Omron EJ1N-TC4, EJ1N-TC2 Operation Manual

Modular Temperature Controller EJ1 1

Modular Temperature Controller

EJ1

In-panel Temperature Controller with
Flexible Modular Design for Greater
Integration with Host Devices

• The compact modular structure enables construction of
temperature systems optimally suited to the application.

• Connection can be made to a Programmable Controller without
any programming required, reducing the number of steps
required in ladder programming design.

• One fully multi-input Unit includes a thermocouple, platinum­resistance thermometer, and analog input for easy selection
and reduced inventory requirements.

• Connect directly to the G3ZA Multi-channel Power Controller
using optimum cycle control for high-accuracy regulation with
minimal noise.

• Improved functionality to enable connecting more devices with
programless communications.
Connect multiple Controllers to one PLC.

Refer to the Safety Precautions on page 21.

Models with current outputs added.

Functionality improved for Basic Units and HFU

Ordering Information

■ Temperature Controller

Standard Control Models

Note: 1. An End Unit is always required for connection to a Basic Unit or an HFU. An HFU cannot operate without a Basic Unit. External communications cannot be performed when using a

Basic Unit only.

2. For heating/cooling control applications, control outputs 3 and 4 on the 2-point models are used for the cooling or heating control outputs.
On the 4-point models, heating/cooling control is performed for the two input points.

3. When using the heater burnout alarm, purchase a Current Transformer (E54-CT1 or E54-CT3) separately.

4. There are three operation instructions that can be sent to Basic Units connected to an HFU.

Functional Upgrades

Refer to page 17 for details.
Upgrade functions are marked with “V1.1”.

Name Power

supply

voltage

No. of

control

points

Control
outputs
1 and 2

Control
outputs
3 and 4

Auxiliary

output

Functions Communications

functions

Input type Terminal Model

Heater

burnout

alarm

Event

inputs

Basic Unit
(temperatu re
control)
(See note 1.)

24 VDC
supplied
from the
End Unit

2Voltage

output:
2 points (for
SSR drive)
(See note 2.)

Transistor out­put: 2 points
(sinking)

None 2

(See note

3.)

2 G3ZA connection

port: RS-485
From End Unit:
Port A or port B:
RS-485

Thermo couple,
platinum resis­tance thermome­ter, analog
voltage, and ana­log current se­lectable for each
channel.

M3 terminal EJ1N-TC2A-QNHB

Screw-less
clamp

EJ1N-TC2B-QNHB

4 Voltage output:

2 points (for
SSR drive)
(See note 2.)

None None M3 terminal EJ1N-TC4A-QQ

Screw-less
clamp

EJ1N-TC4B-QQ

2

Current
output:
2 points

Transistor out­put: 2 points
(sinking)

2 M3 terminal EJ1N-TC2A-CNB

Screw-less
clamp

EJ1N-TC2B-CNB

HFU
(See note 1.)

None None None Transistor

output:
4 points (sink­ing)

4
(See note

4.)

From End Unit:
Por t A : R S-4 85
Port C: RS-485 or
RS-232C
selectable.

No input M3 terminal EJ1N-HFUA-NFLK

Screw-less
clamp

EJ1N-HFUB-NFLK

From End Unit:
Por t A : R S-4 85
Port C: RS-422

M3 terminal EJ1N-HFUA-NFL2

Screw-less
clamp

EJ1N-HFUB-NFL2

End Unit
(See note 1.)

24 VDC Transistor

output:
2 points (sink­ing)

None Port A or B: RS-485

Connector: Port A

M3 terminal EJ1C-EDUA-NFLK

Refer to the following manual for precautionary information and other information necessary to use the EJ1:
EJ1 Modular Temperature Controller Operation Manual (Cat. No. H142)

2 Modular Temperature Controller EJ1

■ Accessories (Order Separately)

Current Transformer (CT)

G3ZA Connecting Cable

Rail Mounting Equipment

CX-Thermo Support Software Ver. 3.2

USB-Serial Conversion Cable

Specifications

■ Ratings

Note: Inputs are fully multi-input. Therefore, platinum resistance thermometer, thermocouple, infrared thermosensor, and analog input can be

selected.

Diameter Model

5.8 dia. E54-CT1

12.0 dia. E54-CT3

Cable length Model

5 m EJ1C-CBLA050

Name Model

Mounting Rail PFP-100N

PFP-50N

Model

EST2-2C-MV3

Model

E58-CIFQ1

Basic Unit/EJ1N-TC

Item Type EJ1N-TC4 EJ1N-TC2

Power supply voltage 24 VDC

Operating voltage range 85% to 110% of rated voltage

Power consumption 5 W max. (at maximum load) 4 W max. (at maximum load)

Input (See note.) Thermocouple: K, J, T, E, L, U, N, R, S, B, W, PLII

ES1B Infrared Thermosensor: 10 to 70°C, 60 to 120°C, 115 to 165°C, 140 to 260°C
Analog input: 4 to 20 mA, 0 to 20 mA, 1 to 5 V, 0 to 5 V, 0 to 10 V
Platinum resistance thermometer: Pt100, JPt100

Input impedance Current input: 150

Ω max., voltage input: 1 MΩ min.

Control
outputs

Vol t ag e output Output voltage: 12 VDC ±15%, max. load current: 21 mA (PNP models with short-circuit protection circuit)

Transistor output --- Max. operating voltage: 30 V, max. load current: 100 mA

Current output ---

Current output range: 4 to 20 mA or 0 to 20 mA DC
Load: 500

Ω max. (including transfer output)

(Resolution: Approx. 2,800 for 4 to 20 mA DC, approx.
3,500 for 0 to 20 mA DC)

Event
inputs

Input points --- 2

Contact input --- ON: 1 k

Ω max., OFF: 100 kΩ min.

Non-contact
input

--- ON: Residual voltage: 1.5 V max.,
OFF: Leakage current: 0.1 mA max.

--- Outflow current: Approx. 4 mA per point

Number of input and control
points

Input points: 4, Control points: 4 Input points: 2, Control points: 2

Setting method Via communications

Control method ON/OFF control or 2-PID (with autotuning)

Other functions Two-point input shift, digital input filter, remote SP, SP ramp, manual manipulated variable, manipulated variable

limiter, interference overshoot adjustment, loop burnout alarm, RUN/STOP, banks, I/O allocations, etc.

Ambient temperature range Operating:

−10°C to 55°C, Storage: −25°C to 65°C (with no icing or condensation)

Ambient humidity range Operating: 25% to 85% (with no condensation)

Modular Temperature Controller EJ1 3

■ Characteristics

Note: 1. The indication of K thermocouples in the −200 to 1,300°C range, T and N thermocouples at a temperature of −100°C or less, and U and

L thermocouples at any temperature is ±2°C ±1 digit maximum. The indication of B thermocouples at a temperature of 400°C or less is
unrestricted. The indication of R and S thermocouples at a temperature of 200°C or less is ±3°C ±1 digit max.
W = (±0.5% of indication value (PV) or ±3°C, whichever is greater) ±1 digit max. PLII = (±0.5% of indication value (PV) or ±2°C, whichever
is greater) ±1 digit max.

2. “EU” stands for Engineering Unit. The location of the decimal point depends on the type of sensor that is selected.
If the decimal point locations is set to 0 (****), however, it will be treated as if it were set to 1 (***.*).

3. B, R, S, and W sensors: 0.2°C/

Ω max. (100 Ω max.)

Indication accuracy Thermocouple input/platinum resistance thermometer input:

(±0.5% of indication value (PV) or ±1°C, whichever is greater) ±1 digit max. (See note 1.)
Analog input: ±0.5% FS ±1 digit max.
CT input: ±5% FS ±1 digit max.

Hysteresis 0.1 to 999.9 EU (in units of 0.1 EU) (See note 2.)

Proportional band (P) 0.1 to 999.9 EU (in units of 0.1 EU) (See note 2.)

Integral time (I) 0 to 3,999 s (in units of 1 s)

Derivative time (D) 0.0 to 999.9 s (in units of 0.1 s)

Control period 0.5 s, 1 to 99 s (in units of 1 s)

Manual reset value 0.0% to 100.0% (in units of 0.1%)

Alarm output setting range

−1,999 to 9,999 (decimal point position depends on input type)

Sampling period 250 ms

Influence of signal source
resistance

Thermocouple: 0.1°C (0.2°F)/

Ω max. (100 Ω max per line) (See note 3.)

Platinum resistance thermometer: 0.4°C (0.8°F)/

Ω max. (10 Ω max per line)

Insulation resistance 20 M

Ω min. (at 500 VDC)

Dielectric strength 600 VAC, 50/60 Hz for 1 min between current-carrying terminals of different polarity

Vibration resistance

10 to 55 Hz, 20 m/s

2

for 2 hours each in X, Y, and Z directions

Shock resistance

150 m/s

2

max., 3 times each in 6 directions

Weight 180 g

Degree of protection Rear case: IP20, Terminal section: IP00

Memory protection EEPROM (non-volatile memory) (number of writes: 100,000)

Standards Approved standards UL61010C-1, CSA C22.2 No.1010-1

Conformed standards EN61010-1 (IEC61010-1): Pollution level 2, overvoltage category II

EMC Directive EMI: EN61326

EMI Radiated: EN55011 Group1 class A
EMI Conducted: EN55011 Group1 class A
EMS: EN61326
ESD Immunity: EN61000-4-2
Radiated Electromagnetic Field Immunity: EN61000-4-3
Burst immunity/Noise Immunity: EN61000-4-4
Conducted Disturbance Immunity: EN61000-4-6
Surge Immunity: EN61000-4-5
Commercial Frequency Immunity: EN61000-4-8
Voltage Dip/Interrupting Immunity: EN61000-4-11

4 Modular Temperature Controller EJ1

■ Communications Specifications

Note: 1. Connection from the EJ1C-EDU

2. A special cable (EJ1C-CBLA050) must be purchased separately for the G3ZA connection.

3. For the number of Units that can be connected, refer to Connection Precautions on page 11.

4. The Modbus protocol can be used with Basic Unit with version 1.1 or higher.

■ Current Transformer (CT)
Rating

■ Characteristics of the Heater
Burnout Alarm, SSR Failure
Alarm, and Heater Overcurrent
Alarm

(TC2@-QNHB Model Only)

Note: 1. When the control output ON time is less than 100 ms, heater

burnout detection and heater current measurement are not
performed.

2. When the control output OFF time is less than 100 ms, SSR
failure alarm and leakage current measurement are not
performed.

Item Port B

(See note 1.)

Port A Terminal/ Port A Connector

(See note 1.)

G3ZA Connection Port

(See note 2.)

Transmission path
connection

RS-485 (multipoint)

Communications
method

RS-485 (two-wire, half duplex)

Synchronization
method

Start-stop synchronization

Communications
protocol

CompoWay/F, Modbus (See note 4.) CompoWay/F

Baud rate 9.6, 19.2, 38.4, 57.6, or 115.2 kbps 38.4 kbps fixed 57.6 kbps fixed

Transmission code CompoWay/F: ASCII, Modbus: RTU

Data bit length 7 or 8 bits 7 bits

Stop bit length 1 or 2 bits 2 bits

Error detection Vertical parity (none, even, or odd) Vertical parity (even)

Block check character (BCC): with CompoWay/F, CRC-16: (with Modbus)

Flow control None

Interface RS-485

Retry function None

Communications
response wait time

0 to 99 ms (default: 5 ms)
1 to 99 ms (default: 5 ms) (Ver. 1.0)

1 to 99 ms (default: 1 ms) ---

Number of Units
that can be
connected in
parallel
(See note 3.)

64 Units (model numbers with TC4: 256
channels, model numbers with TC2: 128
channels)
Communications connection via port B
on the End Unit

64 Units (model numbers with TC4: 256
channels, model numbers with TC2: 128
channels)
Communications connection via port A
on the End Unit

8 Units (Communications connection
via G3ZA port on the Basic Unit)

V1.1

V1.1

Dielectric
strength

1,000 VAC for 1 min

Vibration
resistance

50 Hz, 98 m/s

2

Weight E54-CT1: Approx. 11.5 g, E54-CT3: Approx. 50 g

Accessories
(E54-CT3 only)

Armatures (2), plugs (2)

Maximum
heater current

100 VAC

Input current
indication
accuracy

±5%FS ±1 digit max.

Heater
burnout alar m
setting range

0.1 to 99.9 A (in units of 0.1 A)

0.0 A: Heater burnout alarm output turns OFF.

100.0 A: Heater burnout alarm output turns ON.
Min. detection ON time: 100 ms (See note 1.)

SSR failure
alarm setting
range

0.1 to 99.9 A (in units of 0.1 A)

0.0 A: SSR failure alarm output turns ON.

100.0 A: SSR alarm output turns OFF.
Min. detection OFF time: 100 ms (See note 2.)

Heater
overcurrent
alarm setting
range

0.1 to 99.9 A (in units of 0.1 A)

0.0 A: Heater overcurrent alarm output turns ON.

100.0 A: Heater overcurrent alarm output turns OFF.
Min. detection ON time: 100 ms (See note 1.)

Modular Temperature Controller EJ1 5

■ Input Ranges

Sensor inputs are fully multi-input. Therefore, platinum resistance thermometer, thermocouple, infrared thermosensor, and analog input can be
selected.
Inputs can be set for each channel using multi-inputs.

Input type Platinum resistance

thermometer

Name Pt100 JPt100

Tem ­pera­ture
range
(°C)

2300

1800

1700

1600

1500

1400

1300

1200

1100

1000

900

800

700

600

500

400

300

200

100

0

−100.0

−200.0

850

500.0 500.0

100.0 1 00.0

0.0 0.0

−200 −199.9 −199.9

Setting number

01234

Input type Thermocouple ES1B Infrared

Thermosensor

Analog input

Name K J T E L U N R S B W PL

II

10
to
70
°C

60
to

120

°C

115

to

165

°C

140

to

260

°C

4 to

20

mA

0 to

20

mA

1 to

5 V

0 to

5 V

0 to

10 V

Tem ­pera­ture
range
(°C)

2300

1800

1700

1600

1500

1400

1300

1200

1100

1000

900

800

700

600

500

400

300

200

100

0

−100.0

−200.0

2300

Any of the following ranges,
by scaling:

−1999 to 9999

−199.9 to 999.9

−19.99 to 99.99

−1.999 to 9.999

1800

1700 1700

1300 1300 1300

850 850

600

500.0

400.0 400 400.0 400 400.0

260

120 165

90

100

0 00 000000

−20.0 −100 −20.0 −100

−200 −200 −199.9 −200 −199.9 −200

Setting number

5 6 7 8 9 1011121314151617181920212223242526272829

Applicable standards by input type are as follows:
K, J, T, E, N, R, S, B: JIS C1602-1995, IEC584-1
L: Fe-CuNi, DIN 43710-1985
U: Cu-CuNi, DIN 43710-1985

W: W5Re/W26Re, ASTM E988-1990
PL II: According to Platinel II Electromotive Force

Table by Engelhard Cor p.
JPt100: JIS C 1604-1989, JIS C 1606-1989
Pt100: JIS C 1604-1997 IEC 751

Shaded ranges indicate default settings.

6 Modular Temperature Controller EJ1

■ Ratings

Note: 1. Auxiliary outputs can be allocated using digital output allocations.

2. Event inputs can be allocated using digital output allocations.

■ Characteristics

■ Communications Characteristics: Port C

When using an HFU, port B on the End Plate can be used for distributed placement only.

Note: 1. The communications method can be switched between RS-485 and RS-232C. A separate model must be used for RS-422 communications.

2. For the number of Units that can be connected, refer to Connection Precautions on page 11.

HFU Unit/EJ1N-HFU

Power supply voltage 24 VDC

Operating voltage range 85% to 110% of rated voltage

Power consumption 2 W max. (at maximum load)

Auxiliary outputs
(See note 1.)

Outputs 4

Transistor outputs Max. operating voltage: 30 VDC, Max. load current: 50 mA

Event inputs (See
note 2.)

Inputs 4

Contact inputs ON: 1 k

Ω max., OFF: 100 kΩ min.

Transistor inputs ON: residual voltage of 1.5 max., OFF: leakage current of 0.1 mA max.

Short-circuit current: Approx. 4 mA (per contact)

Programless
connection

Programless downloading
(EJ1 reads data from a PLC)

Number of parameters that can be set: 600

300 (Ver. 1.0)

Programless uploading
(EJ1 writes data to a PLC)

Number of parameters that can be set: 600

300 (Ver. 1.0)

Applicable PLCs OMRON: SYSMAC CS/CJ/CP1H Series

Mitsubishi Electric: MELSEC-An/AnS/FX

3UC

Series

Mitsubishi Electric: MELSEC-Q/QnA/QnAS Series (Ver. 1.0)

Ambient temperature range Operating:

−10°C to 55°C

Storage:

−25°C to 65°C (with no icing or condensation)

Ambient humidity range Operating: 25% to 85% (with no condensation)

Insulation resistance 20 M

Ω min. (at 500 VDC)

Dielectric strength 600 VAC, 50/60 Hz for 1 min between current-carrying terminals of different polarity

Vibration resistance

10 to 55 Hz, 20 m/s

2

for 2 hours each in X, Y, and Z directions

Shock resistance

150 m/s

2

max., 3 times each in 6 directions

Weight 160 g

Degree of protection Rear case: IP20, Terminal section: IP00

Memory protection EEPROM (non-volatile memory) (number of writes: 100,000)

Standards Approved standards UL61010C-1, CSA C22.2 No.1010-1

Conformed standards EN61010-1 (IEC61010-1): Pollution level 2, overvoltage category II

EMC Directive Refer to page 3.

Transmission path connection RS-485/RS-422: Multi-point, RS-232C: Point-to-point (See note 1.)

Communications method RS-485/RS-422 (two-wire, half duplex), RS-232C

Synchronization method Star t-stop synchronization

Communications protocol • OMRON PLC protocol (Connectable PLCs: SYSMAC CS/CJ/CP1H Series)

• AnA/AnU CPU common commands (Connectable PLCs: MELSEC-An/AnS/FX

3UC

Series)

• MC protocol (form 5) (Connectable PLCs: MELSEC-Q/QnA/QnAS Series)

Baud rate 9.6, 19.2, 38.4, 57.6, or 115.2 kbps

Transmission code Binary

Data bit length 8 bits

Stop bit length 1 bit

Error detection Depends on protocol selected for the programless communications protocol.

Flow control None

Interface RS-485, RS-422, RS-232C (See note 1.)

Retry function Available

Communications response wait time 0 to 99 ms (default: 5 ms)

1 to 99 ms (default: 5 ms) (Ver. 1.0)

Number of Basic Units that can be connected in
parallel (See note 2.)

16 Units (model numbers with TC4: 64 channels, model numbers with TC2: 32 channels)

Number of HFUs that can be connected • SYSMAC CS/CJ-series PLCs: 8 (EJ1-HFU@-NFLK)

• MELEC Q/QnA/QnAS-series PLCs: 8 (EJ1-HFU@-NFL2 )

V1.1

V1.1

V1.1

V1.1

V1.1

V1.1

Modular Temperature Controller EJ1 7

■ Ratings

Note: Auxiliary output can be allocated using the bus output allocation for each Basic Unit.

■ Characteristics

■ Communications

Note: 1. Port B communications for the End Unit cannot be used when port C communications for the HFU is used.

2. Port A connector communications and port A terminal communications cannot be used at the same time.

End Unit/EJ1C-EDU

Power supply voltage 24 VDC

Operating voltage range 85% to 110% of rated voltage

Auxiliary output
(See note.)

Outputs 2

Transistor outputs Max. operating voltage: 30 VDC, Max. load current: 50 mA

Ambient temperature range Operating:

−10°C to 55°C

Storage:

−25°C to 65°C (with no icing or condensation)

Ambient humidity range Operating: 25% to 85% (with no condensation)

Insulation resistance 20 M

Ω min. (at 500 VDC)

Dielectric strength 600 VAC, 50/60 Hz for 1 min between current-carrying terminals of different polarity

Vibration resistance

10 to 55 Hz, 20 m/s

2

for 2 hours each in X, Y, and Z directions

Shock resistance

150 m/s

2

max., 3 times each in 6 directions

Weight 70 g

Degree of protection End Unit case: IP20, Terminal section: IP00

Standards Approved standards UL61010C-1, CSA C22.2 No.1010-1

Conformed standards EN61010-1 (IEC61010-1): Pollution level 2, overvoltage category II

EMC Directive Same as for the Basic Unit. Refer to page 3.

Port B (See note 1.) Basic Unit Communications (Refer to Communications Specifications on page 4.)

Por t A Basic Unit Communications (Refer to Communications Specifications on page 4.)

Port A connector (See note 2.) E58-CIFQ1

8 Modular Temperature Controller EJ1

Unit Configuration Example

■ Minimal Configuration

Small Systems with 2 Channels or 4 Channels Communicating with the Host
Device via RS-485 (CompoWay/F Protocol)

• Alarms can be allocated to the auxiliary output for the End Unit.

• G3ZA outputs can be used.

■ Multiple Units without an EJ1N-HFU

Building Systems Communicating with the Host Device, such as a PLC, PT, or
Computer, via RS-485 (CompoWay/F Protocol)

• The 2 auxiliary alarm outputs (transistor outputs) provided on the End Unit can be used for integrated alarm systems.

• G3ZA outputs can be used.

• Distributed placement is possible by using multiple EJ1C-EDU End Units.

COM1
COM2
COM3

PWR
RUN
ERR
ALM

SW1

ON

SW2

21345678

EJ1-TC4

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

PC

PLC PT

PC

EJ1N-TC4

or

EJ1N-TC2 EJ1C-EDU

Port A (connector): USB connection can be made with the
E58-CIFQ1 (sold separately).

CX-Thermo for setting

Host devices

Port B: RS-485 (CompoWay/F)

SW2

SW1

ERROR

OCC

SD/RD

READY

G3ZA

PC

PLC PT

PC

EJ1N-TC4
or
EJ1N-TC2

EJ1C-EDU

Port B: RS-485 (CompoWay/F)

COM1
COM2
COM3

PWR
RUN
ERR
ALM

SW1

ON

SW2

21345678

EJ1-TC4

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

COM1
COM2
COM3

PWR
RUN
ERR
ALM

SW1

ON

SW2

21345678

EJ1-TC4

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

COM1
COM2
COM3

PWR
RUN
ERR
ALM

SW1

ON

SW2

21345678

EJ1-TC4

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

SW2

SW1

ERROR

OCC

SD/RD

READY

SW2

SW1

ERROR

OCC

SD/RD

READY

G3ZAG3ZA

Host devices

G3ZA
connection
port

G3ZA
connection
port

G3ZA
connection
port

CX-Thermo for setting

Port A (connector): USB connection can be made with
the E58-CIFQ1 (sold separately).