Power And Ground Connection; Figure 15: I/O Board Connections - Sentry SPD 5.5.5 Installation And Operation Manual

Sample Sequencer
Installation

Power and Ground Connection

An external wall-mount type of power supply is shipped with each Sample Sequencer. The power
supply provides unregulated 6VDC power to the instrument. The power supply comes standard as a
120 VAC device. Optional power supplies for other line voltages and outlet plug styles are available
from Sentry Equipment Corp.
It is recommended the power supply be plugged into an electrical outlet or outlet strip with surge
suppression and filtering such as an Isobar made by Tripp Lite. The power supply may also be
installed in an electrical junction box and wired with conduit to instrument-quality power, if desired.
Install according to local codes and procedures. Any cables connecting to the Sequencer which are
over 32 ft. (10 m) in length should also have surge protection devices installed.
The power supply black lead is positive (+6VDC) and the white striped lead is negative (-). Connect
the respective lead to the +6V and - terminals on the I/O board terminal block J1. Attach a 14 gauge
conductor from an earth ground point to the braided drain wire crimp connector labeled "EARTH
GND". See Figures 7 and 15. Warning: The drain wire from the display board mounting screw must
be grounded to protect your unit from electrostatic discharge effects.
FIGURE 15 - I/O Board Connections
SENTRY
Equipment Corp • P. O. Box 127 • Oconomowoc, WI 53066 • 262/567-7256 • FAX: 262/567-4523
Web: www.sentry-equip.com • e-mail: sales@sentry-equip.com
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