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IM 1E7B0-02E
4-16
4. INSTALLATION
Waterproof gland
Optional specification code : /ECG
Waterproof gland with union joint
Optional specification code : /ECU
Gasket
Gasket
Tightening gland
Tightening gland
G 1/2
G 1/2
Washer
Figure 4.4.2
Waterproof Gland
(2)Conduit Wiring
In case of conduit wiring, please use the waterproof
gland to prevent water flowing through the conduit
pipe into the wiring connection.
Please slope the conduit pipe down, and install a drain
valve at the low end of the vertical pipe.
Please open the drain valve regularly.
Figure 4.4.3
Conduit Wiring
4.4.6
Connecting to External instru-
ments
CAUTION
All the devices to be connected to current output
and pulse output must be conformed to
CSA1010, CSA950, or IEC950.
(1)Analog Signal Output(4 to 20mADC)
ADMAG AE
I+
I–
Load resistance 750
Ω
max
Receiving instrument
Figure 4.4.4 Connection for Analog Signal Output
(2)Pulse Output
IMPORTANT
Please give attention to voltage and polarity in
wiring, because it is transister contact(insulation
type.
• In case of the filtering constant of Electric
Counter is more than the pulse width, it makes
signal decreases and can not be calculated
correctly.
• In case of input impedance of electric counter
is large inductive noise from power supply bring
bad influence to measurement. To calculate
correctly, it is recommended to use shield cable
or to make input impedance small enough
within the limits of pulse output of flowmeter.
ADMAG AE
P+
P–
Protective diode
ADMAG AE
Universal counter or
Electronic counter
Load
PULSE OUT
PULSE OUT
30 V DC, 0.2A. max
Mechanical counter
P+
P–
Figure 4.4.5
Pulse Output Connection
(3)Alarm Output
IMPORTANT
This is a transistor contact(insulated type) so
attention must be paid to volttage and polarity
when making connections.
This output can not switch an AC load. To do
this, another relay (see the figure below) is
required.
* The alarm output works from "close"(Normal) to
"open"(Alarm).
ADMAG AE
P+
P–
Protective diode
ADMAG AE
Magnetic
Valve
Load
30 V DC, 0.2A. max
P+
P–
External
Power supply
AC power supply
This connection can not be made.
Figure 4.4.6
Alarm Output Connection