28 | ST43401N/ND, ST43402ND User’s Manual, Rev. B |
= Jumper | J01B |
connected | Port B I/O |
|
= Jumper not connected
=
J03
Enable/Disable Port A (EPA)
Ground (GND)
Enable/Disable Port B (EPB)
Ground (GND)
J01A
Port A I/O
| EPA |
| J01 |
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| GND |
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Enable/Disable Port A | EPB | GND | (A & B) |
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| 4 |
| 3 |
Enable Port A |
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| 2 |
| 1 |
Disable Port A |
| Terminator Power J01A is for | 4 | 3 | |
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| Port A and J01B is for Port B. | |||
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| Assign the terminal power | 2 | 1 | |
Enable/Disable Port B |
| jumpers as shown below. |
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Enable Port B |
| Internal terminator power source. |
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| External terminator power source. |
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Disable Port B |
| Internal terminator power to I/O. |
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Enable Port A and Port B
Simultaneously
Use jumpers to connect the four pins as illustrated.