Rockwell-automation AADvance Controller Solutions Handbook Bedienungsanleitung PDF herunterladen (Seite 114)



7-20

Document: 553631

(ICSTT-RM447J_EN_P) Issue: 09:

Solutions Handbook (AADvance Controller)

T9451 Digital Output Module, 24V dc, 8 channel

The T9451 digital output module interfaces up to eight final

elements and can switch 1A at 32V dc for each device. It

features voltage and load current monitoring on each channel,

reverse current protection and short and open circuit line

monitoring. It is designed to always be able to switch off an

output when demanded. No single failure within the module can

cause a stuck-on failure. The module supports dual redundant

power feeds for field devices without the need for external

diodes.

The output module isolates the processor module from the

output channel control and data management circuits, thus

protecting the processor module from potential faults in the

output control circuits and field connections.

The output channel protection activates when the channel load

exceeds a safe limit. The reverse voltage protection circuit in

each output channel ensures that externally applied voltages do

not generate current flow into the module outputs.

The module has self-checking functionality. Short circuit and

open circuit line monitoring is provided on all outputs. Internal

diagnostics carry out ongoing functionality checks ensuring that

the output channel command data is correctly transferred to the

output. In addition, the processor module initiates a test

sequence on each output channel, checking for 'stuck-on' and

'stuck-off' conditions on the output switch pairs.

Front panel LEDs provide module, channel and field connection

status indications. These status indications can be connected to

application variables and viewed at the Workbench.

When a controller uses a pair of digital output modules in a dual configuration, the two

fail-safe output switches on each channel are combined in a parallel arrangement so

that they automatically form a fault-tolerant output configuration.

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 147 148

Keine Kommentare

Rockwell-automation AADvance Controller Solutions Handbook Bedienungsanleitung Seite 114