Datasheet_TER_7
2-stage thermostat TER-4
Thermostat for monitoring temperature of motor winding TER-7
• Two-state thermostat for temperature monitoring and regulation in a wide range -40 °C to +110 °C (-40 °F to 230 °F)
with a switch for temperature ranges shift and fine temperature setting (high accuracy of setting).
• It can be used for temperature monitoring in e.g. switchboards, heating systems, cooling systems, open spaces, objects,
liquids, radiators, etc.
• 2 thermo inputs for sensor NTC 12 kΩ/25 °C (77 °F).
• Possibility to choose if both thermostats should work independently or dependently (by DIP switch).
• Function of short-circuit or sensor disconnection monitoring.
• Possibility to set functions “heating ” /“cooling ” (setting is done by DIP switch).
• Adjustable hysteresis (sensitivity) of switching 0.5 or 2.5 °C (32.9 or 37 °F) (DIP switch).
• Choice of external thermo sensors with double insulation in standard lengths 3, 6 and 12 m (9.8´,19.7´ and 29.5´).
• It is possible to place the sensor directly on terminal block – to monitor temperature in a switchboard or in its surroundings.
• Galvanically separated supply AC 230 V or AC/DC 24 V.
• 2 independent output with changeover contacts/ SPDT 16 A /250 V AC1.
• Output status indicated by red LED, faulty status of sensor by yellow LED.
• 3-MODULE, DIN rail mounting.
EAN code
TER-4 /230V: 8594030337806
TER-4 /24V: 8594030338148
TER-4
Technical parameters
Function:
Supply terminals:
Voltage range:
Burden:
Supply voltage tolerance:
Measuring circuit
Measuring terminals:
Temperatue ranges
(set via switch individually for each
level):
Fine temperature setting:
Hysteresis for T1:
Hysteresis for T2:
Sensor:
Sensor failure indication:
Accuracy
Setting accuracy (mech.):
Repeat accuracy:
Temperature dependance:
Output
Number of contacts:
Current rating:
Breaking capacity:
Inrush current:
Switching voltage:
Min. breaking capacity DC:
Output indication:
Mechanical life:
Electrical life (AC1):
Other information
Operating temperature:
Storage temperature:
Electrical strength:
Operating position:
Mounting:
Protection degree:
Overvoltage category:
Pollution degree:
Max. cable size (mm2):
Dimensions:
Weight:
Standards:
double thermostat
A1-A2
AC 230 V (AC 50-60 Hz), AC/DC 24V galvanically separated
max. 4.5 VA
- 15 %; + 10 %
Connection
Symbol
Un
A1
35 to 50+35..
°C / 95 +50
to 122°C°F
50 to 65+50..
°C / 122+65
to 149°C°F
65 to 80+65..
°C / 149+80
to 176°C°F
80 to 95+80..
°C / 176+95
to 203°C°F
95 to 110+95..
°C / 203
to 230°F
+110
°C
0-15 °C, in selected range
adjustable, 0.5 or 2.5 °C / 32.9 or 37°F (DIP switch)
adjustable, 0.5 or 2.5 °C / 32.9 or 37°F (DIP switch)
thermistor NTC 12 kΩ/ 25 °C (77 °F)
yellow LED
18
26
28
A2
15
A1 A2 T1 T1 T2 T2
25
16 15 18 28 25 26
Description
Function: dependent /independent
Function of thermostat:
HEATING/COOLING (inverts output)
Supply voltage indication
Adjusting hysteresis for T1
Adjusting hysteresis for T2
5%
0.5 °C / 32.9 °F
< 0.1 % / °C (°F)
Output contact-relay 1
Temperature adjusting T1
Sensor failure
Temperature adjusting T2
Output contact-relay 2
2x changeover/ SPDT (AgNI / Silver Alloy)
16A / AC1
4000 VA / AC1, 384 W / DC
30 A /< 3 s
250 V AC1 / 24 V DC
500mW
red LED
3x107
0.7x105
-20 °C to 55 °C (-4 °F to 131 °F)
-30 °C to 70 °C (-22 °F to 158 °F)
4 kV (supply - output)
any
DIN rail EN 60715
IP 40 from front panel / IP 20 terminals
III.
2
solid wire max.1x 2.5 or 2x1.5/ with sleeve max. 1x1.5 (AWG 12)
90 x 52 x 65 mm (3.5˝ x 2˝ x 2.6˝)
238 g (8.4 oz.)
EN 60730-2-9, EN 61010-1
Temperature adjusting fine
Adjusting temperature range
Function
Independent function
Un
T1
Dependent function
H1
H1
15-18
heating
15-18
cooling
Chart information:
Un –supply voltage
T1 –set temperature of thermostat 1
T2 –set temperature of thermostat 2
H1 –set hysteresis of thermostat 1
H2 –set hysteresis of thermostat 2
15-18 output contact of thermostat 1
25-28 output contact of thermostat 2
Un
T2
25-28
T1
15-18
no blocking
15-18
blocking
• Fixed levels of switching.
• PTC sensor is used for sensing, it is in-built in motor winding by its manufacturer or there is used an external PTC sensor.
• MEMORY function - relay is blocked in an error state until until operator intervention (press RESET button).
• RESET of faulty state:
a) button on the front panel
b) by external contact (remote by two wires).
• Function of short-circuit or sensor disconnection monitoring, red LED flashing indicates faulty sensor.
• Output contact: 2x changeover/DPDT 8 A /250 V AC1.
• Red LED shines and indicates exceeded temperature.
• Terminals of sensor are galvanically separated, they can be shorted out by terminal PE without damaging the device.
• Multivoltage supply AC/DC 24-240 V.
EAN code
TER-7: 8595188137164
Technical parameters
1. sensor 2. sensor
T1
T1
T2
T2
T1-T1 a T2-T2
-40 to-40
-25..°C-25
/ -40°Cto 77 °F
-25 to-25
-10..°C-10
/ 77 °C
to 50 °F
-10 -10
to 5 ..°C /+5
50 to°C41 °F
5 to+205 ..°C+20
/ 41 to°C70 °F
20+20
to 35..°C+35
/ 70 to°C95 °F
16
• It monitors motor coil temperature.
H2
H2
H1
H1
Blocking function:
When DIP switch 4 is in position ON, condition for
thermostat switching is switching output 15-18 at
both individual thermostats (series function). Thus it is
possible to use e.g. first thermostat as operational and
the other as an emergency one.
Output 25-28 operates normally, according to T2.
Function:
Supply terminals:
Voltage range:
Burden:
Operating range:
Measuring circuit
Measuring terminals:
Cold sensor resistance:
Upper level:
Botton level:
Sensor:
Sensor failure indication:
Accuracy
Accuracy in repetition:
Switching difference:
Temperature dependance:
Output
Number of contacts:
Current rating:
Breaking capacity:
Inrush current:
Switching voltage:
Min. breaking capacity DC:
Mechanical life:
Electrical life (resistive):
Other information
Operating temperature:
Storage temperature:
Electrical strength:
Operating position:
Mounting:
Protection degree:
Overvoltage category:
Pollution degree:
Max. cable size (mm2):
Dimensions:
Weight:
Standards:
108
TER-7
Symbol
monitoring temperature of motor winding
A1-A2
AC/ DC 24 - 240 V (AC 50-60Hz)
max. 2 VA
-15 %; +10 %
A1
16
18
26
A1
28
25 26 28
PTC
Tb
R
A2
15
25
15 16 18
Ta
-20 °C to 55 °C (-4 °F to 131 °F)
-30 °C to 70 °C (-22 °F to 158 °F)
4 kV (supply - output)
any
DIN rail EN 60715
IP 40 from front panel / IP 20 terminals
III.
2
solid wire max.1x 2.5 or 2x1.5 with sleeve max. 1x2.5 (AWG 12)
90 x 17.6 x 64 mm (3.5˝ x 0.7˝ x 2.5˝)
83 g (2.9 oz.)
EN 60730-2-9, EN 61010-1
R Tb
PTC
Description
Supply terminals
Output contacts
A2
A1
25
2x changeover/DPDT (AgNi/ Silver Alloy)
8 A / AC1
2000 VA / AC1, 192 W / DC
10 A /< 3 s
250 V AC1 / 24 V DC
500mW
3x107
0.7x105
A2
Ta
Ta-Tb
50 Ω - 1.5 kΩ
3.3 kΩ
1.8 kΩ
PTC temperature of motor winding
blinking red LED
< 5%
±5%
< 0.1 % / °C
Connection
28
26
Faulty states indication
Supply voltage indication
MEMORY function
Function TEST
RESET button
Ta
15
16
R
Tb
18
Output contacts
Terminals for sensor and reset
Note
Sensors could be in series in abide with conditions in technical specification - switching limits.
Warning!: In case of supply from the main, neutral wire must be connected to terminal A2.
Function
The device controls temperature of motor winding with PTC thermistor which is mostly placed in motor winding or very close to it. Resistance of PTC thermistor
run to max 1.5 kΩ in cold stage.
∞Ω
Ω
3.3 Ω
1.8 Ω
This device includes 2 thermostats in one. Thermostat has 2 thermo inputs, 2 outputs and individual temperature setting. It offers two possibilities of use. Firstly it can be used as two individual thermostats (e.g. for monitoring
two temperature levels of one device or as a control of individual devices), secondly it is possible to set depending function of both thermostats, when thermostat 2 blocks thermostat No.1 Advantage of this thermostats is a
wide temperature range - 40.. 110°C (-40 to 230 °F) (in one device) with very good mechanical accuracy of setting. It is due to 10-state switch for thermo ranges and its scale by 15°C (59 °F). VIt is possible to use fine tuning by
potentiometer by 0-15°C (32-59 °F) with accuracy ±1°C (34 °F). Device has in-built control of sensor fault (yellow LED). It is possible to set hysteresis 0.5 or 2.5 °C (32.9 or 37 °F).
It is possible to operate the thermostat only with one sensor. In that case it is necessary to connect a resistor 10 kΩ to the other input. This is included in the package.
• 1-MODULE, DIN rail mounting.
Ω
Ω
red LED
memory
PTC / TK
By temperature increase the resistance goes strongly up and by overrun the limit of 3.3 kΩ the contact of output relay switch off - mostly contactor controlling
a motor. By temperature decrease and thereby decrease of thermistor resistance under 1.8 kΩ the output contact of relay again switches on. The relay has
function “Control of sensor fault“. This controls interruption or disconnection of sensor.When switch is in position “TK” monitoring of faulty sensor is not
functional - it is possibel to connect bimetal sensor with only 2 states: ON or OFF. The device can work with bi-metal sensor in this position.
Other safety unit is function “Memory”. By temperature overrun (and output switches off ) the output is hold in faulty stage until service hit. This bring the relay
to normal stage (with RESET button) on front panel or by external contact (remote).
109
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