5
ELECTROSTATIC DISCHARGE (ESD) HANDLING PROCEDURE
WIRING
Figure 6
Mother/Daughter Board Assembly
NC COM NO
(Relay #1)
(+) (–)
Loop
L1 L2/N GND
(+)
(–)
Power
Optional
Heater (HEAT)
Optional
Totalizer (TOT)
(+)
(_)
WA
ITIN
G F
OR
NE
W P
HO
TO
Magnetrol’s electronic instruments are manufactured to the
highest quality standards. These instruments utilize electron-
ic components which may be damaged by static electricity
present in most work environments. The following steps are
recommended to reduce the risk of component failure due to
electrostatic discharge:
1. Ship and store circuit boards in anti-static bags. If an
anti-static bag is not available, wrap board in aluminum
foil. Do not place boards on foam packing materials.
2. Use a grounding wrist strap when installing and remov-
ing circuit boards. A grounded workstation is also
recommended.
3. Handle printed circuit boards only by the edges. Do not
touch components or connector pins.
4. Ensure that all electrical connections are completely made
and none are partial or floating. Ground all equipment to a
good, earth ground.
RS-232
COM
(Relay #4)
NO
NC
NO
COM
(Relay #3)
NC
NC COM NO
(Relay #2)
(_)
PROBE #1 (TB 1)
(+)
(+)
(_) PROBE #2 (TB 2)
