L91

48 x 48 mm Safety limit controller

More details

New product
 
More info

The limit control L91 is an over temperature or a high limit safety device with a latching output that could remove the power while the process is in abnormal condition, for example the process higher than high limit set point or lower than the low limit set point.

As a professional and experienced manufacturer, we supply high-performance and quality temperature controllers, which are also called temperature control, electronic temperature control, electronic temperature controller, and PID controller.

 
Specification
Power 
90 - 250 VAC, 47 - 63 Hz, 10VA, 5W maximum
11 - 26 VAC / VDC, SELV, Limited Energy, 10VA, 5W maximum

Signal Input Characteristics 
Resolution 18 bits
Sampling Rate 5 times / second
Maximum Rating -2 VDC minimum, 12 VDC maximum( 1 minute for mA input )
Temperature Effect ±1.5 uV/ °C 
Sensor Lead Resistance Effect T/C: 0.2uV/ohm
3-wire RTD: 2.6 °C/ohm of resistance difference of two leads
2-wire RTD: 2.6 °C/ohm of resistance sum of two leads
Burn-out Current 200nA
Common Mode Rejection Ratio ( CMRR )  120dB
Sensor Break Detection Sensor open for TC, RTD and mV inputs,
below 1 mA for 4-20 mA input,
below 0.25V for 1 - 5 V input, unavailable for other inputs.
Sensor Break Responding Time Within 4 seconds for TC, RTD and mV inputs,
0.1 second for 4-20 mA and 1 - 5 V inputs.

Characteristics
Type Range  Accuracy@ 25 °C Input Impedance
J -120 ~ 1000 °C (-184 ~ 1832 °F) ±2 °C 2.2MΩ
K -200 ~ 1370 °C (-328 ~ 2498°F) ±2 °C 2.2MΩ
T -250 ~ 400°C (-418 ~ 752°F) ±2 °C 2.2MΩ
E -100 ~ 900 °C (-148 ~ 1652 °F) ±2 °C 2.2MΩ
B 0 ~ 1820 °C (32 ~ 3272 °F) ±2 °C (200°C - 1820°C) 2.2MΩ
R 0 ~ 1767.8 °C (32 ~ 3214 °F) ±2 °C 2.2MΩ
S 0 ~ 1767.8 °C (32 ~ 3214 °F) ±2 °C 2.2MΩ
N -250 ~ 1300 °C (-418 ~ 2372 °F) ±2 °C 2.2MΩ
L -200 ~ 900 °C (-328 ~ 1652 °F) ±2 °C 2.2MΩ
PT100 (DIN) -210 ~ 700 °C (-346 ~ 1292 °F) ±0.4°C 1.3KΩ
PT100 (JIS) -200 ~ 600 °C (-328 ~ 1112 °F) ±0.4°C 1.3KΩ
mV -8 ~ 70mV ±0.05% 2.2MΩ
mA -3 ~ 27mA ±0.05% 70.5Ω
V -1.3 ~ 11.5V ±0.05% 510KΩ

Event Input  
Logic Low Logic -10V minimum, 0.8V maximum.
Logic High 2V minimum, 10V maximum.
Functions Remote reset, remote lockout.

Output 1 / Output 2  
Relay Rating 2A/240 VAC, life cycles 200,000 for resistive load
Pulsed Voltage Source Voltage 5V, current limiting resistance 66Ω

Triac ( SSR ) Output  
Rating 1A / 240 VAC
Inrush Current 20A for 1 cycle
Min. Load Current 50 mA rms
Max. Off-state Leakage 3 mA rms
Max. On-state Voltage 1.5V rms
Insulation Resistance 1000 Mohms min. at 500 VDC
Dielectric Strength 2500 VAC for 1 minute

DC Voltage Supply Characteristics ( Installed at Output 2 )
Type Tolerance Max. Output Current  Ripple Voltage Isolation Barrier
20V ±1 V 25 mA 0.2 Vp-p 500 VAC
12V ±0.6 V 40 mA 0.1 Vp-p 500 VAC
5V ±0.25 V 80 mA 0.05 Vp-p 500 VAC

Data Communication  
Interface RS-232 ( 1 unit ), RS-485 ( up to 247 units )
Protocol  Modbus Protocol RTU mode
Address 1 - 247
Baud Rate 0.3 ~ 38.4 Kbits/sec
Data Bits 8 bits
Parity Bit None, Even or Odd
Stop Bit 1 or 2 bits
Communication Buffer 50 bytes

User Interface  
4-digit LED Displays 0.4" (10mm),
Keypad 4 keys
Programming Port  For automatic setup, calibration and testing
Communication Port Connection to PC for supervisory control

Limit Control  
High Limit, Low Limit and High/Low Limit programmable

Digital Filter  
Function First order
Time Constant  0, 0.2, 0.5, 1, 2, 5, 10, 20, 30, 60 seconds programmable

Environmental & Physical  
Operating Temperature -10°C ~ 50°C
Storage Temperature -40°C ~ 60°C
Humidity 0 to 90 % RH ( non-condensing )
Insulation Resistance 20 Mohms min. ( at 500 VDC )
Dielectric Strength 2000 VAC, 50/60 Hz for 1 minute
Vibration Resistance 10 - 55 Hz, 10 m/s² for 2 hours
Shock Resistance 200 m/s2( 20 g )
Moldings Flame retardant polycarbonate
Dimensions 48mm(W) X 48mm(H) X 94mm(D), 86 mm depth behind panel
Weight  150 grams

Approval Standards
Safety FM Class 3545 (Oct. 1998), UL873 ( 11'th edition, 1994 ) , CSA C22.2 No. 24-93 , EN61010-1 (IEC1010-1)
Protective Class IP30 front panel, indoor use,
IP20 housing and terminals ( with protective cover)
EMC EN61326

Contact Us

“Industrial Technical Services is a single source Instrumentation and Automation company. We provide certified calibrations, PLC programming, custom controls and Panels”.

 

Please fill details below and one of our representative will contact you shortly. 

30 other products in the same category: