T M
Document NAE1038020
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10.2012
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© Bender Inc.
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Page 1/1
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Side 2/2
Bender Inc.
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USA: 800.356.4266 / 610.383.9200 / [email protected]
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Canada: 800.243.2438 / 905.602.9990 / [email protected]
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www.bender.org
VMD420
Installation Bulletin / Reference Guide
Figure 5 - Changing Time Delays
Four separate time delays are available:
•
t
on1
- Response delay, prewarning
•
t
on2
- Response delay, main alarm
•
t - Startup delay
•
t
off
- Delay on release
= Flashing Symbol
T
R
t
on
1 Adjustment
0...10 seconds
> 1.5 sec
< 1.5 sec
< 1.5 sec
< 1.5 sec
R
Press:
1 x for t
on
2
2 x for t
0...10 sec
3 x for t
off
0...99 sec
OR
R
Press Twice
> 1.5 sec
> 1.5 sec
Figure 6 - Latching behavior (fault memory)
Changing this setting to “ON” will cause the VMD420 to latch in the event of an alarm, and
require a manual reset if the alarm clears. Changing this setting to “OFF” will cause the VMD420
to automatically reset if the alarm clears.
= Flashing Symbol
T
R
> 1.5 sec
Press Once
Fault Memory
ON/OFF Select
> 1.5 sec
> 1.5 sec
< 1.5 sec
< 1.5 sec
< 1.5 sec
R
= Flashing Symbol
T
R
Failsafe
ON/OFF Select
> 1.5 sec
Press Once
R
Press Once
R
> 1.5 sec
> 1.5 sec
< 1.5 sec
< 1.5 sec
< 1.5 sec
Figure 7 - Contact operation
Use this option to change the behavior of the contacts between normally deenergized (non-
failsafe) mode and normally energized (failsafe) mode. The two SPDT contacts may be changed
individually. Note that the VMD420 labels normally deenergized operation as “N/O” and nor-
mally energized operation as “N/C”; utilzing a normally open or normally closed contact only
depends on which contact output is wired.
= Flashing Symbol
> 1.5 sec
< 1.5 sec
< 1.5 sec
Press nothing for
undervoltage (<)
6 ... 300 V
otherwise:
R
1x for overvoltage (>)
6 ... 300 V
3x for asymmetry
5 ... 30%
4x for underfrequency
10 ... 500 Hz
5x for underfrequency
10 ... 500 Hz
7x for phase sequence
ON / OFF
< 1.5 sec
T
R
Setpoint Adjustment
< 1.5 sec
> 1.5 sec
To quit
R
OR
To repeat
for more
alarms
x 2
Figure 4 - Setting alarm trip values
The VMD420 may be set to trip on undervoltage, overvoltage, overfrequency, underfrequency,
asymmetry, or phase sequence. Any combination of these alarms may be set. Use the chart
below for configuring trip values. Repeat or skip steps for the types of alarms you would like
to use. Actual enabling and disabling of alarms may be configured using “Figure 8 - Relay Con-
figuration.”
Figure 8 - Relay Configuration
The two relay contacts K1 and K2 may be configured to trip on any combination of alarm
types. For example, K1 may be set to overvoltage and overfrequency, and K2 may be set to
undervoltage and underfrequency. For each contact, each alarm type is turned on or off. The
factory default is set to undervoltage only for K2, and overvoltage only for K1.
= Flashing Symbol
T
R
ON/OFF Select
> 1.5 sec
Press Once
R
Press 3x
R
< 1.5 sec
< 1.5 sec
< 1.5 sec
Press nothing for
Device error (Err)
otherwise:
R
1x for undervoltage (< U)
2x for overvoltage (> U)
3x for asymmetry (Asy)
4x for underfrequency (< Hz)
5x for underfrequency (> Hz)
6x for phase sequence (Phs)
< 1.5 sec
> 1.5 sec
To quit
R
OR
To repeat
for more
alarms
> 1.5 sec
To quit
R
OR
To repeat
for relay 2
x 2
Technical Data
Refer to VMD420 series user manual (document TGH1396en) or VMD420 series datasheet (doc-
ument NAE1032010) for detailed technical information.
