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3.5
Motor Connections
DX motors are available in two different styles for most models; waterproof designated
by a W in the motor model number, and connectorized, designated by a C in the motor
model number. The waterproof type has been designed to meet IP65 waterproofing
standards. Cable entries are made through American National Standard Tapered Pipe
Threads (NPT) conduit holes. The connectorized type of motors come equipped with
one or two MS style multi-pin connectors. See Table 3-B for motor connector options.
Table 3-B – Motor Connector Options
DX MOTOR
MODEL
DX-208
DX-316
DX-340
DX-455
DX-490
DX-4120
Note: Motors equipped with MS style connectors meet IP65 waterproofing
standards. However, the mating cables and connectors do not. If waterproofing
is required, motors with NPT conduit holes should be ordered.
3.5.1 Motor Thermal Protection
In each of the motors there is at least one level of thermal protection. Every motor
model has three 150° C thermal switches mounted directly within the motor windings.
The contacts are connected in series and are available via the motor connections for
controller sensing of motor temperature. The Waterproof motors also include a second
thermal switch which is electrically in series with the three winding sensors and is
mounted in the area of the user wiring terminal strips. This second thermal switch is set
to a lower temperature (80° C) to protect the lower temperature type PVC insulated
wiring that may be used for the motor connections. This lower temperature thermal
switch may be shunted out of the circuit by a jumper on the connection board when the
higher temperature connection wiring is used. All motor wiring supplied by Emerson
EMC is rated for at least 105° C., so the low temperature switch can be jumpered out.
The contacts remain closed as long as the temperature stays within operating range.
When the temperature exceeds the specification, the contacts will open. These
contacts are generally connected to the servo amplifier which shuts the amplifier off to
protect the motor from damage. The thermal switch contact ratings are 30VDC, 500
milliamps.
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
WITH MS STYLE
CONNECTORS
YES (ONE)
YES (TWO)
YES (TWO)
YES (TWO)
YES (TWO)
YES (TWO)
WITH NPT
HOLES
N/A
YES
YES
YES
YES
YES
Section 3– Page 9
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