Connector pin-outs
Note:
Pins V, W, X and Y are only used when the remote centring option is
fitted. Pin Y serves as the return for motor currents. Without the remote
centring option, grounding Pin U puts the instrument into one-second
mode. With the remote centring option, grounding pin U for seven
seconds initiates automatic centring.
These connectors are plug-compatible with the Güralp 3ESP, so you can use Güralp
3ESP hand-held control units and breakout boxes to monitor the low-gain velocity
outputs and run calibrations. Pressing
ENABLE
and
CENTRE
on a Güralp 3ESP hand-
held control unit activates pin U and switches the 40T into one-second mode for as
long as the buttons are held down. You must do this before you can monitor mass
position outputs,
e.g.
for offset zeroing.
Note:
40T units with the optional additional high-gain outputs cannot be
used with a Güralp 3ESP breakout box. The pin-outs for these sensors are
given in the next section.
Pin R,
Calibration enable
, is equivalent to the vertical calibration enable line on a
Güralp 3ESP, so you can calibrate all channels by setting up Scream! or a hand-held
control unit to calibrate the vertical channel.
35
Issue F - June 2019
