Thermal Switch Connection - Baldor FDH1A05TB-EN20 Installation Manual

3.5.5 Thermal switch connection

You might wish to wire the motor's thermal switch contacts (normally closed), using a relay, to
a digital input on connector X3 (see section 4.3.1). Using the Mint WorkBench Digital I/O tool,
the input can be configured to be the motor trip input. This allows the FlexDrive
motor over-temperature conditions. The Mint keyword MOTORTEMPERATUREINPUT can also
be used to configure a digital input for this purpose. A typical circuit, using DIN1 as the input,
is shown in Figure 9.
motor
thermal
switch
CAUTION: The 24VDC power supply connected to the thermal switch must be a
3-18 Basic Installation
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
A
B
+24VDC 0V
Separate
customer
supplied
24VDC supply
Figure 9 - Motor thermal switch circuit
separate supply as shown in Figure 9. Do not use the 24V supply used
for the drive enable signal, or the internally generated supply (if present).
The thermal switch wires often carry noise that could cause erratic drive
operation or damage. The thermal switch contacts must never be wired
directly to a digital input.
The separate 24VDC supply used for the thermal switch may also be
used for the motor brake circuit (section 3.5.6).
Relay
+24VDC 0V
Customer
supplied
24VDC
supply
www.baldormotion.com
II
to respond to
X3
10 DIN0 (INX.0)
11 DIN1 (INX.1)
12 DIN2 (INX.2)
13 DIN3 (INX.3)
14 DIN4 (INX.4)
15 DIN5 (INX.5)
16 DIN6 (INX.6)
17 DIN7 (INX.7)
7 CREF
MN1902