Page 1
High-Limit Temperature Controller
CN3261 Series
FM
APPROVED
U Protects Processes
and Equipment From
Excessive Temperatures
U DIN Rail and Sub-Panel
Mounting
U J, K Thermocouple
or RTD Input
U Terminals Provided for
Remote Pushbutton Reset
U Latching, Normally
Energized, 3 A
Relay Output
The CN3261 Series high-limit
controller protects expensive
heaters and sensitive materials
from damaging due to temperature
conditions. Units are designed
for industrial and commercial
applications that require hightemperature protection. The CN3261
features a Form “C” latching,
manually resettable relay output
that de-energizes whenever the
sensed temperature exceeds the
setpoint temperature.Two methods
are provided to reset an alarm
condition, 1, the limit alarm has a
reset pushbutton on the unit and
2, reset terminals are provided for
resetting the alarm from a remote
pushbutton. The DIN rail mounting
feature allows quick installation
without drilling or extra hardware.
Slots are also provided for direct
panel mounting.
Specifications
Sensor Inputs:
J Thermocouple: 0 to 750°C
(0 to 1400°F)
K Thermocouple: -18 to 1260°C
(0 to 2300°F)
RTD: -18 to 454°C (0 to 850°F)
2-wire input
Control Output: SPDT relay rated
3.8 A resistance and 1.5 A pilot duty
120 Vac, 100,000 cycles
Control Mode: Latching with manual
reset or power-off
Reset Function: Integral reset switch
standard; terminals available for
optional remote reset switch
Set Point Adjustment:
Local SP dial adjustment
Control Stability: Typically less than
±5µV/°F ambient and 0.1% of SPAN/%
rated line voltage
Set Point Accuracy:
±3% FS maximum at 25°C and rated
line voltage
Sensor Break Protection: Contacts
4 and 5 open for thermocouple or
RTD break
Ambient Operating Temperature:
0 to 60°C (32 to 140°F)
Noise Rejection:
Common Mode Rejection: 60 db
Series Mode Rejection: 120 db
Power Input:
120 Vac or optional 24 Vac ±15%,
50/60 Hz, 3 VA maximum standard
Enclosure Material: Noryl, black color
Field Terminations: Screw terminals
with wire clamping plates and
touch-safe shield
Mounting: 35 mm DIN rail or
surface mounting
Mounting Screw Holes: Upper left,
lower right (2.5" c-c W and 3.0 c-c H)
for #6 screws
Dimensions: 76 H x 84 W x 64 mm D
(3.0 x 3.3 x 2.5") [overall 84 mm H (3.31")
for mounting]
CN3261-JF shown actual size.
To Order
Model No. Description
CN3261-JF Limit controller, J thermocouple -18 to 760°C
(0 to 1400°F)
CN3261-KF Limit controller, K thermocouple -18 to 1260°C
(0 to 2300°F)
CN3261-RTDF Limit controller, RTD -18 to 454°C (0 to 850°F)
CN3261-JC Limit controller, J thermocouple 0 to 750°C
(0 to 1400°F)
CN3261-JF-LV Limit controller, J thermocouple 0 to 750°C
(0 to 1400°F), low power
Comes complete with operator’s manual.
Ordering Examples: CN3261-RTDF, limit controller with -18 to 454°C (0 to 850°F) RTD input.
OCW-3, OMEGACARESM extends standard 1-year warranty to a total of 4 years.
CN3261-JF, limit controller, J thermocouple.
P
P-100
Loading...