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ADHB-4 Connections
ACCESSORY Port
The ACCESSORY port is used to connect optional equipment, to the ADHB-4.
The ADHB-4 accessory port provides two (2) balanced recorder outputs designed with 600 Ohms impedance. The common
recorder output sums and amplifies all common audio to a balanced output for single position capability.
NOTE: Version 1.00 does not support recording audio routed to speakers 3–6.
AUX TTL Level Inputs
The AUX 1 and AUX 2 connections detect a contact closure and sends the information to the C-Soft application. Each
input is diode protected from voltages above +5VDC.
These inputs are:
• DC Isolated
• Diode Protected
• Active Hi/Low (configured in C-Soft)
Form C Relay Contacts
The ADHB-4 provides two (2) Form C relay contacts for general use. Each relay is (separately) controlled from C-Soft. A
1Amp resettable fuse protects both sets of contacts.
DB-15 Connector
TABLE 1. DB-15 Pin Outs—Accessory Port
Pin Number Signal Pin Number Signal
1 AUX 1 Input 9 AUX 2 Input
2 ISO GND 10 ISO GND
3 Analog GND 11 Relay 1 N. C.
4 Relay 1 N. O. 12 Relay 1 Common
5 Common Recorder Out + 13 Relay 2 N. C.
6 Common Recorder Out - 14 Relay 2 N. O.
7 Unsel Recorder Out + 15 Relay 2 Common
8 Unsel Recorder Out -
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