Omron E5CN User Manual page 47

Wiring Terminals
Control Output 2
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 Break Alarm (LBA) and HS alarm that are provided for the E5@N.)
Long-life
relay output
1
Varistor
2
Select a surge absorber that satisfies the following conditions.
Voltage used
100 to 120 VAC
200 to 240 VAC
• Outputs are sent from terminals 11, 12, 14, and 15 with the E5CN, and
from pins 14 and 15 with the E5AN/EN. The following diagrams show the
available outputs and their internal equalizing circuits.
v
+
or
L
GND
GND
Voltage Voltage
E5CN
• The following table shows the specifications for each output type.
E5CN/CN-U
Output type
Voltage (PNP) PNP type, 12 VDC 15%, 21 mA (with short-circuit protec-
tion)
E5AN/EN
Output type
Long-life relay 250 VAC, 3 A (resistive load), electrical durability: 1,000,000
operations
Voltage (PNP) PNP type, 12 VDC +15%/ 20%, 21 mA (with short-circuit
protection)
• Always connect an AC load to a long-life relay output. The output will not
turn OFF if a DC load is connected.
• A voltage output (control output) is not electrically isolated from the inter-
nal circuits. Therefore, when using a grounding thermocouple, do not con-
nect any of the control output terminals to the ground. If control output
terminals are connected to the ground, errors will occur in the measured
temperature values as a result of leakage current. With E5AN/EN, how-
ever, voltage output (control output 2) is functionally isolated from the
internal circuits.
• The control output 2 of E5CN is a voltage output only, and outputs across
terminals 11(+) and 12(-), or 14(+) and 15(-).
• Control outputs 1 and 2 (voltage outputs) are not isolated.
Varistor
Inductive
load
Varistor voltage
240 to 270 V
440 to 470 V
v
+
L
Relay
Specifications
Specifications
Section 2-2
Surge resistance
1,000 A min.
v
+
L
GND
Voltage
E5AN/EN
25