A MELSEC-Q Series MELSECNET/H Unit

MITSUBISHI

MELSECNET/H network unit.
[Features]
· A large-scale and flexible network system can be configured.
· Includes a remote I/O network for communication between PCs and between remote stations.
· Optical loop system, coaxial bus system and twist bus system.
[Applications]
· For connections with field networks.

MELSECNET/H Network Unit Features

The MELSECNET/H network unit lets you build a large-scale, flexible network system.
A MELSECNET/H network system may be a PC-PC network for communication between an administration station and a normal station, or a remote I/O network for communication between a remote master station and a remote I/O station.
Optical loop system: High-speed communication at 10 Mbps / 25 Mbps is achieved. To support a long distance between stations / long total distance, the noise resistance is high.
Coaxial bus system: A system can be built with lower cost than what an optical loop system needs because inexpensive coaxial cables are used.
Twist bus system: A low-cost network system can be built by combining affordably-priced network units and twisted paired cables.

MELSECNET/H Network Unit Specifications

Item			Specifications
Network System			Optical Loop System		Coaxial Bus System		Twist Bus System
Type Name			QJ71LP21(S)-25 QJ72LP25-25	QJ71LP21G QJ72LP25G	QJ71BR11 QJ72BR15		QJ71NT11B
Connection Cable			Optical Fiber Cable (SI)	Optical Fiber Cable (GI)	Coaxial Cable (3C-2V)	Coaxial Cable (5C-2V)	Twisted Paired Cable	CC-Link Dedicated Ver. 1.10 Supported Cable
Network Between PCs	Maximum Link Points Per Network	LB	16,384 points (8,192 points in MELSECNET / 10 mode)				16,384 points
		LW	16,384 points (8,192 points in MELSECNET / 10 mode)				16,384 points
		LX/LY	8,192 points
	Maximum Link Points Per Station		· MELSECNET/H mode, MELSECNET/10 mode (excluding twisted bus system) {(LY + LB) / 8 + (2 × LW)} ≤ 2,000 bytes · MELSECNET/H Expansion Mode {(LY + LB) / 8 + (2 × LW)} ≤ 35,840 bytes
	Number of Connected Stations Per Network		64 stations (Administration stations: 1, Normal stations: 63)		32 stations (Administration stations: 1, Normal stations: 31)
Remote I/O Network	Maximum Link Points Per Network	LB	16,384 points (Remote master station > Remote sub-master station or remote I/O station: 8,192 points, Remote sub-master station or remote I/O station > Remote master station: 8,192 points)				-
		LW	16,384 points (Remote master station > Remote sub-master station or remote I/O station: 8,192 points, Remote sub-master station or remote I/O station > Remote master station: 8,192 points)
		LX/LY	8,192 points
	Maximum Link Points Per Station		· Remote master station > Remote I/O station ((LY + LB) / 8 + (2 × LW)) ≤ 1,600 bytes · Remote I/O station > Remote master station ([LX + LB] / 8 + [2 × LW]) ≤ 1,600 bytes · Multiplex remote master station from/to Multiplex remote sub-master station ([LY + LB] / 8 + [2 × LW]) ≤ 2,000 bytes
	Maximum Input/Output Points Per Remote I/O Station		X + Y ≤ 4,096 points If there is an identical number on X side and Y side, it is counted as a point only on one side.
	Number of Device Points Per Remote I/O Station	M	8,192 points
		SM	2,048 points
		D	12,288 points
		SD	2,048 points
	Number of Connected Stations Per Network		65 stations (Remote master stations: 1, Remote I/O stations: 64)		33 stations (Remote master stations: 1, Remote I/O stations: 32)
Communication Speed			25 Mbps / 10 Mbps	10 Mbps			156 Kbps / 312 kbps / 625 kbps / 1.25 Mbps / 2.5 Mbps / 5 Mbps / 10 Mbps
Total Extension Distance			30 km		300 m	500 m	1,200 m / 156 kbps, 600 m / 312 kbps, 400 m / 625 kbps, 200 m / 1.25 Mbps	1,200 m / 156 kbps, 900 m / 312 kbps, 600 m / 625 kbps, 400 m / 1.25 Mbps, 200 m / 2.5 Mbps, 150 m / 5 Mbps, 100 m / 10 Mbps
Distance Between Stations			Maximum 1 km	2 km	-		-