Limit,Controllers

Limit Controllers from Heaters Controls And Sensors



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1 800 279-9912
 
Limit Controllers from Heaters Controls And Sensors

These FM approved Limit Controllers will shut down the process by disconnecting power from the process if the controller reads a value above setvalue for a Hi Limit Controller or below set point if configured as a low limit control.

These Limit Controllers will remain in this state until the temperature has dropped below the set value and the reset button has been pressed. The control also has a timer to indicate the total time the setpoint is exceeded
i.e. (duration of over temperature) it also has a register that will indicate the maximum temperature reached. Field programmable Low / High Process alarms and deviation alarms or band alarms are an option.


Limit Controllers Features:

FM approved Limit Controllers
Compact economical 1 / 16 DIN size

Easy to use yet powerful

Time of over temperature condition indication
User selectable as a high or low limit
Universal Inputs, Timer, Register, Retransmission, Communication
NEMA 4 IP65 Front Panel


Limit Controllers Specifications:

INPUT
Programmable. . . . . . Thermocouple, J K T R B S L N
                       RTD, PT 100
                       mV, 0-50mV DC
                       VDC, 0-5VDC 1-5VDC, 0-lOVDC, 2-lOVDC
                       mA, 0-20mA 4-20mA
           Remote Reset Input Voltage free contact
closure required for reset     Input sampling rate 0.25s OUTPUTS Output 1. . . . . . .Limit Relay SPDT 5Amp at 120/240 VAC resistive Output 2. . . . . . .Alarm/Annunciator SPDT 2A  120/240 VAC resistive Output 3. . . . . . .DC Linear ( recorder ) 0-20mA 4-20mA 0-l OV 0-5V                      SPDT relay 2A resistive 120/240 VAC OUTPUT. . . . . . . .Limit Control Output Output type selection The output type (high limit type or Low limit type) is selectable
by the user via dip switch Accuracy. . . . . . . .+ -0.3%(of output span) Noise-rejection ratio. Normal Mode 40dB (50/60Hz)                        Common mode 120dB(50/60Hz) Retransmission output (Optional specifications RET) ALARMS. . . . . . . . .Two soft alarms up to two outputs can be used
for alarms Combination Alarms. . .Logical OR or AND of alarms to an individual
hardware output COMMUNICATION Baud rate. . . . . . . 1200,2400,4800,9600 BPS Type. . . . . . . . . .Serial asynchronous UART to-UART link RS 485 Max # of zone. . . . . 32 Physical Layer. . . . .RS 485 Operating Temp. . . . .0 to 55 deg C RH. . . . . . . . . . .20% - 95% nn condensing Supply Voltage. . . . .90 - 264 VAC 50/60 Hz or 22-50 VDC ( Optional ) Accuracy. . . . . . . .+/- .25% of span +/- LSD Dimensions. . . . . . .48 X 48 X 100 mm

 

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