Chapter 6. Connector pinouts
This table combines the pinouts for all connectors on the borehole sensor and surface control unit. Control signals are normally active low, but active high versions can be supplied on request.
Column (a): The single connector on the sensor, a 32-way mil-spec waterproof plug (02E-19-32P).
Column (b): The SENSOR connector on the breakout box, a 32-way mil-spec plug (02E-19-32P).
Column (c): The RECORDER and HCU connectors on the breakout box, both 26-way mil-spec plugs (02E-16-26P).
Column (d): The POWER connector on the breakout box, a 10-way mil-spec socket (02E-12-10S).
(a) | (b) | (c) | (d) | Function |
A | A |
|
| Hole lock motor |
B | B |
|
| Hole lock motor return |
C | C | Z |
| Inclinometer power |
D | D | c | B | + V power (12 to 24 V) |
E | E | b | A | 0 V power |
F | F | G |
| Mass position |
|
| K |
| BUSY LED |
J | J | A |
| Velocity +ve |
K | K | B |
| Velocity –ve |
R | R | P |
| Calibration signal |
S | S | R |
| Calibration enable |
|
| U |
| Centre |
|
| V |
| Direct |
|
| W |
| Unlock |
|
| X |
| Lock |
V | V |
|
| Centring motor (for offset zeroing) |
Y | Y |
|
| Lock motor |
b | b |
|
| Velocity / acceleration mode switch (see Note) |
e | e | N |
| Signal ground |
|
| Y |
| Control signal ground |
f | f |
|
| Motor return (centring and lock motors) |
| j |
|
| Case ground |
Note: The “velocity / acceleration mode switch” pin is used by the automatic centring process to switch the instrument temporarily into a mode where its response at normal frequencies is flat to acceleration, and thus in linear proportion to the mass position. The surface control unit returns the sensor to its operational mode once the centring process is completed.