MS-2102
2.3
Chapter 2
Installation
Mounting the Controller
Mount the control panel with Unistrut brackets using 1/2”
bolts. The Unistrut (or equivalent) mounting allows air
circulation to cool the heat-sink. This is important to
ensure proper operation of the MS-2102. For optimum
readability, mount with the display at eye level and not
in direct sunlight. Mounting dimensions are shown in
Figure 2.6
.
Wire Sizing
Conduit and Cabling
The MS-2102 comes with one 3/4” and three 1/2” conduit
knockouts located on the bottom of the enclosure.
Conduit hubs should be NEMA-4X rated, such as T&B
H050-0.5 and H075-0.75 or Myers equivalent, to maintain a
watertight seal. Unused knockouts should be sealed
using NEMA-4X rated seals.
Power Wiring
The power input terminals 2 & 3 supply power to both
heater 1 and controller, while power input terminals 26 &
27 supply power to heater 2. Size power input wires
appropriately to the breaker size and maximum ambient
operating temperatures. Maximum breaker size is 30A.
Connect power wires to input terminals 2 & 3, and 26 &
27.
See
Figure 2.7
.
The RTD probe is delicate and should not
be bent or used as a tool to puncture
insulation.
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.
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The supply voltage must be within the power
supply range of 85-280Vac and rated voltage
range of the heat trace cable.
Wiring methods must conform to Class I,
Division 2 or Class I, Zone 2 requirements.
Heater Wiring
Connect the two heating cables wiring to terminals 4 & 5,
and 28 & 29, respectively.
See
Figure 2.7
. If the heating
cable has a braid, it should be terminated to the ground
stud using a ring terminal suitable for #10 stud.
Ground Connection
Connect the controller grounding stud directly to a
ground bus using the shortest, practical path. Use a
tinned copper, braided bonding cable such as Belden
8660. As a guideline, the ground cables should be mini-
mum 96 strands, number 34 AWG each.
The grounding is not only a safety requirement but is
necessary for the input transient protectors or the RTD
and communication inputs to work properly. The transient
protection network is grounded through terminal 14,
safety ground, which is bonded to the chassis ground stud.
To install the ground connection, remove the outside nut,
washer and #10 ring lug provided on the ground stud.
Crimp the ground cable onto the ring lug and re-assemble
onto the ground stud using the washer and nut.
Figure 2.4
RTD Mounting
RTD Sensor Wiring
RTD sensors should be 3-wire, 100 ohm, platinum to DIN
standard 43760. Mount the RTD element on the pipe,
away from the heat trace and 30° to 45° from the bottom
of the pipe. The total circuit resistance per conductor
from the RTD to the control panel must be less than 10
ohm. Exceeding this resistance will result in a non-linear
temperature measurement. Belden cable 8770 or
equivalent allows RTDs to be placed up to 1,000 feet
from the control panel. Complete all RTD wiring accord-
ing to
Figure 2.7 Typical Wiring Diagram.
Figure 2.3
Ground Connection
Содержание MASTERTRACE MS-2102
Страница 1: ...MASTERTRACE MS 2102 OPERATOR S MANUAL HEAT TRACING CONTROL ...
Страница 10: ...MS 2102 1 7 Chapter 1 Product Overview Figure 1 5 Hardware Block Diagram ...
Страница 12: ...2 2 MS 2102 Chapter 2 Installation Figure 2 2 Power Board Layout Figure 2 1 Main Board Layout ...
Страница 22: ...4 2 MS 2102 Chapter 4 Front Panel Operation Figure 4 1 Display Front View Figure 4 2 Contrast Control ...
