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What Is A Substitute Product For Old H7A Digital Counters?


1.It depends on the H7A model. Refer to the following table.

Type Preset counter Totalizer
Operating mode Incremental type
External connections Screw terminal
Number of digits 2 4 6 8 4 8
Without backup function H7A-2
H7A-2D
H7A-4
H7A-4D
H7A-6
H7A-6D
H7A-8
H7A-8D
H7A-T4 H7A-T8
  (1)
H7AN-2D
(2)
H7AN-4D
(3)
H7AN-R6D
(4)
H7AN-R8D
(5)
H7AN-T4
(6)
H7AN-RT8
With backup function H7A-2M
H7A-2DM
H7A-4M
H7A-4DM
H7A-6M
H7A-6DM
H7A-8M
H7A-8DM
H7A-T4M H7A-T8M
  (7)
H7AN-2DM
(8)
H7AN-4DM
(9)
H7AN-R6DM
(10)
H7AN-R8DM
(11)
H7AN-T4M
(12)
H7AN-RT8M

Note:

1.Preset Counters without "D" do not display the present value. Models with "D" have number displaying functions. The recommended substitute products all have number displaying functions.

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 100 to 240 VAC H7AN-2D Preset Counters.

3.The substitute product in column (2) is 100 to 240 VAC H7AN-4D Preset Counters.

4.The substitute product in column (3) is 100 to 240 VAC H7AN-R6D Preset Counters.

However, half of the panel cutout must be re-built.

5.The substitute product in column (4) is 100 to 240 VAC H7AN-R8D Preset Counters.

However, half of the panel cutout must be re-built.

6.The substitute product in column (5) is 100 to 240 VAC H7AN-T4 Totalizing Counters.

7.The substitute product in column (6) is 100 to 240 VAC H7AN-RT8 Totalizing Counters.

However, half of the panel cutout must be re-built.

8.The substitute product in column (7) is 100 to 240 VAC H7AN-2DM Preset Counters.

9.The substitute product in column (8) is 100 to 240 VAC H7AN-4DM Preset Counters.

10.The substitute product in column (9) is 100 to 240 VAC H7AN-6DM Preset Counters.

However, half of the panel cutout must be re-built.

11.The substitute product in column (10) is 100 to 240 VAC H7AN-R8DM Preset Counters.

However, half of the panel cutout must be re-built.

12.The substitute product in column (11) is 100 to 240 VAC H7AN-T4M Totalizing Counters.

13.The substitute product in column (12) is 100 to 240 VAC H7AN-RT8M Totalizing Counters.

However, half of the panel cutout must be re-built.

14.General Comparison of H7A and H7AN

Compared item H7A H7AN Remarks
Power supply 100/200, 110/220, 115, 230 VAC
24 VAC
100 to 240 VAC
12 to 24 VDC
See
note 1.
Operating
method
Incremental type Switch between incrementing (Up) and decrementing (Down)
Incrementing (Up), Decrementing (Down), or Reversible (Up/Down)
Reversible (Up/Down)
See
note 2.
Front panel 2- or 4-digit model: W72 x H72
6- or 8-digit model: W144 x H72
2-, 4-, 6-, or 8-digit model: W72 x H72 See
note 3.
Number of
I/O terminals
2- or 4-digit model: 12 terminals
6- or 8-digit model: 15 terminals
2-, 4-, 6-, or 8-digit model: 14 terminals See
note 4.

Note:

1.There is no substitute product for the 24 VAC model because there are no 24 VAC H7AN models. Step up the voltage with a transformer and use 100 to 240 VAC model or see whether 24 VAC/12 to 24 VDC H7BR Digital Counters can be used.

2.H7A is an incrementing counter. For H7AN 2-digit or 4 digit counter, set the UP-DOWN switch to UP, and for H7AN 6-digit or 8-digit counter, set the counting function selector to UP. These are the default settings.

3.The panel cutout for the front panel with dimensions W72, H72 are compatible.

4.Be careful because the terminal numbers are not compatible.




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Created 2009-01-16
Modified 2009-01-16
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