E-122-8-E
6. BLOCK DIAGRAM
(1) Model EL0122
(2) Model EL0123
In the Model EL0122 overall block diagram above, the following circuits are eliminated:
①
Regulated voltage supply (transformer) circuit and power circuit to the pulse generator because it
operates on the battery.
②
Isolation circuit and F/I board (option).
Pulse in
Pulse out
1
2
3
4
5
6
7
8
POWER
GND
Power to
generator
J5
J1
1
J2
2
3
12V
12V
BATT
Stabilized
voltag
supply
(trans.)
1A
Voltage
detect
RESET MODE
BATT LCD COUNTER
CPU
LCD board
F/l board (option)
E
2
PROM
1/2
1/5
1/10
SW3-4
1/1
SW3-5
1/2
SW3-6
1/10
SW3-7
1/100
SW3-8
Factored (std.)
SW3-10
Unfactored
Power board
250
Ω
Analog
output
Alarm
output
Alarm 1
Alarm 2
① +
4
〜
20mA
1
〜
5V
② −
③ +
④ −
④
⑤
⑥
⑦
Battery (option) for EL0122 serves to light the LCD when power is off.
Fig.6.1
