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1. Specifications
1-1
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
Table 1-1 J.NET module specifications
Item
Specifications
Model
LQE540-E
Number of networks
2 networks per module
Maximum mountable number of modules
4 modules per CPU unit
Weight
370 g or less
Current consumption
900 mA or less
Hot swapping
Not supported
1.2.2 Communication specifications
Table 1-2 Communication specifications
Item
Specifications
Transmission method
Serial (bit serial) transmission
Electrical interface
RS-485
Number of stations
A maximum of 31 stations per network (62 stations per module)
Communication cable
Line type
Two pairs of shielded twisted-pair cables
Recommended cable: KPEV-SB 2P 0.5mm
2
(Hitachi Metals, Ltd)
Distance
The distance depends on the transmission rate as follows:
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
Terminal block
11-point (M3 screw), fixed type
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