Chapter 6. Connector pinouts
This table combines the pinouts for all connectors on the borehole sensor and breakout box. Control signals are normally active low, but active high versions can be supplied on request.
Column (a): The single connector on a 40TB sensor, a 32-way mil-spec waterproof plug (02E-19-32P).
Column (b): The SENSOR connector on a breakout box, a 26-way mil-spec plug (02E-16-26P)
Column (c): The RECORDER and CONTROL 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 | H |
| F | Hole lock motor |
B | b |
| K | Hole lock motor return |
C | Z | Z |
| Inclinometer power |
D | c | c | B | + 12 to 24 V DC power |
E | b | b | A | 0 V power |
F | G | G |
| Mass position, vertical channel |
G | J | J |
| Mass position, N/S channel |
H | L | L |
| Mass position, E/W channel |
J | A | A |
| Velocity +ve, vertical channel |
K | B | B |
| Velocity –ve, vertical channel |
L | C | C |
| Velocity +ve, N/S channel |
M | D | D |
| Velocity –ve, N/S channel |
N | E | E |
| Velocity +ve, E/W channel |
P | F | F |
| Velocity –ve, E/W channel |
R | P | P |
| Calibration signal (all channels) |
S | R | R |
| Calibration enable (all channels) |
T | T | T |
| Y tilt |
U | S | S |
| X tilt |
W | K | K |
| BUSY LED |
V | U | U |
| 1 s response mode (Centre) |
X | V | V |
| Direct |
Z | W | W |
| (Unlock) |
Y | X | X |
| (Lock) |
b |
|
|
| Acc/Vel mode switch* |
e | N | N |
| Signal ground |
f | Y | Y | E | Control signal ground |
j |
|
|
| Case ground |
*The Acc/Vel 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 sensor returns to its operational mode once the centring process is completed.