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Landing list

One row per screw. 82 conductors from the four ribbons, plus the axis D-subs and the home switches. Generated from the allocation in mesa-allocation and the ribbon way map, so it cannot drift from either.

🔴 Within every group, way number equals terminal number. Ways 1-8 land on terminals 1-8 or 17-24, ways 9-16 on 9-16, ways 17-24 on 1-8 of the next block. Nothing to look up while wiring.

⚠️ Rows marked not used have no conductor. Skip the wire and leave the terminal empty - do not close the gap, or every way after it lands one screw out. Those terminals become spare outputs.

🔴 Check the 7I77U board revision first. On Rev A the TB7 and TB8 silkscreen labels are swapped. Label both blocks with tape from the manual before starting.

7I76EU · TB5

Carries CN13.

Term Mesa signal From Way Colour Wire What
17 OUTPUT8 OF.41 CN13 1 brown 1 A1 Carousel enable
18 OUTPUT9 OF.42 CN13 2 red 1 A2 Carousel go-to-position command
19 OUTPUT10 OF.43 CN13 3 orange 1 A3 Carousel position, bit 1
20 OUTPUT11 OF.44 CN13 4 yellow 1 A4 Carousel position, bit 2
21 OUTPUT12 OF.45 CN13 5 green 1 A5 Carousel position, bit 3
22 OUTPUT13 OF.46 CN13 6 blue 1 A6 Carousel position, bit 4
23 OUTPUT14 OF.47 CN13 7 purple 1 A7 Carousel position, bit 5
24 OUTPUT15 OF.48 CN13 8 grey 1 A248 Router motor

7I76EU · TB6

Carries CN10.

Term Mesa signal From Way Colour Wire What
17 OUTPUT0 OF.1 CN10 17 purple 2 A201 Controller healthy (watchdog)
18 OUTPUT1 OF.2 CN10 18 grey 2 A202 Workpiece RELEASE, zone 1
19 OUTPUT2 OF.3 CN10 19 white 2 A203 Workpiece RELEASE, zone 2
20 OUTPUT3 OF.4 ⚠️ CN10 20 black 2 — not used —
21 OUTPUT4 OF.5 ⚠️ CN10 21 brown 3 — not used —
22 OUTPUT5 OF.6 CN10 22 red 3 A206 Y datum stop, field E
23 OUTPUT6 OF.7 CN10 23 orange 3 A207 Y datum stop, field H
24 OUTPUT7 OF.8 CN10 24 yellow 3 A208 Zone 1 lamp

Also on TB6, not from a ribbon:

Term Mesa signal Wire What
1 INPUT0 `` Spindle speed feedback - VFD AM to AC, analog in — optional, see mesa-allocation
5 INPUT4 137 Home switch X - BOX — CONN.X pin 6
6 INPUT5 138 Home switch Y - BOY — CONN.Y pin 6
7 INPUT6 139 Home switch Z - BOZ — CONN.Z pin 6

7I77U · TB7

Carries CN13, CN4.

Term Mesa signal From Way Colour Wire What
1 INPUT16 IF.25 CN4 17 purple 2 E125 Spindle at speed (N.O.)
2 INPUT17 IF.26 CN4 18 grey 2 E126 Horizontal borer 1 retracted (N.O.)
3 INPUT18 IF.27 CN4 19 white 2 E127 Horizontal borer 2 retracted (N.O.)
4 INPUT19 IF.28 CN4 20 black 2 E128 Horizontal borer 3 retracted (N.O.)
5 INPUT20 IF.29 CN4 21 brown 3 E129 End-cycle button (N.C.)
6 INPUT21 IF.30 CN4 22 red 3 E130 Jog minus (N.O.)
7 INPUT22 IF.31 CN4 23 orange 3 E131 Jog rapid (N.O.)
8 INPUT23 IF.32 CN4 24 yellow 3 E132 Jog plus (N.O.)
17 OUTPUT8 OF.25 CN13 17 purple 2 A225 Vertical drill 7 down
18 OUTPUT9 OF.26 CN13 18 grey 2 A226 Vertical drill 8 down
19 OUTPUT10 OF.27 CN13 19 white 2 A227 Vertical drill 9 down
20 OUTPUT11 OF.28 CN13 20 black 2 A228 Vertical drill 10 down
21 OUTPUT12 OF.29 CN13 21 brown 3 A229 X datum stop, zone 1
22 OUTPUT13 OF.30 CN13 22 red 3 A230 X datum stop, zone 2
23 OUTPUT14 OF.31 ⚠️ CN13 23 orange 3 — not used —
24 OUTPUT15 OF.32 ⚠️ CN13 24 yellow 3 — not used —

7I77U · TB8

Carries CN13, CN4.

Term Mesa signal From Way Colour Wire What
1 INPUT0 IF.41 ⚠️ CN4 1 brown 1 — not used —
2 INPUT1 IF.42 ⚠️ CN4 2 red 1 — not used —
3 INPUT2 IF.43 CN4 3 orange 1 E143 ATC gripper up (N.O.)
4 INPUT3 IF.44 CN4 4 yellow 1 E144 ATC gripper down (N.O.)
5 INPUT4 IF.45 CN4 5 green 1 E145 Oil level low (N.C.)
6 INPUT5 IF.46 CN4 6 blue 1 E146 Carousel homed at pocket 1 (N.O.)
7 INPUT6 IF.47 ⚠️ CN4 7 purple 1 — not used —
8 INPUT7 IF.48 ⚠️ CN4 8 grey 1 — not used —
9 INPUT8 IF.33 CN4 9 white 1 E133 Photocell, zone 1 (N.C.)
10 INPUT9 IF.34 CN4 10 black 1 E134 Photocell, zone 2 (N.C.)
11 INPUT10 IF.35 CN4 11 brown 2 E135 Carousel in position (N.O.)
12 INPUT11 IF.36 CN4 12 red 2 E136 Carousel position echo, bit 1 (N.O.)
13 INPUT12 IF.37 CN4 13 orange 2 E137 Carousel position echo, bit 2 (N.O.)
14 INPUT13 IF.38 CN4 14 yellow 2 E138 Carousel position echo, bit 3 (N.O.)
15 INPUT14 IF.39 CN4 15 green 2 E139 Carousel position echo, bit 4 (N.O.)
16 INPUT15 IF.40 CN4 16 blue 2 E140 Carousel position echo, bit 5 (N.O.)
17 OUTPUT0 OF.33 ⚠️ CN13 9 white 1 — not used —
18 OUTPUT1 OF.34 ⚠️ CN13 10 black 1 — not used —
19 OUTPUT2 OF.35 CN13 11 brown 2 A235 ATC gripper up
20 OUTPUT3 OF.36 CN13 12 red 2 A236 ATC gripper down
21 OUTPUT4 OF.37 CN13 13 orange 2 A237 Zone 2 lamp
22 OUTPUT5 OF.38 CN13 14 yellow 2 A238 Ball-screw nut lubrication
23 OUTPUT6 OF.39 ⚠️ CN13 15 green 2 — not used —
24 OUTPUT7 OF.40 CN13 16 blue 2 A240 Tool release (spindle drawbar)

7I84U · TB2

Carries CN1, CN10.

Term Mesa signal From Way Colour Wire What
1 INPUT16 IF.1 CN1 17 purple 2 E101 Start button, zone 1 (N.O.)
2 INPUT17 IF.2 CN1 18 grey 2 E102 Start button, zone 2 (N.O.)
3 INPUT18 IF.3 CN1 19 white 2 E103 Clamp pedal, zone 1 (N.O.)
4 INPUT19 IF.4 CN1 20 black 2 E104 Clamp pedal, zone 2 (N.O.)
5 INPUT20 IF.5 ⚠️ CN1 21 brown 3 — not used —
6 INPUT21 IF.6 ⚠️ CN1 22 red 3 — not used —
7 INPUT22 IF.7 CN1 23 orange 3 E107 Hold / feed hold (N.C.)
8 INPUT23 IF.8 CN1 24 yellow 3 E108 Emergency stop chain (N.C.)
17 OUTPUT8 OF.9 CN10 9 white 1 A209 Drill block motor
18 OUTPUT9 OF.10 CN10 10 black 1 A210 Vertical drill 1 down
19 OUTPUT10 OF.11 CN10 11 brown 2 A211 Vertical drill 2 down
20 OUTPUT11 OF.12 CN10 12 red 2 A212 Vertical drill 3 down
21 OUTPUT12 OF.13 CN10 13 orange 2 A213 Vertical drill 4 down
22 OUTPUT13 OF.14 CN10 14 yellow 2 A214 Vertical drill 5 down
23 OUTPUT14 OF.15 CN10 15 green 2 A215 Vertical drill 6 down
24 OUTPUT15 OF.16 CN10 16 blue 2 A216 Horizontal drill 1 out

7I84U · TB3

Carries CN1, CN10.

Term Mesa signal From Way Colour Wire What
1 INPUT0 IF.17 CN1 1 brown 1 E117 Tool present in spindle (N.O.)
2 INPUT1 IF.18 CN1 2 red 1 E118 Manual tool-release button (N.O.)
3 INPUT2 IF.19 ⚠️ CN1 3 orange 1 — not used —
4 INPUT3 IF.20 CN1 4 yellow 1 E120 Tool-change piston up (N.O.)
5 INPUT4 IF.21 CN1 5 green 1 E121 Tool-change piston down (N.O.)
6 INPUT5 IF.22 CN1 6 blue 1 E122 X axis overtravel (N.O.)
7 INPUT6 IF.23 CN1 7 purple 1 E123 Y axis overtravel (N.O.)
8 INPUT7 IF.24 CN1 8 grey 1 E124 Z axis overtravel (N.O.)
9 INPUT8 IF.9 CN1 9 white 1 E109 Vacuum healthy (N.C.)
10 INPUT9 IF.10 CN1 10 black 1 E110 Router 5 off / up (N.O.)
11 INPUT10 IF.11 CN1 11 brown 2 E111 Saw unit retracted (N.O.)
12 INPUT11 IF.12 CN1 12 red 2 E112 Feed override, bit 1 (N.O.)
13 INPUT12 IF.13 CN1 13 orange 2 E113 Feed override, bit 2 (N.O.)
14 INPUT13 IF.14 CN1 14 yellow 2 E114 Feed override, bit 3 (N.O.)
15 INPUT14 IF.15 CN1 15 green 2 E115 Feed override, bit 4 (N.O.)
16 INPUT15 IF.16 CN1 16 blue 2 E116 Spindle contactor engaged (N.O.)
17 OUTPUT0 OF.17 CN10 1 brown 1 A217 Horizontal drill 2 out
18 OUTPUT1 OF.18 CN10 2 red 1 A218 Horizontal drill 3 out
19 OUTPUT2 OF.19 CN10 3 orange 1 A219 Counter-pressure
20 OUTPUT3 OF.20 CN10 4 yellow 1 A220 Saw blade down
21 OUTPUT4 OF.21 CN10 5 green 1 A221 Spindle inverter run
22 OUTPUT5 OF.22 CN10 6 blue 1 A222 Spindle reverse
23 OUTPUT6 OF.23 CN10 7 purple 1 A223 Router ram RETRACT
24 OUTPUT7 OF.24 CN10 8 grey 1 A224 Router ram PLUNGE

7I77U · TB3 and TB5 — the axis blocks

From the four D-sub connectors, not the ribbons.

Block Terms Mesa signals What From
TB3 1-8 QA0 / /QA0 / GND / QB0 / /QB0 / +5V / IDX0 / /IDX0 X encoder CONN.X pins 4,11,9,3,10,-,5,12
TB3 9-16 QA1 ... /IDX1 Y encoder CONN.Y pins 4,11,9,3,10,-,5,12
TB3 17-24 QA2 ... /IDX2 Z encoder CONN.Z pins 4,11,9,3,10,-,5,12
TB5 1-4 ENA0- / ENA0+ / GND / AOUT0 X enable and command CONN.X pin 13, and pins 8 / 15
TB5 5-8 ENA1- / ENA1+ / GND / AOUT1 Y enable and command CONN.Y pin 13, and pins 8 / 15
TB5 9-12 ENA2- / ENA2+ / GND / AOUT2 Z enable and command CONN.Z pin 13, and pins 8 / 15
TB5 15-16 GND / AOUT3 Spindle speed command CONN.S pins 15 / 8, via -R6

⚠️ TB3 supplies +5V and GND to each encoder, and defaults to differential — which is what the SGDH PG output is. Nothing to change.

✅ Landing IDX / /IDX costs two screws and enables HOME_USE_INDEX later.


Wire index

The same data sorted by wire number, for when you have a conductor in your hand and need to know where it goes.

Wire Address Ribbon · way · colour Lands on
A1 OF.41 CN13 1, brown 1 7I76EU TB5 term 17OUTPUT8
A2 OF.42 CN13 2, red 1 7I76EU TB5 term 18OUTPUT9
A201 OF.1 CN10 17, purple 2 7I76EU TB6 term 17OUTPUT0
A202 OF.2 CN10 18, grey 2 7I76EU TB6 term 18OUTPUT1
A203 OF.3 CN10 19, white 2 7I76EU TB6 term 19OUTPUT2
A206 OF.6 CN10 22, red 3 7I76EU TB6 term 22OUTPUT5
A207 OF.7 CN10 23, orange 3 7I76EU TB6 term 23OUTPUT6
A208 OF.8 CN10 24, yellow 3 7I76EU TB6 term 24OUTPUT7
A209 OF.9 CN10 9, white 1 7I84U TB2 term 17OUTPUT8
A210 OF.10 CN10 10, black 1 7I84U TB2 term 18OUTPUT9
A211 OF.11 CN10 11, brown 2 7I84U TB2 term 19OUTPUT10
A212 OF.12 CN10 12, red 2 7I84U TB2 term 20OUTPUT11
A213 OF.13 CN10 13, orange 2 7I84U TB2 term 21OUTPUT12
A214 OF.14 CN10 14, yellow 2 7I84U TB2 term 22OUTPUT13
A215 OF.15 CN10 15, green 2 7I84U TB2 term 23OUTPUT14
A216 OF.16 CN10 16, blue 2 7I84U TB2 term 24OUTPUT15
A217 OF.17 CN10 1, brown 1 7I84U TB3 term 17OUTPUT0
A218 OF.18 CN10 2, red 1 7I84U TB3 term 18OUTPUT1
A219 OF.19 CN10 3, orange 1 7I84U TB3 term 19OUTPUT2
A220 OF.20 CN10 4, yellow 1 7I84U TB3 term 20OUTPUT3
A221 OF.21 CN10 5, green 1 7I84U TB3 term 21OUTPUT4
A222 OF.22 CN10 6, blue 1 7I84U TB3 term 22OUTPUT5
A223 OF.23 CN10 7, purple 1 7I84U TB3 term 23OUTPUT6
A224 OF.24 CN10 8, grey 1 7I84U TB3 term 24OUTPUT7
A225 OF.25 CN13 17, purple 2 7I77U TB7 term 17OUTPUT8
A226 OF.26 CN13 18, grey 2 7I77U TB7 term 18OUTPUT9
A227 OF.27 CN13 19, white 2 7I77U TB7 term 19OUTPUT10
A228 OF.28 CN13 20, black 2 7I77U TB7 term 20OUTPUT11
A229 OF.29 CN13 21, brown 3 7I77U TB7 term 21OUTPUT12
A230 OF.30 CN13 22, red 3 7I77U TB7 term 22OUTPUT13
A235 OF.35 CN13 11, brown 2 7I77U TB8 term 19OUTPUT2
A236 OF.36 CN13 12, red 2 7I77U TB8 term 20OUTPUT3
A237 OF.37 CN13 13, orange 2 7I77U TB8 term 21OUTPUT4
A238 OF.38 CN13 14, yellow 2 7I77U TB8 term 22OUTPUT5
A240 OF.40 CN13 16, blue 2 7I77U TB8 term 24OUTPUT7
A248 OF.48 CN13 8, grey 1 7I76EU TB5 term 24OUTPUT15
A3 OF.43 CN13 3, orange 1 7I76EU TB5 term 19OUTPUT10
A4 OF.44 CN13 4, yellow 1 7I76EU TB5 term 20OUTPUT11
A5 OF.45 CN13 5, green 1 7I76EU TB5 term 21OUTPUT12
A6 OF.46 CN13 6, blue 1 7I76EU TB5 term 22OUTPUT13
A7 OF.47 CN13 7, purple 1 7I76EU TB5 term 23OUTPUT14
E101 IF.1 CN1 17, purple 2 7I84U TB2 term 1INPUT16
E102 IF.2 CN1 18, grey 2 7I84U TB2 term 2INPUT17
E103 IF.3 CN1 19, white 2 7I84U TB2 term 3INPUT18
E104 IF.4 CN1 20, black 2 7I84U TB2 term 4INPUT19
E107 IF.7 CN1 23, orange 3 7I84U TB2 term 7INPUT22
E108 IF.8 CN1 24, yellow 3 7I84U TB2 term 8INPUT23
E109 IF.9 CN1 9, white 1 7I84U TB3 term 9INPUT8
E110 IF.10 CN1 10, black 1 7I84U TB3 term 10INPUT9
E111 IF.11 CN1 11, brown 2 7I84U TB3 term 11INPUT10
E112 IF.12 CN1 12, red 2 7I84U TB3 term 12INPUT11
E113 IF.13 CN1 13, orange 2 7I84U TB3 term 13INPUT12
E114 IF.14 CN1 14, yellow 2 7I84U TB3 term 14INPUT13
E115 IF.15 CN1 15, green 2 7I84U TB3 term 15INPUT14
E116 IF.16 CN1 16, blue 2 7I84U TB3 term 16INPUT15
E117 IF.17 CN1 1, brown 1 7I84U TB3 term 1INPUT0
E118 IF.18 CN1 2, red 1 7I84U TB3 term 2INPUT1
E120 IF.20 CN1 4, yellow 1 7I84U TB3 term 4INPUT3
E121 IF.21 CN1 5, green 1 7I84U TB3 term 5INPUT4
E122 IF.22 CN1 6, blue 1 7I84U TB3 term 6INPUT5
E123 IF.23 CN1 7, purple 1 7I84U TB3 term 7INPUT6
E124 IF.24 CN1 8, grey 1 7I84U TB3 term 8INPUT7
E125 IF.25 CN4 17, purple 2 7I77U TB7 term 1INPUT16
E126 IF.26 CN4 18, grey 2 7I77U TB7 term 2INPUT17
E127 IF.27 CN4 19, white 2 7I77U TB7 term 3INPUT18
E128 IF.28 CN4 20, black 2 7I77U TB7 term 4INPUT19
E129 IF.29 CN4 21, brown 3 7I77U TB7 term 5INPUT20
E130 IF.30 CN4 22, red 3 7I77U TB7 term 6INPUT21
E131 IF.31 CN4 23, orange 3 7I77U TB7 term 7INPUT22
E132 IF.32 CN4 24, yellow 3 7I77U TB7 term 8INPUT23
E133 IF.33 CN4 9, white 1 7I77U TB8 term 9INPUT8
E134 IF.34 CN4 10, black 1 7I77U TB8 term 10INPUT9
E135 IF.35 CN4 11, brown 2 7I77U TB8 term 11INPUT10
E136 IF.36 CN4 12, red 2 7I77U TB8 term 12INPUT11
E137 IF.37 CN4 13, orange 2 7I77U TB8 term 13INPUT12
E138 IF.38 CN4 14, yellow 2 7I77U TB8 term 14INPUT13
E139 IF.39 CN4 15, green 2 7I77U TB8 term 15INPUT14
E140 IF.40 CN4 16, blue 2 7I77U TB8 term 16INPUT15
E143 IF.43 CN4 3, orange 1 7I77U TB8 term 3INPUT2
E144 IF.44 CN4 4, yellow 1 7I77U TB8 term 4INPUT3
E145 IF.45 CN4 5, green 1 7I77U TB8 term 5INPUT4
E146 IF.46 CN4 6, blue 1 7I77U TB8 term 6INPUT5