Baldor MN735 manual Resistance thresholds are Rising temperature trip resistance

Figure 3-6 Power Connections Continued

10	DIN4/DOUT2
9	DIN3		See Applications/Modes
8	DIN2
7	DIN1
6	+24V
5	AOUT1
4
	+10V Ref	Feedback
3
	AIN2	Setpoint	10k Speed	Volts or
2
	AIN1		Setpoint	0–20mA Input
1
	0V

Connect 0V to PE (protective earth ground) for single control installations only. If multiple controls are used, connect 0V terminals together and ground to PE at one point only.

Size 1 and 3 Terminal Strips

	Size 1
	TH1A
	TH1B
AC	L1
Line		AC Line
	L2/N
	M1/U
Motor	M2/V
	M3/W	Dynamic
		Brake
	1φ 230VAC
		Motor

Size 3

TH1A

TH1B

L1

L2

L3

DC+

DBR DC– M1/U M2/V M3/W

3φ 460VAC

Thermistor Connections (connections are shown in Figure 3-5).

This input is provided for over–temperature detection for motors that have an internal thermistor. There is no polarity to the thermistor connections. This provides “Basic” insulation only to the SELV control circuits and assumes the motor has “Basic” insulation to the windings/mains circuits. The thermistor type supported is PTC ‘Type A’ as defined in IEC 34–11 Part

2. The resistance thresholds are:

Rising temperature trip resistance:	1650 to 4000 ohms
Falling temperature trip reset resistance	750 to 1650 ohms

If the motor does not have an internal thermistor, you should disable the thermistor trip function by:

MN735 Receiving & Installation 3–9