10
5. Wiring
Warning
Turn the power supply to the instrument off before wiring.
Working on or touching the terminal with the power switched on may result in severe injury
or death due to Electric Shock.
5.1 Terminal arrangement
•
EVT1 : Alarm 1 output
•
EVT2 : Alarm 2 output (option) or
Heater burnout alarm output (option)
(Utilize common output terminals.)
• OUT1 : Control output or Heating output (option)
•
OUT2 : Cooling output (option)
•
TC
: Thermocouple input
•
RTD
: Resistance temperature detector input
•
DC
: DC current, DC voltage input
(For DC voltage input, + side
terminal number differs depending
on the voltage.)
For DC current input, 50
shunt resistor
(AKT4810, sold separately) must be
connected between input terminals.
•
CT1
: Current transformer input 1
(Option: Single phase, 3-phase)
•
CT2
: Current transformer input 2
(Fig. 5.1-1)
(Option: 3-phase)
•
DI
: Contact input (option)
•
RS-485: Serial communication RS-485 (option)
When using a Terminal cover (AKT4H801), refer to Section “3.4 Note when using a Terminal cover (AKT4H801)” on p.8.
5.2 Lead wire solderless terminal
Use a solderless terminal with an insulation sleeve in which an M3 screw fits as shown below.
The torque is approximately 0.63N•m.
Solderless
terminal
Manufacturer
Model
Tightening torque
Nichifu Terminal Industries CO.,LTD.
TMEV1.25Y-3
Y type
Japan Solderless Terminal MFG CO.,LTD.
VD1.25-B3A
Nichifu Terminal Industries CO.,LTD.
TMEV1.25-3
Round type
Japan Solderless Terminal MFG CO.,LTD.
V1.25-3
0.63N•m
(Fig. 5.2-1)
5.3 Wiring of Heater burnout alarm (Option: Single phase, 3-phase)
This alarm is not usable for detecting heater current under phase control.
Use the current transformer (CT) provided, and pass one lead wire of the heater circuit into the hole of
the CT. (Fig. 5.3-1)
When wiring, keep the CT wire away from AC sources or load wires to avoid the external interference.
In the case of 3-phase, pass any 2 lead wires of R, S, T into the CT, and connect them with CT1 (13, 14)
and CT2 terminals (14, 15). (Fig. 5.3-2)
Solder the CT and wires connected to the CT input terminals. (There is no polarity.)
(Fig. 5.3-1)
(Fig. 5.3-2)
(13)
ＣＴ
(14)
R
S
T
Pass any 2 wires of R, S and T
into CT.
CT1 input terminals
Heater
Power
supply
ø
3.2mm
3.2mm
5
.8
m
m
o
r
le
s
s
5
.8
m
m
o
r
le
s
s
Solder the CT and wires connected
to the CT input
terminals. (There
is no polarity.)
