Omron E5CN User Manual

67
Using Heater Burnout, Heater Short, and Heater Overcurrent Alarms Section 3-10
V Connecting Lines
Example: Using Two 200-VAC, 2-kW Heaters
The heater burnout current when there is a burnout at the common is as fol-
lows:
Heater burnout detection current = (10 + 5) / 2
≈ 7.5 [A]
The heater burnout current when there is a burnout at the load is as follows:
Heater burnout detection current = (10 + 0) / 2
≈ 5 [A]
To enable detection in either case, use 7.5 A as the heater burnout detection
current.
CT
CT
Load
200 V
10 A
10 A→
17.3 A→
200 V
200 V
Load
Normal
Product
To CT input
Product
To CT input
CT
CT
Load
200 V
10 A→
10 A→
200 V
200 V
Load
CT
CT
Load
200 V
5 A→
5 A→
200 V
200 V
Load
Burnout
Product
To CT input
Product
To CT input
Product
To CT input
Product
To CT input
Current when there is a burnout = 10 A × (1/2)
= 5 A
Burnout
Current when there is a burnout = 0 A

Omron E5CN Specifications

General

Communication	RS-485 (optional)
Mounting	Panel Mount
Control Method	ON/OFF
Input Type	Thermocouple, RTD
Supply Voltage	100 to 240 VAC
Output Type	Relay, Voltage (for driving SSR), Current
Display Type	7-segment LED
Size	48 x 48 mm
Control Output	Relay, Voltage (for driving SSR), Current
Alarm Output	1 or 2 outputs
Dimensions	48 x 48 x 78 mm
Ambient Operating Temperature	-10 to 55°C
Protection Rating	IP66