4.2
MASTERTRACE Chapter 4 Installation
protectors on the modules can not provide the necessary
protection without a solid ground.
4.7 Safety Ground
Each of the ten RTD inputs are protected by a transient
suppressor network which acts as a barrier against
transient energy pick-up by the RTD probe. In order for
this protection to work effectively, terminals 122 and 123
must be terminated to a solid ground separate from the
enclosure chassis ground. On panels pre-wired at the
factory, transient ground is tied to earth ground so that it
is not left open. It is recommended that transient ground
be disconnected from enclosure ground and moved to a
separate ground.
Note: The transient suppressor network is not an
intrinsically safe barrier and is only available on 5 and
10 point models.
4.8 Control Power Wiring
The control panel requires control power supplied from a
dedicated circuit breaker. The supply voltage for control
power to the MasterTrace modules is 120VAC. If the
supply voltage is incorrect, the modules may be damaged.
Control power must be protected by a circuit breaker no
larger than 15A. If the control panel includes a breaker
panel, control power connection to a branch breaker will
be already done at the factory. Recommended wire size
for control power wiring is 14 AWG at maximum ambient
temperature of 40°C and 12 AWG t maximum ambient
temperature of 50°C.
Wiring methods should comply with
Canadian Electrical or National Electrical
Code and local codes. Power and signal
wires should not be run in the same conduit
system. Wiring should be rated at least 90
°C. Wiring methods must conform to Class
1, Div.2 or Class 1, Zone 2 requirements.
4.9 Alarm Wiring
MR100 for Winsows CE only has one mechnical & NO
alarm contact and a hardware configurable LED alarm
output.
All other MasterTrace controllers have two alarm con-
tacts and one active alarm output for driving a LED alarm
indicator. Both the alarm contacts are software
configurable for normally open or closed. The alarm LED
output is software configurable for alarm on, alarm off or
flash during alarm. Refer to typical wiring diagrams in
Appendix D for alarm output terminals.
The mechanical alarm output is rated 30Vdc/10mA,
250Vac/0.5A in hazardous locations and 120Vac/1A,
4.9 Commissioning
Commissioning the MasterTrace Control Panel requires
an understanding of its functions including how to display
measured values and, if necessary, to change setpoints or
configuration. Read Chapter 5: Operation and Chapter 6:
Programming & Setup before proceeding if you are not
familiar with the MasterTrace operation.
Once the wiring is complete and in accordance with the
Typical Wiring Diagram in Appendix D, close the circuit
breaker to provide control power to the panel.
For MR100 for Windows CE, a proper function page
appears on the touch screen after power-up. Refer to
Appendix G for the operation of MR100 for Windows CE.
For MR100/ML100 Interface Module, this sequence of
messages displays on power-up:
MASTERTRACE HEAT
TRACING CONTROL
NEXTRON CORP
(403) 735-9555
FIRMWARE VERSION:
REV. D1-05-00
MANUAL VERSION:
1501-0006_1
SELF TEST
PASSED
Refer to Appendix C: Summary of Alarms and Causes, if
the Self Test Failure alarm light turns on or the Interface
Module displays this message:
SELF TEST
FAILURE ALARM
30Vdc/0.1A in ordinary areas. The DC alarm output is an
opto-isolated transition output rated 30Vdc/100mA,
500mW max.
The alarm LED output is rated 12Vdc, 30mA. It can be
used to drive a 12Vdc LED indicator. Alarm outputs are
designed for interface to annunciator, panels, PLC or
DCS.
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