Crown MARCO-TECH 5000VZ User Manual page 15

condition based on the power being delívered for the existing heat level.
The ODER amplifier accepts íhis input informaíion and, using an RC
modei of the heat transfer characteristics of the output devíces (as
mounted in the heatsinks), creates a complex output proportional to
thermal reserve.
Output from the positive ODER amplifier ranges from -12V (cold) to +9V
(hard ODER). This output drives the positive Low Síde bias feed control
circuit and the negative High Side Voltage Translator feed control
circuit. Also, this circuit provides test poini moniíoring information and
Bi-ODEP VZ mode control information.
Output from the negative ODER amplifier ranges from +12V (cold) to -
9V (hard ODER). This output drives the negative LS bias feed control
circuit and the positive HS Voltage Translator feed control circuit. Also,
this circuit provides test point monitoring information, Bi-ODEP VZ
mode control information, and front panel ODER (thermal reserve) LED
control information.
Channel 1 ODER Circuitry shown (channel 2 is idéntica!)
Notes
ODER Inputs:
Temperatura
±VCC
Output Current
OffMain
Module
oo—
LM-334Z
nermal Sensor
2.98Vat25'C,
lOmV/'CRise)
CC
•s
Q519 LS
Output
$ R e
I
Dutput Buss I
I
? R e
/
Q524 LS
•> Output
*J
CC
CC^
LM-334Z
hermal Sensor
+Ten
+VC
+IC
+ICC
-ICO
-1C1
-VC
-Ten
p 1
M1
M 1
p 1
ODER Outputs:
Calibrated Temperature, for monitoring
±ODEP Level, for monitoring
±ODEP Level, for Bi-ODEP control of VZ Supply
±ODEP Level, to limit drive at ±Voltage Transiators (±LH)
±ODEP Level, to limit Low Side Bias (±LL)
ODER Indication (front panel LEDs)
On Main Module
Hot
-+9V
Calibrated Temperatura Output
Buffer Amplifier
Thermal Limit Amplifier
-12V
*+ODEP Output
-LH1
+LL1
FAULT1
PWR1
PWR LOSS
+LH1
-LL1
*--ODER Output
MA-5000VZ-13