Selco
C6200 FlexGen
Revision: 03-06-2014
Page 21 of 24
Terminal
Signal
Description
65
DC voltage
External voltage input
66
DC voltage
External voltage input
67
Reference (COM)
Internal reference
It is important to note that each analogue output is protected against short-circuit by an internal 10
k
Ω
resistor. Resistors are placed in series on the output terminal. The output resistor might affect
the magnitude of the output signal if the internal resistance of the driven equipment is low. The
principle of voltage division applies between the output resistor and the internal resistance of the
driven equipment. Example: equipment with an internal resistance of only 10 k
Ω
would reduce a
+10 VDC output voltage to +5 VDC. The two 10 k
Ω
resistors in series would make a 1:2 voltage
divider.
5.12 Alarm
The alarm relay includes two contact sets. The alarm relays can only operate as normally energized
relays. This is to ensure that the alarm relay will trip in case the supplies fail.
The alarm relay can also be configured to trip on a protection fault.
Terminal
Description
Signal
Connection
68
Alarm Contact
Relay de-energized position
Alarm system
69
Alarm Contact
Relay contact
Signal source
70
Alarm Contact
Relay energized position
Alarm system