Rockwell-automation T7485 ICS Regent+Plus Isolated Guarded Output Modu Manual do Utilizador descarregar pdf (Página 12)

Isolated Guarded Digital Output Module

(T7485)

Industrial Control Services

Resistive Loads

If resistive loads are applied, the isolated Guarded output

module may erroneously annunciate a module fault. This will

occur with a single, fail

safe module configuration. In dual

module configurations, no erroneous faults will be

annunciated until one of the two modules has a fault or is

removed. In either configuration, the outputs will always be

controlled on and off correctl

y; however, the testing of the

output module’s circuits will not be sensed correctly by the

module and it will report output circuit faults.

Other output module types should be used for safety critical

load devices that have resistive load characteristics.

DC Voltage, Low Current Applications

DC applications with low current loads (I

out

< 100 mA) and

long field wiring lengths (L

total

> 2000 feet) may also cause

erroneous fault annunciation and should be avoided. Other

output module types should be consider

ed for these

applications.

Field Wiring

For field wiring details, refer to PD

7901

I/O Termination

Assembly (ITA).

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Rockwell-automation T7485 ICS Regent+Plus Isolated Guarded Output Modu Manual do Utilizador Página 12