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HomeProducts Temperature Controllers Zesta Controllers ZEL-L91 / ZEL-L41

ZEL-L91 / ZEL-L41

48mm X 48mm & 96mm X 96
ZEL-L91
ZEL-L91
The ZEL-L91 / ZEL-L41 is a microprocessor-based limit controller designed for the protection of equipment from high and/or low temperatures.

A latching relay cuts power to the process if safe values are exceeded. The controller must be reset before the process continues.

The limit controller’s universal input will accept thermocouple (types J, K, T, E, B, R, S, N, L, C, P), RTD (PT100 DIN, PT100 JIS) and 0~60mV. Other inputs types are also available: voltage (0-1, 0-5, or 0-10 VDC), and milliamperes (0-20 mA).

The controller also comes equipped with a 2 Amp form C relay as the limit control output, with optional RS-232 or RS-485 communications, retransmit, or event input.
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Features
Specifications
Ordering information
Resources
Applications

Product Features

  • Fast Sampling Rate of 200 ms
  • Universal Input
  • High or Low or High/Low Limit
  • Normal/Latching Alarm Output
  • Limit Annunciator
  • Remote Reset / Remote Lock via Event Input
  • PV/SP Retransmission
  • Connect with HMI for Alarm Monitoring
  • Network up to 247 Controllers on RS-485 Modbus
  • FM, UL, CSA, CE, RoHS, REACH Approval
  • Available in ¼ DIN and 1/16 DIN Size

Product Specifications

Power:
  • 90 - 250 VAC, 47 - 63 Hz, 10VA, 5W maximum
  • 11 - 26 VAC / VDC, SELV, Limited Energy, 10VA, 5W maximum
Signal Input:
  • Thermocouple: Types J, K, T, E, B, R, S, N, L
  • RTD: PT100 (DIN), PT100 (JIS)
  • mV: -8 ~ 70mV
  • mA: -3 ~ 27mA
  • V: -1.3 ~ 11.5V
  • 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 for all inputs except mA, input ±3.0 uV/ °C for mA input
  • 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 200nA
  • Common Mode Rejection Ratio (CMRR): 120dB
  • Normal Mode Rejection Ratio (NMRR): 55dB
  • 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.
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
Communications:
  • 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