Rockwell Automation T8442 Trusted Speed Monitor Module - Manual

SDS-8442
Trusted
TM Industrial Control System
Trusted TM Speed Monitor Module-T8442
Issue 3 Jan 2006
FRONT PANEL
DESCRIPTION
The ICS Triplex Speed Monitor module takes turbine
speed measurement and protection to a new level.
TUV approved SIL 3 compliant and fully TMR, the
Speed Monitor exceeds the requirements of API670
and API612. The Speed Monitor has triplicated
processors on the module which provide overspeed and
over acceleration trip functions completely independent
of the main Trusted processors. This provides true
separation between the protection functions and
application logic running in the Trusted processors. In
fact the Speed Monitor will continue to protect rotating
equipment even if the Trusted processors are
completely removed from the system. This unique
separation is called TMR
2 . TMR overspeed protection
within a TMR system! Full diagnostics on the Speed
Monitor reveal any faults and on-line replacement
without shutting down is quick and easy using the
adjacent Companion Slot. Execution speed is
independent of the Trusted processor scan time and
overspeed protection is accomplished in under 20ms
making the Speed Monitor suitable for high RPM
applications.
The Speed Monitor can accept up to 9 pulse inputs,
active, passive or open collector at speeds over 30,000
Hz. Each pulse input is fully triplicated and power is
available on the termination for active probes. The
module has 6 relay discrete outputs, 3 overspeed and 3
over acceleration, each output capable of interfacing to
a wide range of voltages. Each of the 6 discrete
outputs contains a quad relay architecture that allows
the Speed Monitor to fully monitor and test the relays
while the turbine is running. Failed relays (welded
contacts, failed coils, etc.) are identified by the built in
diagnostics and can be replaced without shutting down.
The Speed Monitor is truly online repairable.
The Speed Monitor is the most advanced overspeed
protection available using TMR
2 technology!
FEATURES
TMR fault tolerant, input
to output
Monitoring and
protection of up to three
machines
Independent machine
protection (API670/612)
Flexible sensor and
output capability
True 1ms SOE
resolution
Hot standby / bumpless
repair with companion
slot
Status leds for module
and field signals
TUV approved IEC 61508
SIL3