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| + | == Overview == |
| + | |
| + | Mesa 25-pin daughterboard that features 5x RS-422 transceivers (transmit/receive pairs and 5V power) for SmartSerial expansion, as well as 4x RS-422/TTL receivers for encoders. |
| + | |
| + | There also exists a 7i85S that has two transmit channels per connector rather than TX/RX channels, making it suitable for step/direction output in addition to encoder feedback. |
| + | |
| + | == Wiring == |
| + | |
| + | === SmartSerials === |
| + | |
| + | {| class="wikitable" |
| + | ! TB Pin |
| + | ! RJ45 Color |
| + | ! Function |
| + | ! Direction |
| + | ! Notes |
| + | |- |
| + | | 1 |
| + | | style="background-color: #0080ff" | blue |
| + | | GND |
| + | | 7i85 → SS |
| + | | |
| + | |- |
| + | | 2 |
| + | | style="background: repeating-linear-gradient(45deg, #0080ff, #0080ff 10px, #ffffff 10px, #ffffff 20px);" | blue-stripe |
| + | | GND |
| + | | 7i85 → SS |
| + | | |
| + | |- |
| + | | 3 |
| + | | style="background-color: #00ff80" | green |
| + | | RX+ |
| + | | 7i85 ← SS |
| + | | idle = low |
| + | |- |
| + | | 4 |
| + | | style="background: repeating-linear-gradient(45deg, #00ff80, #00ff80 10px, #ffffff 10px, #ffffff 20px);" | green-stripe |
| + | | RX- |
| + | | 7i85 ← SS |
| + | | idle = high |
| + | |- |
| + | | 5 |
| + | | style="background-color: #ff8000" | orange |
| + | | TX+ |
| + | | 7i85 → SS |
| + | | idle = low |
| + | |- |
| + | | 6 |
| + | | style="background: repeating-linear-gradient(45deg, #ff8000, #ff8000 10px, #ffffff 10px, #ffffff 20px);" | orange-stripe |
| + | | TX- |
| + | | 7i85 → SS |
| + | | idle = high |
| + | |- |
| + | | 7 |
| + | | style="background: repeating-linear-gradient(45deg, #8b4513, #8b4513 10px, #ffffff 10px, #ffffff 20px);" | brown-stripe |
| + | | +5V |
| + | | 7i85 → SS |
| + | |- |
| + | | 8 |
| + | | style="background-color: #8b4513" | brown |
| + | | +5V |
| + | | 7i85 → SS |
| + | |} |
| + | |
| + | === Encoders === |
| + | |
| + | {| class="wikitable" |
| + | ! TB Pin |
| + | ! Function |
| + | ! Direction |
| + | ! RS-422 Mode |
| + | ! TTL Mode |
| + | |- |
| + | | 1 |
| + | | A+ |
| + | | 7i85 ← Encoder |
| + | | active high (compared to A-) |
| + | | TTL input w/ pull-up |
| + | |- |
| + | | 2 |
| + | | A- |
| + | | 7i85 ← Encoder |
| + | | active low (compared to A+) |
| + | | shorted to A+ via 150Ω resistor |
| + | |- |
| + | | 3 |
| + | | GND |
| + | | 7i85 ↔ Encoder |
| + | | |
| + | | |
| + | |- |
| + | | 4 |
| + | | B+ |
| + | | 7i85 ← Encoder |
| + | | active high (compared to B-) |
| + | | TTL input w/ pull-up |
| + | |- |
| + | | 5 |
| + | | B- |
| + | | 7i85 ← Encoder |
| + | | active low (compared to B+) |
| + | | shorted to B+ via 150Ω resistor |
| + | |- |
| + | | 6 |
| + | | +5V |
| + | | 7i85 → Encoder |
| + | | |
| + | | |
| + | |- |
| + | | 7 |
| + | | Z+ |
| + | | 7i85 ← Encoder |
| + | | active high (compared to Z-) |
| + | | TTL input w/ pull-up |
| + | |- |
| + | | 8 |
| + | | Z- |
| + | | 7i85 ← Encoder |
| + | | active low (compared to Z+) |
| + | | shorted to Z+ via 150Ω resistor |
| + | |} |
| + | |
| == Bill of Materials == | | == Bill of Materials == |
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