Motor control
➜ ETM / ETM2 / ETM22 motor thermal protection
■ Controls temperature of machines using built-in PTC
probes
■ Line break or probe short-circuit detection
Version ETM2 / ETM22 :
■ Fault latching function
■ Pushbutton for local reset
■ Remote reset via external contact
■ Pushbutton test facility
■ 2 LEDs to indicate relay and power supply status
Specifications
Type Output Supply voltage Code
ETM 1 N/O contact 24 V AC/DC 84 874 015
ETM2 1 changeover 24 V AC/DC
ETM22 2 changeovers 24 V AC 84 874 035
1 N/O contact 120 V AC 84 874 013
1 N/O contact 230 V AC 84 874 014
84 874 025
1 changeover 120 V AC 84 874 023
1 changeover 230 V AC 84 874 024
2 changeovers 120 V AC 84 874 033
2 changeovers 230 V AC 84 874 034
4
General characteristics
Power supply characterisitcs
Supply voltage Un 230, 120 and 24 VAC 50 / 60 Hz
Operating range 0.85 to 1.10 Un
Nominal power 3 VA
Maximal power 5 VA
Immunity from micro power cuts 10 ms
Delay on pick-up 500 ms
Insulation coordination Category III, degree of pollution 2 conforming to IEC 664.1 / VDE 0110 : 4
Input circuit characteristics
Max. resistance of cold probes 1500 Ω
Trip threshold 3100 Ω ± 10 %
Reset threshold 1650 Ω ± 10 %
Short-circuit detection 0 - 10 Ω
Measurement voltage as per IEC 34-11 ≤ 2.5 V
Repetition accuracy with constant parameters ± 0.05 % with constant parameters
Temperature drift
Voltage-dependent drift -2 %
Output characteristics
Output AgNi 90/10
Breaking capacity 2000 VA - 80 W
Max. breaking current 8 A AC
Max. breaking voltage 440 V AC
Min. breaking current 100 mA AC DC
Maximum rate 360 operations / hour at full load
Mechanical life (operations)
Electrical life
General characteristics
Reset time ≤ 500 ms
Response time ≤ 500 ms
Display on ETM2/ETM22 - power supply green LED
Display on ETM2/ETM22 - Relay yellow LED
Class of protection (529) - Term. block IP 20
Class of protection (IEC 529) - Casing IP 50
Material housing Self-extinguishing
Weight (g) 145
Terminal capacity
Temperature limit operation (IEC 68.1.14) (°C) -20 ➞ +60 °C
Temperature limits stored (IEC 68.1.1/2) (°C) -30 ➞ +70 °C
Relative humidity (no condensation) 93 % (+2 % ; -3 %)
To order, see page 6
Galvanic isolation by transformer
24 VDC no galvanic isolation
KV/2
± 0.05 % / oC
6
5 x 10
AC12 : 2000 VA - 105 operations
AC15 : Cos ϕ = 0.3 - 6000 operations
DC13 : L/R = 300 ms - 6000 operations
2 x 1.5 mm2 with ferrule
2 x 2.5 mm
2
without ferrule
148
For more information www.crouzet.com
Dimensions
ETM / ETM2 / ETM22
100
77
5
78,5
11 14 12
Y2 11
Y1
14 12 A2
22,5
4,2
89,7
99,3
23
2
57
Connections
ETM ETM2 ETM22
U
+
CTP DIN 44081
A1 T1 T2
ϑ
+
A2
-
A1 - A2 : Supply voltage
11 - 14 : Output relay
T1 - T2 : External PTC probe
ETM
11
R
14
U
+
A1 T1
A2
CTP DIN 44081
T2
ϑ
+
Y1 Y2
1
12
-
Fault memory
B
A1 - A2 : Supply voltage
11 - 12 -14 : Output relay
T1 - T2 : External PTC probe
Y1 - Y2 : Remote reset contact
A1
11
A2
R
14
A1 - A2 : Supply voltage
11 - 12 -14 : Low threshold output relay (R1)
21 - 22 -24 : High threshold output relay (R2)
T1 - T2 : External PTC probe
Y1 - Y2 : Remote reset contact
Y1 Y2
T1 T2
11
21
12 14 22 24
4
R
S
T
11
A1
R
12 14
S0
S1
r
Y1 A2Y2
c1
T2 T1
>
S2
h1 c1
N
C1 : Contactor
S1 : ON button
S0 : OFF button
S2 : Remote reset contact
h1 : Fault indicator
c1
M3
~
1 6
PTC
DIN 44081
For more information www.crouzet.com
149
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