3-36 Receiving & Installation
MN715
External Trip Input
Terminal J4-16 is available for connection to a normally closed thermostat or overload
relay in all operating modes as shown in Figure 3-36. The thermostat or overload relay
should be a dry contact type with no power available from the contact. If the motor
thermostat or overload relay activates, the control will automatically shut down and give
an External Trip fault. The optional relay (CR1) shown provides the isolation required
and the N.O. contact is open when power is applied to the relay and the motor is cold. If
the motor thermostat is tripped, CR1 is de-energized and the N.O. contact closes.
Connect the External Trip Input wires (N.O. relay contact) to J4-16 and J4-17. Do not
place these wires in the same conduit as the motor power leads.
To activate the External Trip input, the External Trip parameter in the Level 2 Protection
Block must be set to “ON”.
Figure 3-36 Motor Temperature Relay
T1
T2 T3
G
* Motor
16
17
J4
External Trip
Do not run these wires in same conduit
as motor leads or AC power wiring.
Customer Provided
Source Voltage
Motor Thermostat Leads
CR1
*
*
Optional hardware. Must be ordered separately.
Note: Add appropriately rated protective
device for AC relay (snubber)
or DC relay (diode).
See recommended terminal
tightening torques in Section 6.
Opto-Isolated Inputs
The equivalent circuit of the nine opto inputs is shown in Figure 3-37. The function of
each input depends on the operating mode selected and are described previously in this
section. This Figure also shows the connections using the internal opto input Supply.
Figure 3-37 Opto-Input Connections (Using Internal Supply)
See recommended terminal tightening torques in Section 6.
+24VDC @ 200mA
(supply terminal 39).
Jumper terminals 39 to 40
(Factory Installed)
6.8K
6.8K
6.8K
6.8K
6.8K
6.8K
6.8K
6.8K
6.8K
15
16
17
39
40
Opto In #8
Opto In #9
Opto In Common
8
9
10
11
12
13
14
J4
Opto In #1
Opto In #2
Opto In #3
Opto In #4
Opto In #5
Opto In #6
Opto In #7
