Signal Pin Descriptions; Table 9-1. User Port Signal Pins - Advanced Energy MDX II User Manual

Signal Pin Descriptions

The User port's input signal pins let you control specific operational functions, and the output
signal pins generally report status. Table 9-1 on page 9-7 describes these pins.
Note: An ".A" appended to a pin name indicates an analog signal; a ".D" indicates a digital
signal. A bar over a signal name indicates that the signal is true when low.

Table 9-1. User Port Signal Pins

Signal Return
Pin Pin
1 37
20
5700262-R
Name Signal
Type
CTHSW 1.D digital
CTHSW 2.D output
User Port Connection, Controls and Indicators
MDXII Power Supplies
Description
These 0 to 15 V signals tell an external
device (such as the Advanced Energy
cathode-switching box) which of eight
targets the MDXII unit has been set to
decrement (as specified from either the
control panel or pins 4, 34, and 35).
These signals will sink 35 mA. They are
internally pulled up to 15 V through a
Ω
10-k resistor, and their impedance is
Ω
100 .
Condition of Signal
Target
Selected pin 1
1 / 5 high
2 / 6 low
3 / 7 high
4 / 8 low
When IARC and VARC counters are
enabled through the user port, (factory
configured), cathode switch 1 and 2
respectively indicate when the counter
value has been reached. User port pin 1
will be toggled high for 200 ms to
indicate that the I_ARC counter limit
has been reached. User port pin 20 will
be toggled high for 200 ms to indicate
that the V_ARC counter limit has been
reached.
®
pin 20
high
high
low
low
9-7