FAQ03177 of Counters FAQ

FAQ No. FAQ03177

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Question

What is a substitute product for old H7ET Time Counters?

Answer

1. It depends on H7ET model. Refer to the following table.

Display		LCD (character height: 6.7 mm)
Operating mode		Incremental type
Mounting method		Flush mounting					Direct mounting on PC board
Count input		No-voltage input		DC voltage input		Multi-voltage	No-voltage input
Reset method		External	External/Manual	External	External/Manual	External	External, Power-OFF
Number of digits		7	6	7	6	7	7
External connections	Screw terminals	H7ET-B H7ET-B1 H7ET-B2 H7ET-B3	H7ET-BM	H7ET-BV H7ET-BV1 H7ET-BV2 H7ET-BV3	H7ET-BVM	H7ET-FBV H7ET-FBV1 H7ET-FBV2 H7ET-FBV3	---
	Wire-wrap terminals	H7ET	H7ET-M	H7ET-V	H7ET-VM	---	---
	DIP terminals	---		---		---	H7ET-P
		(1) H7ET-N H7ET-N1		(2) H7ET-NV H7ET-NV1		(3) H7ET-NFV H7ET-NFV1	(4) H7ET-NP

Note:

1.Discontinued models with no number indicate that the time is displayed in hours. Models with the suffix "1" indicate that the time is displayed in hours, minutes, and seconds. The suffix "2" indicates hours and minutes, and the suffix "3" indicates days and hours.

2.The bottom row gives recommended substitute products or models with substitute functions. For details, see the following information.

2.If H7ET-B1 or H7ET-B2 was used, the substitute product is H7ET-N1 with time display units switchable between h/min/s and h/min. If other models were used, the substitute product is H7ET-N with time display units switchable between h and day/h. (See column (1).)
If a wire-wrap terminal was used, Y92S-37 Wire-wrap Terminals (two in one set) must be separately purchased and attached to the terminal block.
If manual reset is not used, the key-protect switch must be set to ON.
The time display unit must be set using the time-range switch.

3.If H7ET-BV1 or H7ET-BV2 was used, the substitute product is H7ET-NV1 with time display units switchable between h/min/s and h/min. If other models were used, the substitute product is the H7ET-NV with time display units switchable between h and day/h. (See column (2).)
If a wire-wrap terminal was used, Y92S-37 Wire-wrap Terminals (two in one set) must be separately purchased and attached to the terminal block.
If manual reset is not used, the key-protect switch must be set to ON.
The time display unit must be set using the time-range switch.

4.If the H7ET-FBV1 or H7ET-FBV2 was used, the substitute product is H7ET-NFV1 with time display units switchable between h/min/s and h/min. If other models were used, the substitute product is H7ET-NFV with time display units switchable between h and day/h. (See column (3).)
If the high level was 6 to 24 VDC, H7ET-NV or H7ET-NV1 with DC voltage input must be used because if the DC high level of H7ET-FBV with multi-voltage input was 6 to 240 VDC, it becomes 24 to 240 VDC for H7EC-NFV.
If manual reset is not used, the key-protect switch must be set to ON.
The time display unit must be set using the time-range switch.

5.The substitute product in column (4) is H7ET-NP.

6.General Comparison of H7ET and H7ET-N

Compared item	H7ET	H7ET-N	Remarks
Number of digits	6/7	7
Character height	6.7 mm	8.6 mm
Time display Unit Model number	None: Hour 1: Hour/Minute/Second 2: Hour/Minute 3: Day/Hour	None: Switchable between Hour and Day/Hour 1: Switchable between Hour/Minute/Second and Hour/Minute PCB mounting models: Hour display only
Input signal level	DC voltage input High level: 4.5 to 30 VDC Low level: 0 to 2 VDC Multi-voltage input High level: 24 to 240 VAC/6 to 240 VDC Low level: 0 to 1.5 VAC/0 to 2 VDC	DC voltage input High level: 4.5 to 30 VDC Low level: 0 to 2 VDC Multi-voltage input High level: 24 to 240 VAC/VDC Low level: 0 to 2.4 VAC/VDC	See note 1
Reset system	Non-PCB mounting model: External reset only, external/manual reset PCB mounting model: Power-OFF reset: 100 ms min.	Non-PCB mounting model: External/Manual reset (manual reset system has key-protect switching) PCB mounting model: Power-OFF reset: 500 ms min.	See note 2
Battery replacement	Not possible	Possible (Externally mounted for PCB mounting models)