's Guide download pdf (Page 22)

VAMP2 Series User Guide

Rear Panel Connectors

Figure 1–5 Balanced AES In with Loop Out

DB-25 Connector Pin-Out

• RS-232 #1 (DB-9): This connector provides an interface for

downloading the user interface, unit functionality, AES

programming, setup, and diagnostic information into and out of the

unit.

• AES Input Termination (DIP Switch): Termination for both pairs

(AUX 1 and AUX 2) of the AES inputs (AES IN, 1 or 2) is adjustable

through the four-position DIP switches located between each pair of

input connectors. The switch section nearest the associated

connector sets the termination for that connector. Move the switch

down (75 , balanced; 110  unbalanced) to terminate the

connector, or up (HI Z) to unterminate. See Figure 1–6 below and

Figure 1–7 on page 21 for switch ID settings.

Figure 1–6 AUX 1 - AES Input Termination

AES1 AES2 AES1 AES2 AES1 AES2 AES1 AES2

AUX 1

AUX 2

AUX 1

AUX 2

AES Input

Loop-Through

Output

1234

Up: Unterminated

Down: Terminated

AUX 1, AES 1 Balanced

AUX 1, AES 1 Unbalanced

AUX 1, AES 2 Balanced

AUX 1, AES 2 Unbalanced

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Wohler ALARM-24 Series User's Guide Page 22