Last Modified: March 21, 2017
Table 1. Signal Descriptions
Signal |
Direction |
Description |
P0.<0..7>+, P0.<0..7>– |
Input |
Isolated Input Port 0 Terminals—Take measurements at the positive terminal. A logic high (data bit of 1) indicates sufficient input voltage and current are present. The negative terminal serves as the reference from which the port line is measured. |
P1.<0..7>+, P1.<0..7>– |
Input |
Isolated Input Port 1 Terminals—Take measurements at the positive terminal. A logic high (data bit of 1) indicates sufficient input voltage and current are present. The negative terminal serves as the reference from which the port line is measured. |
P2.<0..7>+, P2.<0..7>– |
Input |
Isolated Input Port 2 Terminals—Take measurements at the positive terminal. A logic high (data bit of 1) indicates sufficient input voltage and current are present. The negative terminal serves as the reference from which the port line is measured. |
+5 V |
Output |
+5 V Power Source—
Provides +5 VDC power. These terminals are not isolated. |
GND |
— |
Ground—These terminals are connected to the computer ground reference. These terminals are not isolated. |
P3.<0..7>+, P3.<0..7>– |
Output |
Isolated Output Port 3 First and Second Terminals—The positive terminal is the first of two terminals of a bi-directional solid-state relay. The connection is complete when the relay is closed. The connection is broken when the relay is open. A logic low (data bit of 0) closes the relay. The negative terminal is the second of two terminals of a bi-directional solid-state relay. A logic low (data bit of 0) closes the relay. |
P4.<0..7>+, P4.<0..7>– |
Output |
Isolated Output Port 4 First and Second Terminals—The positive terminal is the first of two terminals of a bi-directional solid-state relay. The connection is complete when the relay is closed. The connection is broken when the relay is open. A logic low (data bit of 0) closes the relay. The negative terminal is the second of two terminals of a bi-directional solid-state relay. A logic low (data bit of 0) closes the relay. |
P5.<0..7>+, P5.<0..7>– |
Output |
Isolated Output Port 5 First and Second Terminals—The positive terminal is the first of two terminals of a bi-directional solid-state relay. The connection is complete when the relay is closed. The connection is broken when the relay is open. A logic low (data bit of 0) closes the relay. The negative terminal is the second of two terminals of a bi-directional solid-state relay. A logic low (data bit of 0) closes the relay. |
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