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Rockwell Automation Publication 825-UM004D-EN-P - November 2012
Chapter 6
Configuring Protection & Logic Functions
•
At no-load: protection against asymmetry and underload
•
During brief overload phases: high overload/jam
•
During commissioning and fault location: (localizing the source of the
trouble) the selected functions are completely disabled as long as the
control input is asserted.
•
No warning
•
No trip; no reset
•
Tripping delays begin to run only after the function is re-enabled.
Output Relay Behavior
The 825-P allows you to enable fail-safe output contact operation for relay
contacts on an individual basis. When contact fail-safe is enabled, the relay
output is held in its energized position when relay control power is applied
and falls to its de-energized position when control power is removed. Contact
positions with de-energized output relays are indicated on the relay chassis
(and also in Figure 4).
When Trip Output Fail-safe is enabled and the Trip contact is appropriately
connected to the motor breaker or contactor, the motor is automatically tripped
when relay control power fails. This setting/connection philosophy is appropriate
if the protected motor is more valuable than the process that the motor supports.
In critical applications where the protected motor is not more valuable than the
process, you may want the motor to run even if the relay is out of service. In this
case, disable Trip Output Fail-safe by selecting N.
In addition, you can select an auxiliary outputs to be Fail-Safe or Non-Fail-safe,
depending on your application.
Table 38 - Relay Behavior Settings
Setting Prompt
Setting Range
Factory Default
TRIP FAIL-SAFE
Y, N
Y
AUX1 FAIL-SAFE
Y, N
Y
AUX2 FAIL-SAFE
Y, N
Y
AUX3 FAIL-SAFE
Y, N
Y
AUX4 FAIL-SAFE
Y, N
Y
AUX5 FAIL-SAFE
Y, N
Y
AUX6 FAIL-SAFE
Y, N
Y
ATTENTION:
Pay close attention to the Trip Fail-Safe setting to ensure proper labeling
of the plug connector for terminals 95, 96, and 98.
Содержание 825-P
Страница 1: ...Modular Protection System for Motors Catalog Number 825 P User Manual...
Страница 4: ...4 Rockwell Automation Publication 825 UM004D EN P November...
Страница 44: ...44 Rockwell Automation Publication825 UM004D EN P November 2012 Chapter 3 Front Panel Operation...
Страница 64: ...64 Rockwell Automation Publication825 UM004D EN P November 2012 Chapter 5 Using MPS Explorer...
Страница 104: ...104 Rockwell Automation Publication825 UM004D EN P November 2012 Chapter 6 Configuring Protection Logic Functions...
Страница 130: ...130 Rockwell Automation Publication825 UM004D EN P November 2012 Chapter 9 825 PDN DeviceNet Communication Card...
Страница 182: ...182 Rockwell Automation Publication825 UM004D EN P November 2012 Chapter 12 ASCII Serial Communications...
Страница 186: ...186 Rockwell Automation Publication825 UM004D EN P November 2012 Chapter 13 Firmware Upgrade Instructions...
Страница 234: ...234 Rockwell Automation Publication 825 UM004D EN P April 2012 Chapter B ParameterList...
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