Rockwell Automation T8442 User Manual
SDS-8442
TM
Trusted
Industrial Control System
TrustedTM Speed Monitor Module-T8442
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
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.
2
. TMR overspeed protection
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
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!
Hot standby / bumpless
repair with companion
slot
Status leds for module
and field signals
TUV approved IEC 61508
SIL3
Issue 3 Jan 2006
SDS-8442
Trusted
TM
Industrial Control System
TrustedTM Speed Monitor Module-T8442
BLOCK DIAGRAM
D
iagnostics
P
ROCESSOR
(
Slice A)
1
Diagnostics
PROCESSOR
(Slice B)
1
D
iagnostics
PROCESSOR
(Slice C)
1
SPEED
TRANSDUCER
D
iagnostics
SPEED
INPUT
(
Slice A)
1
Diagnostics
S
PEED
INPUT
(Slice B)
1
D
iagnostics
S
PEED
I
NPUT
(
Slice C)
1
ELECTRICAL SPECIFICATION
Number of channels
Field common Isolation
Measurement range
Accuracy
Sequence of events
Response time
Circuit type
Power consumption
Pulse input - 9
Digital output - 6
Sustained working - +/- 250Vdc
Max withstanding - +/_ 2.5KVdc
dc - 30,000Hz
0.01%
Resolution - 1ms
<20ms
Fault tolerant, fully triplicated
18W
Diagnostics
O
UTPUT
(Quad 1)
1
Diagnostics
O
UTPUT
(
Quad 2)
1
Diagnostics
OUTPUT
(Quad 3)
1
Diagnostics
O
UTPUT
(
Quad 4)
1
RELAY
(Quad 1)
1
RELAY
(Quad 2)
1
RELAY
(Quad 3)
1
R
ELAY
(
Quad 4)
1
Diagnostics
D
iagnostics
N
E
nergised
ormally
L
OAD
N
ormally
D
eEnergised
L
OAD
MECHANICAL
SPECIFICATION
Dimensions HxWxD mm (inches):
241 x 30 x 300
(9.5 x 1.2 x 11.8)
Weight
1.3kg (approx.)
2.9lbs (approx.)
Environmental
Operating Temperature:
-5°C to 60°C
(23°F to 140°F)
Operating Humidity:
5 to 95%, non-condensing
Vibration:
10 to 57Hz ±0.075mm
57 to 150Hz 1g
Shock:
15g, ½ sine wave, 11ms
EMI (IEC 801):
ESD
Air discharge to 15kV
Contact discharge to 8kV
Radiated Fields
10V/m, 27MHz to
500MHz
Transients and Bursts
2kV, 2.5kHz for
t=60 seconds
Associated products
ICS Triplex
Cable, TC-801
Input FTA, T8846
Output FTA, T8891
Technical data sheets are intended for
information and guidance. The Company
has a policy of continual product
development and improvement.
Specifications are subject to change
without notice. For latest information, visit
our Websi te:- www.icstr iple x.com
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