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4.3.3 Allocation of the terminal block
O
sensor
O
2
2
input
thermocouple input
Exclusive
cable
1
2
O
2
TC2
15
Thermocouple
M4 screw
input
(combustion control)
(Note 5)
1
(Note 1)
23
(Note 2)
9
(Note 3)
25
25
Contact capacity: 250V 3A (resistance load)
(Note 4) 17
18
19
20
(Note 5)
15
16
When combustion efficiency display (option) is selected.
(Note 6)
7
(Note 7)
21
External terminal (TM1) / M3 screw
sensor
Analog output
4-20mA DC
or 0-1V DC
3
4
5
6
AO
TC1
or
DI1
DI3 DICOM
DI2
16
17
18
19
(Note 2)
Contact input
Shorten: ON (Current 5mA DC)
Open: OFF (Open Voltge 5V DC)
(Note 4)
Communication terminal (TM2)
2
3
Closed during calibration, blow down, sensor diagnosis, PID auto tuning
24
• • • •
or sensor recovery of detector.
10
• • • • Closed during blowdown of detector. (option)
11
• • • • Closed during zero calibration.
26
• • • • Closed during span calibration.
• • • • For various contact input (No-voltage contact)
• • • • R-type thermocouple input
Closed while disconnection of O
8
• • • •
heater control temperature error is detected.
22
• • • • Closed while an oxygen concentration alarm is issued.
(Note 6)
(Note 2)
Full contact
Blow contact
output contact
output
capacity
250V AC / 3A
30V DC / 3A
250V AC / 3A
30V DC / 3A
7
8
9
FAULT
BLOW
ALARM
MAINTE
20
21
22
Alarm contact
Maintenance
output
contact output
250V AC / 3A
250V AC / 3A
30V DC / 3A
30V DC / 3A
(Note 7)
(Note 1)
Terminal number
1
2
RS232C
TXD
RXD
RS485
TRX+
TRX-
sensor input or thermocouple input, or
2
- 12 -
O
sensor
2
heater power
output
10
11
12
13
ZV
ZERO
GAS
HEATER
SPAN
GAS
COM
SV
23
24
25
26
Calibrating gas
contact output
250V AC / 3A
30V DC / 3A
(Note 3)
Remark
3
GND
Standard
GND
Option
14
AC
N
L
27
28
AC
Power supply
input
100V to 120V AC
or 200V to 240V AC
INZ-TN1ZKME-E
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