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What Is A Substitute Product For Old H7EC Total Counters?
1.It depends on the H7EC 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 |
H7EC-B
H7EC-BL |
H7EC-BM
H7EC-BLM |
H7EC-BV
H7EC-BVL |
H7EC-BVM
H7EC-BVLM |
H7EC-FBV |
--- |
Wire-wrap
terminals |
H7EC
H7EC-L |
H7EC-M
H7EC-LM |
H7EC-V
H7EC-VL |
H7EC-VM
H7EC-VLM |
--- |
--- |
DIP
terminals |
--- |
--- |
--- |
H7EC-P
H7EC-LP |
| |
(1)
H7EC-N |
(2)
H7EC-NV |
(3)
H7EC-NFV |
(4)
H7EC-NP
H7EC-NLP |
Note:
1.Model numbers with "L" have a maximum counting speed of 30 Hz (cps). Other models are 1 kHz (cps). Only the models with a 20-Hz maximum counting speed have multi-voltage inputs.
2.The bottom row gives recommended substitute products or models with substitute functions. For details, refer to the following information.
2.The substitute product in column (1) is H7EC-N.
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.
If the maximum counting speed was 1 kHz (cps), the counting speed switch must be set to 1 kHz (cps).
3.The substitute product in column (2) is H7EC-NV.
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.
If the maximum counting speed was 1 kHz (cps), the counting speed switch must be set to 1 kHz (cps).
4.The substitute product in column (3) is H7EC-NFV.
If the high level was 6 to 24 VDC, H7EC-NV with DC voltage input must be used because if the DC high level of H7EC-FBV with multi-voltage input was 6 to 240 VDC, it becomes 24 to 240 VDC for H7EC-NFV.
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.
5.There are two substitute products in column (4). The substitute product for H7EC-P is H7EC-NP, and H7EC-NLP for H7EC-LP because Totalizers with direct mounting on the PC board do not have the counter speed switch.
6.General Comparison of H7EC and H7EC-N
| Compared item |
H7EC |
H7EC-N |
Remarks |
| Number of digits |
6/7 |
8 |
|
| Character height |
6.7 mm |
8.6 mm |
|
| 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: Reset - Glossary of Industrial Automation">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 (except for PCB mounting models) |
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Note:
1.The high level 6 to 24 VDC of H7EC-N is cut, so choose a DC voltage input model.
2.Be careful when using the power-OFF reset.
Link:
http://www.myomron.com/index.php?action=kb&print=952
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