The CN2508 Series is part of a range of new
generation series of limit controllers that incorporate
numerous product specification, communication,
display interface and software improvements that
surpass competitive limit device offerings in ease of
use and programming.
By adding more versatile features and user-friendly
functionality like digital inputs, an easy-to-use HMI,
jumperless and auto-hardware configuration,
24 Vdc transmitter power supply and MODBUS®
communication across the range, the CN2508 limit
controller transform the complicated into the simple
while saving you time (as much as 50% on product
set-up), reducing inventory stock and virtually
eliminating the likelihood of operator errors.
The CN2508 limit controllers are affordable, wellfeatured,
easy to use and adaptable with performance
features that work for you to make limit control simple.
The CN2508 is a fail-safe protection device to prevent
damage to equipment or products. It will shut down a
process when a preset temperature is reached and
cannot be reset by the operator until the process has
returned to a safe condition.
SPECIFICATIONS Environmental Characteristics Operating Temperature: 32 to 131°F (0 to 55°C) Storage Temperature: -4 to 176°F (-20 to 80°C) Humidity: 20 to 95% non-condensing RH Electrical Supply Voltage: 100 to 240V, 50/60 Hz, optional 20 to 48 Vac 50/60 Hz or 22 to 65 Vdc Power Consumption: 5 W/7.5 VA maximum Inputs Thermocouples: J, T, K, L, N, B, R, S, C; Pt Rh 20% vs. Pt 40% Rh RTD: 3-wire, PT100 DC linear (scalable -1999 to +9999) Volts: 0 to 5V, 1 to 5V, 0 to 10V, 2 to 10V DC Milliamps: 0 to 20 mA or 4 to 20 mA DC Millivolts: 0 to 50 mV, 10 to 50 mV OUTPUTS Output 1: (Limit relay) fixed Outputs 2 and 3: (Alarm relay) are user-selectable and customized based on desired application Choose From the Following Output Types Max # of Outputs: 3 for alarm, 24 Vdc transmitter power supply or retransmit of process value/limit trip setpoint Limit Relay: SPDT; 240 Vac, 5 A resistive; lifetime >100,000 operations at rated voltage/current Alarm Relay: Optional SPDT; 240 Vac, 2 A resistive; lifetime >500,000 operations at rated
voltage/current SSR Drive (Optional Drive Capability): >10 Vdc nominal into 500 Ω minimum DC Linear: Optional 0 to 20 mA, 4 to 20 mA
into 500 Ω max; 0 to 10V, 1 to 5V, 2 to 10V, 0 to 5V into 500 Ω min; outputs have 2% over/under drive applied; accuracy ±0.25% (mA into 250 Ω load, V into 2k Ω load); degrading linearity to ±0.5% for increasing burden to specified limits Triac: Optional 0.01 to 1A AC, 20 to 280 Vrms, 47 to 63 Hz (limit 2) Transmitter Power Supply: Optional 24 Vdc (limit 1) Output Functions Process Alarm: Reverse or direct Modes (Alarm 1 and 2): High/low, band, deviation, logical OR/AND Retransmit: Process value or limit setpoint Electrical Performance Accuracy: ±0.1% of input range ±1 LSD (thermocouple CJC better than 1°C) Input Sample Rate: 4 per second, 14-bitresolution Impedance: >10M Ω for the thermocouple and mV ranges, 47 kΩ for V ranges and 5 Ω for mA ranges Sensor Break Detection: <2 seconds (except zero based DC ranges), limit output opens, low alarms activate for RTD, mA or V ranges Communications Interface User-Selectable: 2-wire, RS485 serial communications option with choice of MODBUS RTU or ASCIIprotocol; 1200 to 19200 baud PC Configuration: Offline configuration from serial port to dedicated configuration socket (comms option not required) Protection IEC IP66 (NEMA 4X): Front panel IEC IP20: Behind the panel protection Dimensions Panel Cutout: 45 W x 92 mm H (1.77 x 3.62") Height: 96 mm (3.77") Width: 48 mm (1.89") Depth: 100 mm (3.94") Weight: 0.21 kg (0.46 lb) Mounting: Plug in panel with fixing strap
† All dollar amounts on this site are shown in US currency.
Note: Comes complete with mounting bracket and operator’s manual.
Keywords:1/8 DIN Temperature/Process Limit Controllers
