Specifications; Application; J.net Module Specifications; Communication Specifications - Hitachi J.NET User Manual

1. Specifications

1.1 Application

By connecting the J.NET module (model: LQE540-E) to a network compliant with the JEMA Level 1
Specifications for Programmable Controller Field Networks, data communication between various station
devices can be performed. (Message read/write services are not supported.)
JEMA: The Japan Electrical Manufacturers Association
1.2 Specifications

1.2.1 J.NET module specifications

Model
Number of networks
Maximum mountable number of modules
Weight
Current consumption
Hot swapping

1.2.2 Communication specifications

Transmission method
Electrical interface
Number of stations
Communication cable

Table 1-1 J.NET module specifications

Item

Table 1-2 Communication specifications

Item
Serial (bit serial) transmission
RS-485
A maximum of 31 stations per network (62 stations per module)
Two pairs of shielded twisted-pair cables
Line type Recommended cable: KPEV-SB 2P 0.5mm
The distance depends on the transmission rate as follows:
Distance
Terminal block 11-point (M3 screw), fixed type
Specifications
LQE540-E
2 networks per module
4 modules per CPU unit
370 g or less
900 mA or less
Not supported
Specifications
(Hitachi Metals, Ltd)
Transmission rate ≤ 1.0 Mbps: Maximum 240 m
Transmission rate ≤ 0.5 Mbps: Maximum 480 m
Transmission rate ≤ 0.25 Mbps: Maximum 800 m
Transmission rate ≤ 0.125 Mbps: Maximum 1,000 m
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1. Specifications
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