AE Techron 7548 Operator's Manual page 41

Pin # Function Description
10
Sampled Amp Analog
Common Ground; Blanking
Ground
11
OverTemp Over-temperature
Out output
12
Run Amplifier Run output DC
13 –24V –24V Power Output
14 Common Ground before
Sense Resistors
15
–1 IN Differential Follower
Input
16
+24V +24V Power Output
17
Digital Ground Digital circuitry
ground - Interlock
Common
18 OEM App Input Monitor (OEM
only)
19
I MON – Differential Current
(alt.: OEM Monitor – ;
App) (- Input Monitor,
OEM only)
Signal Level when Level when
Type Asserted Deasserted
DC –24V 0V
–24V 0V
DC
AC or Up to 200V 0V
DC peak
DC
DC 0V 0V
7212/7224/
AC or
DC 7226: 5A/V
7548/7794/
7796/7796HC:
20A/V
Notes
Amplifier ground.
When amp is normal, this pin
is pulled to –24V through a
47.5K-ohm resistor; when amp is in
OverTemp state, this pin is ground-
ed. Do not exceed 7 milliamps.
When amp is in Standby mode, this
pin is pulled to –24V; when amp is
in Run mode, this pin is grounded,
energizing Mains Relays and allow-
ing drive for an external LED.
DO NOT exceed 7mA; DO NOT
ground this pin as this will enable
Main Power Relays.
–24V dc, 30 mA max
Current monitor reference. Voltage
between Common and Sampled
Common is voltage on the Current
Sense resistor.
Only used in multiple amplifier
configurations, Series mode.
+24V dc, 30 mA max.
Used to monitor the input signal
from an OEM DAC card; this is the
actual input signal.
Inverted I MON+ (PIN 6). Output
current produced per voltage
detect.
Applications
Can be used as Blanking return or as a reference of the
amplifier for status reporting applications. See Over-
Temp (PIN 11), Run (PIN 12), Overload (PIN 23), and
OverVoltage (PIN 24).
Remote Signal of Over-Temperature Condition: LED,
when lit, signals Over Temperature condition. Use a 6
mA series resistor of 4.7K-ohm for LED or OPTO, tie to
–24V source (PIN 13).
Remote Signal of Run Condition: LED, when lit, sig-
nals Run state. Use a 6mA series resistor of 4.7K-ohm
for LED or OPTO, tie to –24V source (PIN 13).
Internally tied for use in status reporting applications.
See OverTemp (PIN 11), Run (PIN 12), Overload (PIN
23), and OverVoltage (PIN 24).
Possibly series amplifiers will not need current reporting
on the High side amp, since its current will be same as
Master.
Can accept output of PIN 1 (Amplifier Output) OR PIN
2 (Sampled Common) from Master device when in
Follower mode.
Used in status reporting applications. See OverTemp
(PIN 11), Run (PIN 12), Overload (PIN 23), and Over-
Voltage (PIN 24).
Used with PIN 25 (Reset) for Remote Reset from
Standby or Stop after Error. Used with PIN 4 (Interlock)
for simultaneous remote to Standby of all amps in a
multi-amplifier system.
OEM modification only; normally no connection.
Current Monitoring: Connect a voltage meter to
monitor the output current being produced by the
amplifier. For each 1V detected, current output is 5A
(7212/7224/7226) or 20A (7548/7794/7796/7796HC).
A2