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EJ1

Modular Temperature Controller

EJ1

Implement a Multi-Point Control System Easily with Space Saving and Wire Saving by Connecting Modules

Item list of EJ1

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last update: June 24, 2024

Basic Unit/EJ1N-TC

Ratings

Type EJ1N-TC4 EJ1N-TC2
Power supply voltage 24 VDC
Operating voltage range 85% to 110% of rated voltage
Power consumption 3 W max. (at maximum load) 2.5 W max. (at maximum load)
Input * Thermocouple: K, J, T, E, L, U, N, R, S, B, C/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		 Voltage output Output voltage: 12 VDC ±15%, max. load current: 21 mA (PNP models with short-circuit protection circuit)
Transistor output --- Max. operating voltage: 30 VDC,
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. 10,000)
Event
inputs		 Input points --- 2
Contact input --- ON: 1 kΩ 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, self-tuning)
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)

* Inputs are fully universal. Therefore, platinum resistance thermometer, thermocouple, infrared thermosensor, and analog
   input can be selected.

Characteristics

Indication accuracy Thermocouple input: (±0.3% of indication value or ±1°C, whichever is greater)
±1 digit max. *1
Platinum resistance thermometer input: (±0.2% of indication value or ±0.8°C,
whichever is greater) ±1 digit max.
Analog input: ±0.2% FS ±1 digit max.
CT input: ±5% FS ±1 digit max.
Hysteresis 0.1 to 999.9 EU (in units of 0.1 EU) *2
Proportional band (P) 0.1 to 999.9 EU (in units of 0.1 EU) *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 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)
Platinum resistance thermometer: 0.1°C (0.2°F)/Ω max. (10 Ω max per line)
Insulation resistance 20 MΩ 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/s2 for 2 hours each in X, Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions
Weight 160 g
Degree of protection Rear case: IP20, Terminal section: IP00
Memory protection Non-volatile memory (number of writes: 100,000)
Standards Approved standards cURus UL61010-1/CSA C22.2 No.61010-1,
Korean wireless regulations (Radio law: KC Mark)
Conformed standards RCM and UKCA
EMC Directive EMI: EN61326
EMI Radiated: EN55011 Group1 class A
EMI Conducted: EN55011 Group1 class A
EMS: EN61326
ESD Immunity: EN61000-4-2
Electromagnetic Field Immunity: EN61000-4-3
Burst immunity/Noise Immunity: EN61000-4-4
Conducted Disturbance Immunity: EN61000-4-6
Surge Immunity: EN61000-4-5

*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.
      C/W = (±0.5% of indication value or ±3°C, whichever is greater) ±1 digit max. PLII = (±0.5% of indication value or
      ±2°C, whichever is greater) ±1 digit max.
      The indication accuracy for K thermocouples in the −199.9 to 999.9°C range is (±0.5% of indication value or ±1°C,
      whichever is greater) ±10 digit maximum. However, at a temperature of -100°C or less, it is ±2°C ±10 digit
      maximum.
*2. 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 (***.*).

Communications Specifications

Item Port B *1 Port A Terminal/
Port A Connector *1		 G3ZA Connection Port *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 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		 CompoWay/F: ASCII
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: 1 ms) ---
Number of Units that
can be connected in
parallel *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)

*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 Data Sheet.

Current Transformer (CT) Rating

Dielectric strength 1,000 VAC for 1 min (E54-CT1, E54-CT3)
1,500 VAC for 1 min (E54-CT1L, E54-CT3L)
Vibration resistance 50 Hz, 98 m/s2
Weight E54-CT1: Approx. 11.5 g, E54-CT3: Approx. 50 g
E54-CT1L: Approx. 14 g, E54-CT3L: Approx. 57 g
Accessories (E54-CT3 only) Armatures (2), plugs (2)

Characteristics of the Heater Burnout Alarm, SSR Failure Alarm, and Heater Overcurrent Alarm (TC2[]-QNHB Model Only)

Maximum heater current 100 VAC
Input current indication accuracy (±5.0A) ±1 digit max.
Heater burnout alarm 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 *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 *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 *1

*1. When the control output ON time is less than 100 ms, heater burnout detection, heater overcurrent 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.

Input Ranges

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

EJ1 Specifications 11

End Unit/EJ1C-EDU

Ratings

Power supply voltage 24 VDC
Operating voltage range 85% to 110% of rated voltage
Auxiliary output
*		 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)

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

Characteristics

Insulation resistance 20 MΩ 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/s2 for 2 hours each in X, Y, and Z directions
Shock resistance 150 m/s2, 3 times each in 6 directions
Weight 70 g
Degree of protection End Unit case: IP20
Standards Approved standards cURus UL61010-1/CSA C22.2 No.61010-1,
Korean wireless regulations (Radio law: KC Mark)
Conformed standards RCM and UKCA
EMC Directive Same as for the Basic Unit. Refer to Characteristics.

Communications

Port B Basic Unit Communications (Refer to Communications Specifications.)
Port A Basic Unit Communications (Refer to Communications Specifications.)
Port A connector * E58-CIFQ1

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

last update: June 24, 2024

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