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Jumo Safety Temperature Limiter / Monitor STB/STW
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STB/STW – Safety Temperature Limiter and Safety Temperature Monitor (701150)

Brand:

Safety Temperature Limiter/Monitor (O-function), 2 x Pt100 Inputs, 4~20mA Output.

$1,630.00 Excl. GST

Voltage Supply Option *

Jumo Code: 701150/8-02-0253-2001-23/005,058

Jumo Code: 701150/8-02-0253-2001-25/005,058

Total: $1,630.00

All prices are in NZ$, and GST exclusive and are subject to change without notice.

Product Details

Description 

The safety temperature limiter (STB) and safety temperature monitor (STW) enable early and reliable detection of risks which could potentially result in personal injuries, environmental damage, or destruction of the production plant and production materials.

Its primary task is to reliably monitor thermal processes and to switch plants to a safe operating status in the event of malfunctions.

The measured value at the analog input can be recorded by various probes or standard signals. Limit value exceedance is indicated by the installed LED K1 and K2 (red) for each channel and the integrated alarm relay output switches the plant to safe operating status (alarm range).

Safety temperature monitor (STW)
Protective temperature monitor with automatic reset for heat-generating plants. An automatic reset occurs upon activation after the probe temperature has risen or fallen above/below the set limit value by the amount of the switching differential.
(Modes of operation 2B, 2K, and 2P)

Safety temperature limiter (STB)
Protective temperature limiter for heat-generating plants that can only be reset manually or with a tool.
(Functions 2B, 2J, 2 V, 2K, 2P and adjustable with special tool)

STB/STW Features 

  • Can be configured as safety temperature limiter (STB) or safety temperature monitor (STW)
  • 1oo2D architecture
  • Approvals for DIN EN 14597, SIL, PL (Performance Level), UL
  • Two relay outputs can be used as pre-alarm or limit value alarm
  • Pre-alarm absolute or adjustable as a margin from the limit value
  • LCD display with background lighting and plain text display
  • Setup program for configuration and archiving via USB interface
  • Wide voltage supply range from 110 to 240 V +10 %/-15 % or ACDC 20 to 30 V
  • Internal and external unlocking possible

Technical Specs

Analog inputs

RTD temperature probe

Designation  Measuring range  Accuracy
2/3-wire circuit1 		 Ambient temperature error 
Pt100 DIN IEC 60751:2008 -200 to +850 °C 0.5 %/0.1 % 50 ppm/K
Pt1000 DIN IEC 60751:2008 -200 to +850 °C 0.5 %/0.1 % 50 ppm/K
Connection type Maximum lead wire resistance 2-wire circuit 15 Ω, 3-wire circuit 30 Ω
Sampling rate 210 ms
Error tolerance time ≤ 5 s: time taken into account for all diagnostic tests
Input filter Digital filter, 2nd order; filter constant can be set from 0 to 100 s
Special features Single probe Pt100 2-wire, display can also be programmed in °F

Thermocouples

Designation  Measuring range  Accuracy1  Ambient temperature
influence 
Fe-CuNi “L” DIN 43710: 1985-12 -200 to +900 °C 0.4 % 100 ppm/K
Fe-CuNi “J” DIN EN 60584-1:1996-10 -200 to +1200 °C 0.4 % 100 ppm/K
Cu-CuNi “U” DIN 43710:1985-12 -200 to +600 °C 0.4 % 100 ppm/K
Cu-CuNi “T” DIN EN 60584-1:1996-10 -200 to +400 °C 0.4 % 100 ppm/K
NiCr-Ni “K” DIN EN 60584-1:1996-10 -200 to +1372 °C 0.4 % 100 ppm/K
Pt10Rh-Pt “S” DIN EN 60584-1:1996-10 -50 to +1768 °C 0.4 % 100 ppm/K
Pt13Rh-Pt “R” DIN EN 60584-1:1996-10 -50 to +1768 °C 0.4 % 100 ppm/K
Pt30Rh-Pt6Rh “B” DIN EN 60584-1:1996-10 0 to 1820 °C 0.4 %2 100 ppm/K
NiCrSi-NiSi „N“ DIN EN 60584-1:1996-10 -100 to +1300 °C 0.4 %2 100 ppm/K
W3Re-W25Re “D”ASTM E1751M-09 (bis 2315 °C): 2009 0 to 2495 °C 0.4% 100 ppm/K
W5Re-W26Re „C“ ASTM E230M-11: 2011 0 to 2315 °C 0,4% 100 ppm/K
Cold junction Pt100 internal
Cold junction accuracy ±1 K
Sampling rate 210 ms
Error tolerance time ≤ 5 s: time taken into account for all diagnostic tests
Input filter Digital filter, 2nd order; filter constant can be set from 0 to 100 s

1. The accuracy refers to the maximum extent of the measuring range.
2. The accuracy is garanteed above 300° C

Direct current

Measuring range  Accuracy  Ambient temperature influence 
4 to 20mA, voltage drop < 2 V 0.2 % 150 ppm/K
Scaling Can be freely programmed within the limits
Sampling rate 210 ms
Error tolerance time ≤ 5 s: time taken into account for all diagnostic tests
Input filter Digital filter, 2nd order; filter constant can be set from 0 to 100 s
Special features Single probe 4 to 20 mA

Analog output

Signal type  Accuracy  Residual ripple  Load influence  Temperature influence  Load resistance 
Current 4 to 20 mA ≤ 0.5 % ± 0.5 % at 300 Ω ± 0.05 mA/100Ω 150 ppm/K ≤ 500 Ω
0 to 20 mA
Voltage 2 to 10 V ≤ 0.5 % ± 0.5 % ± 15 mV 150 ppm/K ÷ 500 Ω
0 to 10 V

Binary input

Connection Function
1 floating contact Unlocking, key inhibit, level inhibit can be configured

Relay outputs

Relay output KV Relay (changeover contact) without contact protection
30000 switching operations at a switching capacity of 250 V, 3 A, 50 Hz (resistive load)
or up to DC 30 V, 3 A. Minimum current DC 12 V, 100 mA.
Relay output alarm Relay (changeover contact)
Contact protection circuit: fuse cut-out 3.15 AT, installed in the pole contact arm
30000 switching actions at a switching capacity of 230 V, 3 A, 50 Hz (resistive load)
or up to DC 30 V, 3 A. Minimum current DC 12 V, 100 mA.

Measuring circuit monitoring

RTD temperature probe in 3-wire circuit and double thermocouples Thermocouples Current 4 to 20 mA
Overrange and underrange Is detected
LED K1, K2, KD, and KV are lit;
“>>>>“ flashes in the display for overrange, “<<<<“ for underrange.
Probe/cable break Is detected
LED K1, K2, KD, and KV are lit
“>>>>“ flashes in the display; relay output alarm is inactive		 LED K1, K2, KD, and KV are lit;
“>>>>“ flashes in the display; relay output alarm is inactive
Probe short circuit Is detected
LED K1, K2, KD, and KV are lit
“<<<<“ flashes in the display; relay output alarm is inactive		 Is detected by difference monitoring of the analog inputs LED K1, K2, KD, and KV are lit;
“<<<<“ flashes in the display; relay output alarm is inactive

Voltage supply

Voltage supply AC/DC 20 to 30V, 48 to 63 Hz AC 110 to 240V +10% /-15%, 48 to 63 Hz
Power consumption, Power loss max. 12 W max. 12 W
Power consumption, Power loss
for the following mode:
Analog output 10mA; background lighting Display off; Relay output “Alarm” on;
Relay output pre-alarm off; Sensor: 2xPt100		 5W 5W

Test voltages according to EN 60730, part 1

Input and output against voltage supply
– At voltage supply AC 110 to 240 V +10 % / -15 % 3.7 kV/50 Hz
– At voltage supply AC/DC 20 to 30 V, 48 to 63 Hz 3.7 kV/50 Hz

Electrical safety

Clearances / creepage distances
Mains voltage to electronic components and probes ≥ 6 mm / ≥ 8 mm
Mains voltage to the relay ≥ 6 mm / ≥ 8 mm
Relay to electronic components and probes ≥ 6 mm / ≥ 8 mm
Electrical safety According to DIN EN 14597 (DIN EN 60730-2-9)
Overvoltage category III, pollution degree 2
Protection rating I With internal separation to SELV electrical circuits

Environmental influences

Ambient temperature range 0 to +55 °C
Storage temperature range -30 to +70 °C
Temperature influence ≤ ± 0.005 % / K dev. from 23 ×C1 for RTD temperature probe
≤ ± 0.01 % / K dev. from 23 ×C1 for thermocouple, current
Terminal temperature Range If the temperature range of -10 °C to +80 °C is exceeded or undercut, the device shows the error
message “Terminal temperature Range“.
The output changes to a safe state (quiescent current principle).
The message can only be acknowledged, if the temperature is back again in the valid range.
Resistance to climatic conditions 85 % rel. humidity without condensation
(3K3 with extended temperature range according to DIN EN 60721-3-3)
EMC According to DIN EN 14597 and standards from the standard series DIN EN 61326
Interference emission Class B
Interference immunity Evaluation criteria FS according to DIN EN 14597, regulation and control devices (RS)

1. All specifications refer to the measuring range end value

Case

Material Polycarbonate
Flammability class UL 94 V0
Electrical connection On the front via screw terminals up to 2.5 mm2
Installation On 35 mm DIN rail acc. to EN 60715
Installation position vertical
Weight Approx. 230 g
Protection type IP 20 acc. to EN 60529

Approvals/approval marks

Approval marks  Testing agency  Certificates/certification numbers  Inspection basis  Valid for 
DIN DIN CERTCO STB/STW1223 DIN EN 14597 All device versions:
SIL2, SIL3 TÜV Nord (German Technical Inspection Agency) SEBS-A.102606/16-2 V1.0 DIN EN 61508 Devices with extra code 058
PL e DIN EN ISO 13849-1
c UL us Underwriters Laboratories E325456-20120611 UL 60730-2-9 submitted All device versions:
DNV·GL DNV·GL TAA000017J Devices with extra code 062
Pressure Equipment
Directive		 TÜV Süd (German Technical Inspection Agency) 07 202 1045 Z 0031/14/D0046 Pressure Equipment Directive 97/23/EG All device versions:

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