H3CR-A8E 100-240VAC/100-125VD Omron, H3CR-A8E 100-240VAC/100-125VD Datasheet - Page 49

• Manufacturer Part Number: H3CR-A8E 100-240VAC/100-125VD
• Description: Solid State Timer
• Manufacturer: Omron

Specifications of H3CR-A8E 100-240VAC/100-125VD

• Contact Configuration: SPDT
• Nom Input Voltage: 240VAC
• Timing Adjustment: Knob
• Relay Mounting: DIN Rail

H3CR
Precautions (H3CR-A)
Note: The undermentioned is common for all H3CR-A models.
For the power supply of an input device of the H3CR-Aj/-AjS/-AP,
use an isolating transformer with the primary and secondary wind-
ings mutually isolated and the secondary winding not grounded.
Example: H3CR-A
The H3CR-Aj/-AjS/AP’s power supply terminal 2 is a common
terminal for input signals to the Timer. Do not disconnect the wires
on terminal 2, otherwise the internal circuitry of the Timer will be
damaged.
Make sure that the voltage is applied within the specified range,
otherwise the internal elements of the Timer may be damaged.
Power Supplies
G,
5, 6, 7
S,
Input device
R
2
Input
terminal
H3CR-A
Input terminal
5, 6, 7
G, S, R
10
2
Isolation transformer is required.
H3CR-A
10
2
Power supply
Relationship between Input and Power Supply
Circuits (except for H3CR-A8E)
The H3CR-A (except for H3CR-A8E) uses transformerless power
supply. When connecting a relay or transistor as an external signal
input device, pay attention to the following points to prevent short-
circuiting due to a sneak current to the transformerless power sup-
ply. If a relay or transistor is connected to two or more Timers, the
input terminals of those Timers must be wired properly so that they
will not differ in phase, otherwise the terminals will be short-circuited
to one another.
It is impossible to provide two independent power switches as
shown below regardless of whether or not the Timers are different in
phase.
Incorrect
Correct
Input/Output
Contact or transistor for
external input signal
Input
terminal
Input
terminal
Input
terminal
Input
terminal
Input
terminal
Input
terminal
H3CR-A
Short-circuit current
Power supply
Power supply
Power supply
H3CR
51