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K7TM

Heater Condition Monitoring Device

K7TM

Predictive maintenance by monitoring heater condition

Item list of K7TM

Software Download

You can download software for the K7TM-A2.

Related Contents

last update: April 1, 2022

Ratings and Specifications

Item Specifications
Operation
power
supply		 Power supply voltage
and frequency		 K7TM-A2MA: 100 to 240 V AC, 50/60 Hz
K7TM-A2MD: 24 V AC, 50/60 Hz, 24 V DC
Operating power
supply voltage range		 85% to 110% of the rated voltage
Operating frequency
range		 45 to 65 Hz
Power consumption K7TM-A2MA: 8.5 VA max. (100 to 240 V AC)
K7TM-A2MD: 5.2 VA max. (24 V AC)/ 2.9 W max. (24 V DC)
Recommend external
fuse		 T2A, time delay, high-breaking capacity
Ambient operating temperature -10 to 55°C
Ambient operating humidity 25% to 85%
Storage temperature -20 to 65°C (with no condensation or icing)
Altitude 2,000 m max.
Insulation resistance 20 mΩ min.
Between all external terminals and case;
Between all power supply terminals and all other terminals;
Between (all voltage input terminals + all CT input terminals) and (all
communications terminals + all transistor terminals);
Between all voltage input terminals and all CT input terminals;
Between the channels of voltage inputs;
Between the channels of CT inputs
Dielectric strength 2,000 V AC for 1 minute
Between all external terminals and case;
Between all power supply terminals and all other terminals;
Between (all voltage input terminals + all CT input terminals) and (all
communications terminals + all transistor terminals);
Between all voltage input terminals and all CT input terminals;
Between the channels of voltage inputs;
Between the channels of CT inputs
Vibration resistance Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s²,
10 sweeps of 5 min each in X, Y, and Z directions
Shock resistance 100 m/s2, 3 times each in X, Y, and Z axes, 6 directions
Degree of protection IP20
Terminal block type Push-In Plus
Exterior color Black (Munsell N 1.5)
Mounting DIN Track
Weight Approx. 200 g
Wiring
material		 Wire type Solid or Stranded wire
Wiring material Copper
Recommended wires 0.25 to 1.5 mm2
AWG 24 to AWG 16
Stripping length
(without ferrules)		 8 mm
Installation environment Operation voltage: EN/IEC 61010-1 Pollution Degree 2, Overvoltage category II
Measurement circuit: EN/IEC 61010-2-030 Pollution Degree 2, CAT II 600 V or
CAT III 300 V
Industrial electromagnetic
environment		 EN/IEC 61326-1 Industrial electromagnetic environment

Measurement Specifications

Item Specifications
Input range Current
Rated 5 A AC: 0.00 to 5.00 A AC
Rated 25 A AC: 0.0 to 25.0 A AC
Rated 100 A AC: 0.0 to 100.0 A AC
Rated 200 A AC: 0.0 to 200.0 A AC
Rated 400 A AC: 0.0 to 400.0 A AC
Rated 600 A AC: 0.0 to 600.0 A AC
Rated frequency: 50/60 Hz

Voltage
Rated 120 V AC: 0.0 to 120.0 V AC
Rated 240 V AC: 0.0 to 240.0 V AC
Rated 480 V AC: 0.0 to 480.0 V AC
Rated 600 V AC: 0.0 to 600.0 V AC
Rated frequency: 50/60 Hz
Measurable range Current
Rated 5 A AC: 0.00 to 5.50 A AC
Rated 25 A AC: 0.0 to 27.5 A AC
Rated 100 A AC: 0.0 to 110.0 A AC
Rated 200 A AC: 0.0 to 220.0 A AC
Rated 400 A AC: 0.0 to 440.0 A AC
Rated 600 A AC: 0.0 to 650.0 A AC

Voltage
Rated 120 V AC: 0.0 to 132.0 V AC
Rated 240 V AC: 0.0 to 264.0 V AC
Rated 480 V AC: 0.0 to 528.0 V AC
Rated 600 V AC: 0.0 to 660.0 V AC
Measurement accuracy Absolute accuracy of voltage/current: ±0.5% FS ±1 digit to the
input range Conditions:
• When sine waves are input continuously
• Variations in CTs are not included.

Repeat accuracy of resistance value (reference value): ±1% rdg
±1 digit Conditions:
• When sine waves are input continuously
• Variations in CTs are not included.
Measurement target Resistance heating heater
CH1 voltage input
CH2 voltage input		 Measurement accuracy ±0.5% FS ±1 digit
Input range 0 to 600 V AC, 50/60 Hz
Recommend external fuse Class CC, Class J, or Class T with a rated current of 7 A or less
CH1 CT input
CH2 CT input		 Measurement accuracy ±0.5% FS ±1 digit
Input range 0 to 600 A AC, 50/60 Hz

Output Specifications of Transistor Output Terminals

Item Specifications
Transistor output
(Alarm output,
Output at error)		 Contact form NPN open collector (normally close)
Rated voltage 24 V DC (maximum voltage: 26.4 V DC)
Maximum current 50 mA
Leakage current
when power turning OFF		 0.1 mA max.
Residual voltage 1.5 V max.

Communications Specifications

Item Specifications
RS-485
communications 1
RS-485
communications 2		 Transmission path
connection method		 RS-485: Multidrop
Communications method RS-485 (2-wire, half duplex)
Cable length When the baud rate is 115.2 kbps or less, the maximum length is
500 m with a twisted-pair cable.
When the baud rate is 230.4 kbps, the maximum length is 200 m
with a twisted-pair cable.
Protocol Modbus RTU
Baud rate 9.6 kbps/19.2 kbps/38.4 kbps/57.6 kbps/115.2 kbps/230.4 kbps
Data length Always 8 bits
Stop bits Always 1 bit (with parity being even/odd)
Always 2 bits (with parity being none)
Connection configurations 1:1 or 1:N
Maximum number of Units 32 Units (including the host system)
Parity None/Even/Odd
Send wait time 0 to 99 ms

Ratings and Specifications of CT *1

Model K6CM-
CICB005(-C)		 K6CM-
CICB025(-C)		 K6CM-
CICB100(-C)		 K6CM-
CICB200(-C)		 K6CM-
CICB400(-C)		 K6CM-
CICB600
Construction Internal split type
Primary-side rated current 5 A 25 A 100 A 200 A 400 A 600 A
Rated voltage 600 V AC
Secondary winding 3,000 turns 6,000 turns 9,000 turns
Insulation resistance Between output terminal and case: 50 mΩ min
Dielectric strength Between output terminal and case: 2,000 V AC for 1 minute
Protective element 7.5 V clamp element
Allowable number of
attachments and detachments		 100 times
Diameter of wire attachable
*2		 7.9 mm dia.
max.		 9.5 mm dia.
max.		 14.5 mm dia.
max.		 24.0 mm dia.
max.		 35.5 mm dia. max.
Operating temperature and
humidity range		 -20 to 60°C, 25% to 85% (with no condensation or icing)
Storage temperature and
humidity range		 -30 to 65°C, 25% to 85% (with no condensation or icing)
Supplied cable length 2.9 m
Supplied cable terminal K7TM side: Ferrule, CT side: Round crimp terminal
Degree of protection IP20

*1. To comply with UL certification, refer to Conformance to Safety Standards (Data Sheet).
*2. When you use a flat wire, refer to the outline dimensional drawing of the relevant CT and use a CT with a larger
     However, use the CT within the range of its rated current.

last update: April 1, 2022

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