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CN158/CN159
2-7.Terminal arrangement table

3. Instruction for front panel

3-1. Drawing and the name of the parts
This is an example of the front panel of CN154/CN155.
Name of parts
: Measured value
(PV) display
: Set value (SV)
display
: Monitor LED
: Key switches
10 20
23 24 19
18
17
16
15
14
13
12
2221 11
9
8
7
6
5
4
3
2
1
422A 485
RD–
RD+
SD– –
SD+ +
SG SG L
N
COM+
NC
COM
AL/HR
AH
NO –
Power
CONTROL
OUTPUT
ALARM
OUTPUT
CT
SB
IN PUTRTD
TC•mV
V•mA
+A
–B
B
~
Heater break alarm (option) CT input terminal
Name of terminal and description Terminal number
CN150 Series
Power terminal
100-260V AC±10% 50/60Hz 12VA
Protective conductor terminal ( )
Input terminal
R. T. D. A, Thermocouple, Voltage, Current +
R. T. D. B, Thermocouple, Voltage, Current –
R. T. D. B
Output terminal
Contact: COM, SSR Drive voltage, Voltage,
Current +
Contact: NO, SSR Drive voltage, Voltage,
Current –
Contact: NC
Communication terminal
For RS-422A For RS-485
SG SG
SD+ +
SD– –
RD+
RD–
Alarm output (option) terminal
COM Contact rating 240V AC 1.5A
(resistive load)
AH Higher limit alarm
AL/HBLower limit alarm or heater break alarm
Set value bias (option) input terminal
11-12
13
21-22
23-24
7
8
10
18
19
20
1
2
3
4
5
14
15
16
Note: For Thermocouple, Voltage, and Current input,
measurement error results by connection between B and
B terminal.
3-2. Instruction for front panel
:Measured value (PV) display (green)
(1) Displays current measured value on the mode 0 basic
screen.
(2) Displays parameter type on each parameter screen.
:Set value (SV) display (orange)
(1) Displays set value on the mode 0 basic screen.
(2) Displays selected item and set value on each parameter
screen.
:Monitor LED
(1) OUT (output) monitor LED (green)
•For contact or SSR drive voltage output, a light turns
on for output ON and turns off for output OFF.
•For current or voltage output, the light intensity
changes proportionally to the output altitude.
(2) AT (auto tuning) monitor LED (green)
•On selection by , ON turns on AT waiting
( key), flashes on AT execution.
(3) AH alarm output monitor LED (red)
•Turns on for higher limit alarm output ON.
(4) AL/HB alarm output monitor LED (red)
•Turns on for lower alarm output ON or heater break
alarm ON.
(5) MAN (manual control output) monitor LED (green)
•Flashes when control output is in manual operation.
(6) STBY (control output stop) monitor LED (green)
•Turns on when the control output stop mode is
selected.
(7) COM (communication) monitor LED (green)
•Turns on when the remote communication mode is
selected.
: Key switches
(1) (parameter) key
•Press on set screen to move to next set screen.
•Keep pressing three (3) seconds for function of move
key between basic screen of the mode 0 screen group
and direct call screen of mode 1 screen group.
(2) (down) key
•Press on the set screen to flash the point of the least
digit and to reduce data or back increment data.
(3) (up) key
•Press on the set screen to flash the point of the least
digit and to increase data of increment data.
(4) (entry/registration) key
•Press on the set screen of the mode 0 screen group
and mode 1 screen group to fix the data changed by
the , keys and to extinguish flash of the point.
•The function selecting screen, of the mode 2 screen
group, registers data of the point flashing digit and
simultaneously shifts a data changeable digit (the
point flashing digit).
•The input scaling screen, of the mode 2 screen group,
registers data and shifts a parameter capable of being
set (in the row in which the rightmost point is
flashing).
•Press the key for five seconds and it functions to
change the basic screen of the mode 0 screen group to
the function selecting screen of the mode 2 screen
group and vice versa.
(5) (manual) key
•Pressing this key on the control output screen changes
automatic control output to manual control output and
vice versa. During manual control output, the MAN
monitor LED flashes.
•The key does not function in the control output
stop mode.
ENT
MAN
ENT
MAN
PV
SV
OUT AT AH MAN STBY COMAH/HB
ENT
MAN
˚C
4
3
2
1