Figure 8-13 External Isolation And Polarity Relay Interface To Control Interface - Ametek ASTDC60D1C-E00 Programming Manual

External User Control Signal Connector
For the all the Digital Output, Low state and High state signal level is as follows.
Low state: 0.3 V max
High state: Minimum 3V or Voltage at Pin 30 (User Power) minus 1 V,
whichever is higher. Maximum Current is 0.5 A
User Power: 5 V to 24 V (Pin 30), Return Pin for User Power is Pin 36.
Connection diagram to use the signals to control external Isolation and Polarity
relays from the DC-Asterion power supply is shown in Figure 8-13.
External relays must not be hot-switched; ensure that the voltage across the
relay contacts and the current through them is zero prior to changing the relay
states.
CAUTION
Analog and external
control interface
connector
OUTPUT +Ve
OUTPUT -Ve
Isolation Relay (Pin 37)
Return Pin 28 or 36
Ploarity Relay (Pin 38)
Return Pin 28 or 36

Figure 8-13 External Isolation and Polarity Relay interface to Control interface

8-20
Isolation Relay
Note: Voltage level at Pin 37 and Pin 38 is minimum 3 V or the
User Power Pin 30 minus 1 V, whichever is higher. Maximum Continuous
Current that can be drawn is 0.5 A. If the relay coil current required is
more an additional current driver to be used to drive the Isolation and
Polarity Power Relays
Asterion DC Series Programming
Polarity Change Relay
M330461-01 Rev A
(+/-) IN
(-/+) IN
Load
Voltage at