Information subject to change
97-7796264_09-04-2020
7548/7794/7796/7796HC OPERATOR’S MANUAL – SECTION 5
22
5 Applications
5.1 Remote Status and Control using
the SIM Interlock I/O Connector
The procedures outlined in this section assume
competence on the part of the reader in terms of
amplifier systems, electronic components, and
good electronic safety and working practices.
AE Techron 7548, 7794, 7796 and 7796HC ampli
-
fiers come with a SIM-BNC input module that also
contains a female, 25-pin D-Sub connector. This
connector can be used to provide remote control
and monitoring of the amplifier.
The information provided here will instruct you in
the wiring of several control and status applica
-
tions including:
•
Remote Run / Standby
•
Over-temperature status
• Run status
•
Overload status
•
Overvoltage status
•
Reset after an Overload error
•
Voltage monitor
• Scaled current monitor
Figure 5.1
maps the pins used for these applications.
For a detailed chart of all DB-25 pinouts,
see “
Appendix 1.”
Figure 5.1 – Remote Status and Control Pinouts
Figure 5.2 – Remote Run/Standby Monitor
5.1.1 Remote Run/Standby Status
Monitor
Using the SIM-BNC Interlock connector located on
the back panel of the amplifier, you can remotely
monitor the Run/Standby status of the amplifier.
Remote Run/Standby Status
Purpose:
Use a voltage meter to monitor the sta
-
tus of the amplifier to determine if the amplifier is in
a “Run” or “Standby” state.
Method:
Connect a voltage meter to monitor the
circuit voltage. Connect across PIN 4 (Interlock)
and PIN 10 (Sampled Common).
When the voltage meter reads greater than 10V,
the amplifier is in the Run state; when the meter
reads less than 10V, the amplifier is in the Standby
state. See
Figure 5.2.
Signal Type:
DC
Level when Asserted:
>10 V
Level when Deasserted:
<10 V
IMPORTANT:
This circuit has a 100K pull-up resis-
tor. Make sure the monitor function has sufficient
impedance to avoid accidentally influencing status.
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