Sentry Sample Sequencer 6 - Page 16

16 Sentry Equipment Corp
Table 1. Power Cord Requirements
Location Cord Plug
United States ANSI/UL 817 ANSI/UL 498
Canada CSA C22.2 No. 21 or C22.2 No. 49 CSA C22.2 No. 21 and C22.2 No. 42
European Community IEC 60227 or 60245 Appropriate IEC standard
If desired, the Sample Sequencer 6 may also be hard wired to instrument-quality power using appropriate certied
ttings, and wiring.
 A suitable external over-current protection device, such as a fuse (Class CC, 2A, Time delay) or circuit breaker (C trip
curve, 2 A), and disconnect device is recommended.
 The over-current protection and disconnect devices shall be installed on both the hot (L) and neutral (N) leads.
 The disconnect device shall be located near the equipment and marked with appropriate ON(|) OFF(O) markings as
specied by local codes.
 For xed wiring methods, the ground conductor shall have insulation with a continuous outer nish that is either
green, or green with one or more yellow stripes.
 During connection of the power wire, the grounding lead must be suitably routed and long enough so that it is the
last conductor to take the strain.
 Installation should be performed by qualied personal in accordance with local codes and procedures.
Grounding and EMC Considerations
Power
To properly ground the Sample Sequencer 6:
• Use an insulated ground conductor that has a green or green with one or more yellow stripes and is the same size
as the mains conductor, and land the conductor on the “EGND” terminal on the power board.
I/O Cables
To maintain SGS and CE ratings for EMC:
 All I/O cables must be shielded and grounded.
 The shield (drain) wire for the analyzer inputs must be tied to an isolated ground located near the opposite cable
end (analyzer) from the sequencer, and not connected to the sequencer.
Sequencer Board Connections
Make sure all leads are lugged prior to wiring to the terminal blocks. This avoids the potential for miswiring and placing
transients on the analyzer(s) and sequencer. Be sure to ground the shield in the analyzer as detailed in “Grounding and EMC
Considerations” on page 16.