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Control Modes:
Automatic: On/Off, Proportional, PID,
PI, PD, PID + Fuzzy Logic, Heat/Cool
(Dual PID)
Control Adjustments:
Control Setpoint: Sensor Range
Setpoint Limits: Sensor Range
Deadband: 1 to 100°F
Proportional Band: Sensor Range
Manual Reset: 99.9 to 99.9
Automatic Reset: 0.00 to 99.99 repeats per minute
Rate: 0 to 500 seconds
Output Cycle Time: 0.1 to 60.0 seconds
Output Limit: 0.0 to 100.0%
Open Sensor/Out of Range Output Command: 0.0 to 100.0%
Display Offset: 100 to 100°F
Heat/Cool Adjustments:
Output Offsets: 0 to 100% of Proportional Band
Cooling Medium: Air, Water or Oil
Alarm Adjustments:
Setpoints: High and Low Settings for each Alarm Output
Alarm Types: Absolute: High, Low
and High/Low, Tracking: +Deviation,
Deviation, and ±Deviation
Relay Action: Latching or
Non-Latching, Energized
or De-Energized
Alarm Deadband: Adjustable,
0 to 100°F
Alarm Inhibit: On Power-Up, Enabled
or Disabled
Control/Alarm Outputs: Total of five (5) Control/Alarm outputs possible
Relay: Form A contacts, 1.0 Amps
at 120/230 Vac (resistive load)
Solid State Relay Drive: 24 Vdc nominal
at 40 mA
Triac: 1 Amp continuous, 10 Amp in-rush,
at 120 or 230 Vac
Current/Voltage: 4-20 mA into 0 to 800(omega), field changeable to 1-5Vdc
Output #5 (Optional):
Relay: N.O. Form C contact, 5A at 120 or
2.5 Amp 230 Vac
Sensor Input: Field selectable Thermocouple, RTD, Current or Voltage
Input Update Rate: 2 Samples per Second
Transmitter Power: ±24 Vdc, ±20%
@ 50 mA maximum
Ramp/Soak Programming:
Intervals: 16
Loops: 1 loop, 0-255 times or continuous
Event Outputs: Up to 3
Guaranteed Soak Differential:
Off, 1°F to sensor span
Time Units: Secs., Mins., Hours,
(1 sec. to 99.99 hours/segment)
Ramp to Setpoint:
1 to 9999°/hour on powerup
Open Sensor & Out-of-Range Condition: Programmable control action with display
indicating condition "OPEN SENS"
Remote Setpoint Input:
Input Signal: 4-20mA, 250(Ohm) Input Impedance, 1-5 Vdc, 110K(omega) Input Impedance, Voltage or Current Field Selectable via switch
Range: Programmable over selected
Sensor Span
Accuracy: ±0.3% of Sensor Span (initial
accuracy) at 75°F ambient temperature and rated line voltage, field calibrate to ±0.2%
of Sensor Span
Digital Input: Accepts dry-contact closure
Analog Output Option:
Assignable Functions: Process Variable, Output #1 Command, Active Setpoint,
Output #2 Command
Output Signal: 4-20 mA into 0-800(Ohm) load,
1-5 Vdc into 100K(omega) or greater load
Selectable via DIP switch
Range: Programmable over selected sensor span for retransmission of Process Variable
and Active Setpoint, fixed to 0 to 100% for transmission of output commands
Accuracy: ±0.2% of programmed span, ±1 LSD
Digital Communications (optional):
RS-232: Single-drop, isolated
RS-422/485: Multi-drop, isolated, field
selectable by switch
Baud Rates: 1200, 2400, 4800, 9600, 19.2K
Protocols: ASCII Line, Computer Interface
Instrument Power: 100 to 240 Vac, +10%, 15%; 12 to 24 Vac/Vdc, ±10%; 50 to 60 Hz
Operating Environment: 32 to 150°F (0 to 65°C) ambient temperature, relative humidity
<95%, non-condensing
Dimensions:
Overall: 3.78 x 3.78 x 4.75"
Depth Behind Panel: 4.00" (102 mm)
Front Panel Projection: 0.75" (19 mm)
Panel Cutout: 3.6 x 3.6" (92 mm x 92 mm)
Weight: 1 lb. (454g)
Case Material: High Impact, Black ABS Plastic
Front Panel: NEMA 4X Construction
Influence of Line Voltage Variation: ±0.1% of sensor span/10% change in nominal line voltage
Noise Rejection:
Common Mode Noise: 140dB at 60 Hz
Series Mode Noise: ±0.1% of Sensor Span
with 300 mV peak to peak, 50 or 60 Hz series mode noise
RFI: Typically less than 0.5% of sensor Span
at a distance of 1 meter (3.1 ft.) from transmitter (4W, 464Mhz)
| To Order (Specify Model Number) | ||
| Model Number | Price | Description |
| CN3251(*) | $350 | Ramp/soak controller with fuzzy logic |
Output Type for Single Output Model (No Add'l. Charge)
| Output #1 Type | Output Order Suffix |
| Relay/dc Pulse* | R |
| ac SSR | T |
| 4-20 mA** | F |
*field selectable
** field selectable for 1-5 Vdc
Accessories
| Model No. | Price | Description |
| 3250X-R | $40 | Relay/dc Pulse Output Module |
| 3250X-T | 40 | ac SSR Output Module |
| 3250X-FF* | 80 | 4-20 mA/4-20 mA Output Module |
| 3250X-RR | 80 | Relay/Relay Output Module |
| 3250X-TT | 80 | ac SSR/ac SSR Output Module |
| 3250X-DD | 80 | dc Pulse/dc Pulse Output Module |
| 3250X-FR* | 80 | 4-20 mA/Relay Output Module |
| 3250X-FT* | 80 | 4-20 mA/ac SSR Output Module |
| 3250X-DR | 80 | dc Pulse/Relay Output Module |
| 3250X-DT | 80 | dc Pulse/ac SSR Output Module |
| 3250X-SBKT | 30 | Side Mounting Bracket |
| CN3200-SOFT | 295 | Software for Communications Option |
| 1821-101 | 8 | Noise Suppression Kit (120 Vac) |
| 1821-102 | 8 | Noise Suppression Kit (240 Vac) |
*Field selectable for 1-5 Vdc.
Output Type For Dual Output Model
| Output #1 Type | Output #2 Type | Add'l. Cost | Output Order Suffix |
| Relay | Relay | $40 | RR |
| ac SSR | ac SSR | 40 | TT |
| 4-20 mA* | 4-20 mA* | 40 | FF |
| dc Pulse | dc Pulse | 40 | -DD |
| 4-20 mA* | Relay | 40 | -FR |
| 4-20 mA* | ac SSR | 40 | -FT |
| dc Pulse | Relay | 40 | -DR |
| dc Pulse | ac SSR | 40 | -DT |
*field selectable for 1-5 Vdc
Options
| Ordering Suffix | Price | Description |
| -LV* | $50 | 12-24 Vdc/Vac Power |
| -A* | 40 | Dual alarm/event relays (shared common terminal) |
| -S2Ý | 95 | RS232 digital communications, with one alarm/event relay |
| -S4Ý | 95 | RS422/485 digital communications, with one alarm/event relay |
| -PVÝ | 75 | Recorder output, 4-20 mA/1-5 Vdc |
| -S2-PVÝ | 115 | RS232 digital communications, one alarm/event relay and recorder output |
| -S4-PVÝ | 115 | RS422/485 digital communications, one alarm/event relay and recorder output |
*These options can be ordered with any model number.
Ý Only one of these options can be ordered at a time.
Input Types and Ranges
| Input Type | Range | Accuracy @ 77F ambient (all ±% of sensor span) |
| J Iron/Constantan | -73 to 760°C (-100 to 1400°F) | 0.2% |
| K CHROMEGA® / ALOMEGA® | -184 to 1316°C (-300 to 2400°F) | 0.2% |
| T Copper/ Constantan | -212 to 399°C (-350 to 750°F) | 0.4% for PV < -80°C or 0.2% for PV > -80°C |
| E CHROMEGA®/ Constantan | -73 to 593°C (-100 to 1100°F) | 0.2% |
| R Pt/13%Rh-Pt | -18 to 1760°C (0 to 3200°F) | 0.4% |
| S Pt/10%Rh-Pt | -18 to 1760°C (0 to 3200°F) | 0.4% |
| B Pt/30% Rh / Pt/6% Rh | 10 to 1816°C (50 to 3300°F) | 0.4% for PV > 538°C |
| RTD Pt, 385/ 100 ohm | -128 to 538°C(-200 to 1000°F)-73.3 to 482.2°C(-99.9 to 899.9°F) | 0.2% |
| 4-20 mA | Scalable (-500 to 5000) | 0.2% |
| 0-5 Vdc | Scalable (-500 to 5000) | 0.2% |
| 1-5 Vdc | Scalable (-500 to 5000) | 0.2% |
*Specify output code from Single or Dual Output Type tables.
Ordering Example: CN3251-FR-A-S2-PV, ramp and soak controller with a 4-20 mA heat output, relay cool output, alarm/event relay, RS232 digital communications, and recorder output, $350 + 40 +40 + 115 = $545.
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