Yokogawa ADMAG CA - Manual (Page 28)

4.INSTALLATION
IM 1E8B0-01E
4-19
4.4.6 Connecting to External Instruments
All the devices to be connected to current output and pulse output must be
conformed to CSA1010, CSA950, IEC1010 or IEC950.
(1) Analog Signal Output (4 to 20mA DC signal is output)
ADMAG CA Receiving instrument
Load resistance max 750
Ω
(max 600
Ω
for BRAIN
Communication)
Figure 4.4.4 Connection for Analog Signal Output
(2) Pulse Output
This is a transistor contact (insulated type) so attention must be paid to
voltage and polarity when making connections.
• In case of the constant of inputfilter of Electric Counter is more than the
pulse width, it makes signal decreases and can't calculate correctly.
• In case of input impedance of Electric Counter is large, inductive noise
from power supply bring bad influence to it. To calculate correctly, it is
recommended to use sealed cable or to make input impedance small
enough within the limits of pulse output of Magnetic Flowmeter.
ADMAG CA
PULSE OUT
P+
P–
Protective diode
Mechanical counter
ADMAG CA
PULSE OUT
P+
P–
Universal counter or Electronic counter Load
30 V DC, 0.2A max.
Figure 4.4.5 Pulse Output Connection
CAUTION
IMPORTANT