1. AS311 Overview
SW3
1
2
3
RS-232C/RS-422 selection switches (for channel 1)
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| Used to select the interface of the channel 1 either | |||
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| No.1 |
| OFF | ON |
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| Interface |
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| Used to connect the terminating resistor (120 Ω ) | |||
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| between RXDA and RXDB. (Effective for | |||
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| No.2 |
| OFF | ON | ||
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| SW3 |
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| Terminating |
| Not connect | Connect |
Used to connect the terminating resistor (120 Ω ) between CTSA and CTSB. (Effective for
No.3 | OFF | ON |
Terminating | Not connect | Connect |
NOTE The switches No.2 and No.3 should be set to ON when the AS311 is configured as terminal station on the
RSW1/RSW2 Optional rotary switches
RSW1
RSW2
C
8 0
4 C
80
4
Always set the RSW1 to 4 and the RSW2 to 0. (Other settings are for future use)
Do not set other than above, otherwise the AS311 will not work correctly.
12 ASCII Interface Module (AS311)