Datasheet

YR20.246
Y-Series
24-28V, 20A, DUAL REDUNDANCY MODULE
8. FRONT SIDE AND USER ELEMENTS
Fig. 8-1 Front side
A
Output terminals (screw terminals)
B
Chassis-Ground terminal
Connection of the chassis is optional and not required since the unit fulfils the
requirements according to protection class III.
C
Input terminals for input 1 (screw terminals)
D Input terminals for input 2 (screw terminals)
E Selector for output current warning threshold
If the output current increases, e. g. due to additionally loads, and exceeds the
nominal current of one power supply unit, redundancy is no longer guaranteed.
To avoid the loss in redundancy, the output current is monitored and is
reported through LEDs and relay contacts when exceeding the predefined
value.
- Set the selector to 5A in combination with two 5A power supplies (1+1 red.)
- Set the selector to 10A in combination with two 10A power supplies (1+1 red.)
- Set the selector to 20A for n+1 redundant systems. With this setting,
redundancy cannot be checked by the redundancy module any more.
Exceeding the current by less than 2 seconds will be ignored.
F
Green LED “Output current < I
N
”
The LED is on solid when the output current is smaller than the adjusted value
of the output current alarm selector (E).
G
Load share LEDs
The three LEDs indicate the status of the load sharing between the two power
supplies.
See chapter 11 for detailed description.
H
Green LED “Redundancy OK”
The LED is on solid when no errors are detected.
Errors:
- One or both input voltages are out of range (below 22V or above 30V).
- Output current is higher than the adjusted value of the output current
threshold setting.
- Internal defect is detected
I
Relay contact “Redundancy OK” (push-in terminals)
The relay contact is closed when no redundancy errors are detected. The relay
contact is also synchronized with the “Redundancy OK” LED.
See chapter 9 for contact ratings.
J
Relay contact “Load share OK” (push-in terminals)
The relay contact is closed when the output voltage of the two power supplies
are sufficiently adjusted.
Deviations less than 2s will be ignored.
See chapter 11 for detailed description.
See chapter 10 for contact ratings.
Jul. 2017 / Rev. 1.4 DS-YR20.246-EN All parameters are typical values specified at 24V, 20A output current, 25°C ambient and
after a 5 minutes run-in time unless otherwise noted.
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