EJ1
7
Ratings
Characteristics
Communications Characteristics
* For the number of Units that can be connected, refer to “Connection Precautions” on page 11.
HFU Unit/EJ1N-HFUB-DRT
Power supply voltage
DeviceNet power supply 24 VDC (for internal circuits)
EDU power supply 24 VDC (for RS-485 communications circuits and Temperature Controllers)
Operating voltage
range
DeviceNet power supply 11 to 25 VDC
EDU power supply 20.4 to 26.4 VDC
Power consumption (at maximum load) 1 W max. (at maximum load)
Main functions
Remote I/O communications, explicit message communications, CompoWay/F command feed-through
function, parameter backup function, and configuration registration
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 MΩ min. (at 500 VDC)
Dielectric strength 600 VAC, 50/60 Hz for 1 min
Vibration resistance 10 to 55 Hz, 10 m/s
2
for 2 hours each in X, Y, and Z directions
Shock resistance 150m/s
2
max. 3 times each in 3 axes, 6 directions
Weight 70 g max.
Degree of protection IP20
Memory protection EEPROM, 100,000 write operations (backup data)
Standards
Approved standards UL61010-1, CSA C22.2 No.1010-1
Conformed standards EN61010-1 (IEC61010-1): Pollution level 2, overvoltage category II
EMC Directive Refer to page 3.
Communications protocol Conforms to DeviceNet.
Communications
functions
Remote I/O
communications
Master-slave connections (polling, COS, or cyclic)
Conforms to DeviceNet specifications.
I/O allocation
Input and output data can be allocated freely by user with the Configurator.
Allocations can be made to DeviceNet parameters or Temperature Controller parameters.
Two blocks for IN Area, up to 100 words
One block for OUT Area, up to 100 words (The first word is always allocated to the OUT Enable Bit.)
Message communications
Explicit message communications
CompoWay/F communications commands can be sent (commands are sent in explicit message format).
Connection format Combination of multidrop and T-branch connections (for trunk and drop lines)
Baud rate DeviceNet: 500, 250, or 125 kbps, or automatic detection of master baud rate
Communications media Special 5-wire cable (2 signal lines, 2 power lines, and 1 shield line)
Communications distance
The values in parentheses apply when Thin Cables are used.
Communications power supply 11 to 25 VDC
Maximum number of nodes that can be connected 64 (includes Configurator when used.)
Maximum number of slaves that can be connected 63
Error control CRC error detection
DeviceNet power supply Power supplied from DeviceNet communications connector
Applicable Temperature Controllers
EJ1 Series (excluding the EJ1G)
TC4: EJ1N-TC4A-QQ and EJ1N-TC4B-QQ
TC2: EJ1N-TC2A-QNHB, EJ1N-TC2B-QNHB, EJ1N-TC2A-CNB, and EJ1N-TC2B-CNB
Maximum number of Temperature Controllers that
can be connected
*
16 Units (model numbers with TC4: 64 channels max., model numbers with TC2: 32 channels max.)
Baud rate Network length Drop line length Total drop line length
500 kbps 100 m max. (100 m max.) 6 m max. 39 m max.
250 kbps 250 m max. (100 m max.) 6 m max. 78 m max.
125 kbps 500 m max. (100 m max.) 6 m max. 156 m max.
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