Hitachi NJI-350B manual Expansion Unit, Name and function of each part

Chapter 4 Product lineup and wiring

4.5 Expansion Unit

Name and function of each part

9] Terminal cover

10] Mounting hole

3] Expansion connector cover (left side)

Type	EH-*14ED** (same dimension as 14 pts. basic unit)
	EH-*28ED** (same dimension as 28 pts. basic unit)
	EH-*6EAN (same dimension as 14 pts. basic unit)

4] Input terminals

1] POW LED

2] OK LED

7] Expansion connector cover (right side)

8] Dummy cover

5] Output terminals

11] DIN rail installation clip

6] Power terminal

			Above picture is 14 points module
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 program.
		Memory is installed inside the CPU module in which the user program and
		internal output information are stored.
1]	POW LED	Lighting when the power is supplied.
2]	OK LED	Lighting at normal operation.
3]	Expansion cover	Cover for expansion connector		See Chapter 10.
	(Left side)	Used when connecting to the expansion cable from the front unit.
4]	Input terminals	Terminals for wiring the external input units.		See Chapter 10.
		Recommended terminals are shown in the figure	6	(Make sure that the terminals will not
		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 AWG22 (1.3	6	(Recommended)
		to 0.36 mm2) per terminal may be wired.
5]	Output terminals	Terminals for connecting the external load. The wiring specification is the		See Chapter 10.
		same as for the input terminals.
6]	Power terminal	Terminal for connecting the power supply. The wiring specification is the		See Chapter 10.
		same as for the input terminals.
7]	Expansion cover	Cover for expansion connector		See Chapter 10.
	(Right side)	Used when connecting to the next unit.
8]	Dummy cover	Cover used as a dummy.
9]	Terminal cover	Cover for terminals
10]	Mounting hole	Used when installing the PLC with screws		See Chapter 10.
11]	DIN rail	Used when installing the PLC on a DIN rail		See Chapter 10.
	installation clip

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