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.com
Designers Manual
Advanced Energy CoolX600 Series
☞
Important
The maximum collector voltage is 5 V, and the maximum collector current is
12 mA.
Figure 5
‑
2
and
Table 5
‑
2
provide recommendations for driving logic level circuits
with open collector signal outputs.
The module
POWER GOOD
signal is not compatible with dual modules.
D
DU
UAALL M
MO
OD
DU
ULLEE
PPO
OW
WEERR G
GO
OO
ODD
SSIIG
GN
NAALL
The output signal connector (J1001 – J1004) does not indicate the power status of a
dual module. Rather, each dual module channel has a
POWER GOOD
signal that
indicates if there is a voltage on the channel output pins.
+PG
̵PG
Output
Voltage
Sense
Module
VCC
FFiigguurree 55‑‑66..
Dual module POWER GOOD wiring diagram
The
POWER GOOD
signal is the unbiased open collector of an optocoupler that is
available on the module signal connector J1 via the collector on the positive PG pin
and the emitter on the negative PG pin.
When there is a voltage present on the output pins of the output channel, the
transistor of the optocoupler is turned on. If the output drops out of regulation, the
transistor turns off.
To monitor the
POWER GOOD
status of a channel, the positive PG pin should be
pulled up to a reference voltage with a pull-up resistor. The pull-up resistor should be
chosen to limit collector current to 0.5 mA or less. For example, if the reference
voltage is 5 V, the pull-up resistor should be 10 kΩ or higher.
PPM
MBBU
USS C
CO
OM
MM
MU
UN
NIIC
CAATTIIO
ON
NSS
Each module can be monitored and controlled with the following PMBus commands.
For further details, refer to the PMBus manual available for download from
http://
www.excelsys.com
.
Advanced Energy
®
CoolX
®
600 Modular Power Supply
57010208-00B
Communication Controls
5‑7
