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Counters: H7ER Tachometers

FAQ No. FAQ03180

Primary Contents

Question

What is a substitute product for old H7ER Tachometers?

Answer

1.It depends on H7ER model. Refer to the following table.

DisplayLCD (character height: 6.7 mm)
Operating modeIncremental type
Mounting methodFlush mountingDirect
mounting
on PC board
Count inputNo-voltageDC voltageNo-voltageDC voltage
Number of digits445544, 5
Screw
terminals
Applicable
encoder
resolution
1 P/RH7ER-BH7ER-BV------
10 P/RH7ER-BV1
60 P/RH7ER-B2H7ER-BV2
600 P/RH7ER-BV3
ntlpH7ER-SBV
Wire-wrap
terminals
1 P/RH7ERH7ER-V---------
10 P/RH7ER-V1
60 P/RH7ER-V2
600 P/RH7ER-V3
DIP
terminals
1 P/R------------H7ER-PH7ER-VP
60 P/RH7ER-V2P
(1)
H7ER-N
(2)
H7ER-NV
(3)
H7ER-NV1
(4)
K3NR ntlp
(5)
H7ER-N ntlp

Note: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 H7ER-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.

3.The substitute product in column (2) is H7ER-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.

4.The substitute product in column (3) is H7ER-NV1.

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.
The maximum revolution displayed must be adjusted using the counting speed switch.

5.There is no substitute in column (4) because H7ER-N series do not have wide range encoders.

The function can be replicated using a pre-scaling function such as the one provided by K3NR Digital Panel Indicator but the size will be significantly different.

6.There is no substitute in column (5) because H7ER-N series do not have PC board mounting models.

However, H7ER-N can be used in place of H7ER-P, H7ER-NV in place of H7ER-VP, and H7ER-NV1 in place of H7ER-V2P, if the mounting methods are not considered.

7.General Comparison of H7ER and H7ER-N

Compared itemH7ERH7ER-N
Number of digits4/54/5
Character height6.7 mm8.6 mm
Max. revolutions
displayed
4 digits fixed: H7ER-B, -BV, -B2, etc.
5 digits fixed: H7ER-BV1, -BV2, -BV3N, etc.
4 digits fixed: H7ER-N, -NV
5 digits, counting speed switch method: H7ER-NV1
Battery replacementNot possiblePossible (no PCB mounting models)