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H8CA-S
Operations
Power Failure Detection
I
The H8CA-S is capable of detecting and indicating a power failure
on the display. Before power application or when a power failure
occurs, the "
PW OFF
" display flickers indicating that the control
power supply is off.
Relation Among t
, t
, and Supply Voltage
1
2
When a power failure occurs, there is a period during which the
counter does not respond to the input signal, as shown below,
because of the lag in the rise in the internal circuit voltage.
Mounting
There is no limitation in mounting direction. However, avoid
mounting the unit at an angle.
Surface Mounting
I
Using P2CF-11 Front Connecting Socket
When a number of the H8CA-S are mounted in a vertical line or
when an H8CA-S is mounted close to an obstacle such as a wir-
ing duct, be sure to provide a separation of approximately 20 mm
(0.79 in) between adjacent units or between the unit and the
obstacle to allow room for engagement and disengagement of
hooks as shown below.
Wiring duct, etc.
Hook
20
Panel
H8CA-S
105.7
P2CF-11
Likewise, on power application, there is a period during which the
counter does not respond to the input signal, as show below,
because of a lag in the rise in the internal circuit voltage.
Operation and Display
I
"
OUT
" is displayed when counting or timing is complete.
When "
MODE
" lights on display, terminals 1 and 3 ae connected.
In this case, it is not possible to preset values. Be sure to discon-
nect the terminals.
The H8CA-S uses "regular read format," so the preset values can
be changed whether power is ON or OFF.
When changing the preset value during timer or counter opera-
tion, a signal will be output when the new value is the same as the
displayed value.
The front panel keys operate at a touch. Do not press the keys
with excessive force or tools, such as a screwdriver. Press only
with fingers.
After presetting values, part of the display might be blinking. The
H8CA-S will operate normally in this condition, but press the
key so that characters do not blink.
Panel Mounting
I
Using Y92F-30 Adapter for Flush Mounting
Insert the H8CA-S into a square-cut hole from the front of the
mounting panel; insert the adapter from the rear of the H8CA-S
until the clearance between the panel surface and the adaptor is
minimized. Then secure the H8CA-S with two screws onto the
panel.
Y92F-30
P3GA-11
H8CA-S
+
Adapter
8
91.9
14
H8CA-S
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