Hitachi NJI-350B manual Point Basic Unit, EH-*14

Chapter 4 Product lineup and wiring

4.3 14-Point Basic Unit

Name and function of each part	Type	EH-*14***
10] Terminal cover		5] Input terminals
		1] POW LED
		2] OK LED
		3] RUN LED
11] Mounting hole		8] Expansion
		connector cover
		9] DIP SW cover
		6] Output terminals
4] Serial port cover	12] DIN rail installation clip
	7] Power terminal

No.	Item	Detailed explanation			Remarks
Explanation of operation		Operations are performed according to the contents of the program created
		by the user.
		The programming unit connected to the CPU module communication port
		writes and reads the user programs.
		Memory is installed inside the CPU module in which the user programs and
		internal output information are stored.
1]	POW LED	Lighting when the power is supplied.
2]	OK LED	Lighting at normal operation.			See Chapter 12.
3]	RUN LED	Lighting at RUN status.
4]	Serial port cover	Cover for the connector for connecting			See Chapters 8 and 11.
			STOP	RUN
		peripheral units and the RUN switch.
		When the cover is opened, the RUN switch,
			VR1	VR2
		potentiometers (VR), and RS-232C serial port 1
		(PORT 1) can be used.
			PORT1
		The communication specification is set to port 1.
5]	Input terminals	Terminals for wiring the external input units.			See Chapter 10.
		Recommended terminals are shown in the		6	(Make sure that the terminals will not
		figure to the right.			disengage due to loose screws.)
		One piece of AWG14 to AWG22 (2.1 to
		0.36 mm2) or two pieces of AWG16 to		6	(Recommended)
		AWG22 (1.3 to 0.36 mm2) per terminal may
		be wired.
6]	Output terminals	Terminals for connecting the external load.			See Chapter 10.
		The wiring specification is the same as for the input terminals.
7]	Power terminal	Terminal for connecting the power supply.			See Chapter 10.
		The wiring specification is the same as for the input terminals.
8]	Expansion cover	Cover for the expansion connector			See Chapter 10.
9]	DIP SW cover	Cover for the DIP switches			See Chapter 11.
		When the cover is opened, the DIP switches are exposed. These DIP
		switches are used to set the communication speed of serial port 1 and the
		modem connection.
10]	Terminal cover	Cover for terminals
11]	Mounting hole	Used when installing the PLC with screws			See Chapter 10.
12]	DIN rail	Used when installing the PLC on a DIN rail			See Chapter 10.
	installation clip

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