Omron E5AN User Manual

38
Wiring Terminals Section 2-2
E5AN/EN
E5GN
• Always connect an AC load to a long-life relay output. The output will not
turn OFF if a DC load is connected.
• The voltage output (for driving SSR) is not electrically isolated from the
internal circuits. When using a grounding thermocouple, do not connect
any of the control output terminals to the ground. If a control output termi-
nal is connected to the ground, errors will occur in the measured tempera-
ture as a result of leakage current.
• Control output 1 (voltage output for driving SSR) and control output 2
(voltage output for driving SSR) are not isolated. For the E5AN/EN, how-
ever, the internal circuits are functionally isolated.
• Long-life relay outputs use semiconductors for switching when closing
and opening the circuit, thereby reducing chattering and arcing and
improving durability. However, if high levels of noise or surge are imposed
between the output terminals, short-circuit faults may occasionally occur.
If the output becomes permanently shorted, there is the danger of fire due
to overheating of the heater. Design safety into the system, including
measures to prevent excessive temperature rise and spreading of fire.
• Take countermeasures such as installing a surge absorber. As an addi-
tional safety measure, provide error detection in the control loop. (Use the
Loop Burnout Alarm (LBA) and HS alarm that are provided for the E5@N.)
Select a surge absorber that satisfies the following conditions.
Output type Specifications
Relay 250 VAC, 5 A (resistive load), electrical durability: 100,000
operations
Voltage (for driv-
ing SSR)
PNP type, 12 VDC +15%, 40 mA (with short-circuit protec-
tion)
Current DC 4 to 20 mA/DC 0 to 20 mA, resistive load: 600 Ω max.
Resolution: Approx. 10,000
Output type Specifications
Relay 250 VAC, 2 A (resistive load), electrical durability: 100,000
operations
Voltage (for driv-
ing SSR)
PNP type, 12 VDC ±15%, 21 mA (with short-circuit protec-
tion)
Current DC 4 to 20 mA/DC 0 to 20 mA, resistive load: 500 Ω max.
Resolution: Approx. 10,000
Voltage used Varistor voltage Surge resistance
100 to 120 VAC 240 to 270 V 1,000 A min.
200 to 240 VAC 440 to 470 V
1
2
Long-life
relay output
Varistor
Varistor
Inductive
load

Omron E5AN Specifications

General

Brand	Omron
Model	E5AN
Category	Temperature Controller
Language	English