Omega Products CN7833 User Manual

1

U

⁄16 DIN Ramp/Soak

Controllers

CN7800 Series

U Dual Display
U Autotune
U Universal Input
U

8 Ramp/Soak Programs,
8 Segments Each

U

Programmable Repeat and
Linking Features

U RS485 Communications
U Free Software
U 2 Alarm Standard

Monitor and control temperature or process applications
with precision using the CN7800 Series controllers. The
CN7800 Series provides dual LED displays for local
indication of process value and setpoint value. Control
methods include on/off, PID, auto-tune and manual-tune.
PID control is supported with 64 ramp/soak control
actions. Two additional alarm outputs are standard on
the CN7800 Series. The alarm outputs can be quickly
configured by using the 13 built-in alarm functions. The
controller communicates easily with the built-in
RS485 interface.

Inputs

Input Types Range

-200 to 1300°C (-328 to 2372°F)

-100 to 1200°C (-148 to 2192°F)

-200 to 400°C (-328 to 752°F)
0 to 600°C (32 to 1112°F)

-200 to 1300°C (
0 to 1700°C (32 to 3092°F)
0 to 1700°C (32 to 3092°F)
100 to 1800°C (212 to 3272°F)

-200 to 850°C (-328 to 1562°F)

Pt100 RTD -200 to 600°C (-328 to 1112°F)
0 to 50 mV -999 to 9999
0 to 5 V -999 to 9999
0 to 10 V -999 to 9999
0 to 20 mA* -999 to 9999
4 to 20 mA* -999 to 9999

Requires external 250 Ω precision shunt resistor, OMX-R250

*

(sold separately). Available at omega.com/cn7800

-200 to 500°C (-328 to 932°F)

-328 to 2372°F)

Panel punches

available, visit

omega.com/

panelpunches

CN7833

Specifications

Inputs: Thermocouple, RTD, DC voltage or DC current
Display: Two 4-digit, 7 segment 6.35 mm H (0.25”)

LEDs (PV: red, SV: green)
Resolution: 1.0, 0.1 for thermocouples

(except Types R, S and B)

Accuracy: ±0.25% span, ±1 least significant digit
Supply Voltage: 100 to 240 Vac, 50/60 Hz
Power Consumption: 5 VA max
Operating Temperature: 0 to 50°C (32 to 122°F)
Memory Backup: Non-volatile memory
Control Output Ratings:
Relay: SPST, 5 A @ 250 Vac resistive
Voltage Pulse: 14V, 10 to -20% (max 40 mA)
Current: 4 to 20 mA
Alarms: SPST, 3 A @ 250 Vac resistive
Communication: RS485 MODBUS

communication protocol

Weight: 114 g (4 oz)
Front Bezel: 48 mm
Panel Cut-Out: 45 mm
Maximum Panel Thickness: 9.50 mm (0.375")
Panel Depth: 80 mm (3.15")

To Order

Model No. Description
CN7833 Dual output, relay/relay,

CN7823 Dual output, DC pulse/relay,

CN7853

Free CN7-A software download available at omega.com/cn7800

*

Accessories (Field Installable)
Model No. Description
CNQUENCHARC Noise suppression RC snubber

OMX-R250 250 Ω precision resistor
CN7-485-USB-1 RS485 to USB mini-node

Comes complete with operator’s manual.
Ordering Examples: CN7823, dual-output controller, DC pulse,

mechanical relay output, and RS485 communications.
CN7853, dual output 4 to 20 mA relay two alarms.

2

(1.89 in2)

2

(1.77 in2)

Visit omega.com/cn7800 for Pricing and Details

2 alarms, RS485*

2 alarms, RS485*
Dual output, 4 to 20 mA/relay,

2 alarms, RS485*

(2 leads), 110 to 230 Vac

converter

®

A-5-11/RTU

P-49