Murphy Swichgage EG21 - Manual (Page 4)

Warranty - A limited warranty on materials and workmanship is given with this FW Murphy product. A copy of the warranty
may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
Page 4 of 4.
CAUTION: Devices containing solid state components can be
damaged or caused to malfunction when used in systems which
incorporate inductive loads (e.g. relays, solenoids, etc.) that can
generate voltage spikes.
To reduce the potential for this type of damage, install a flyback or
clamping diode across all inductive loads (see wiring diagram
below).
Use Murphy diode package 65-00-0343 or equivalent. A typical
diode is 1N4005 which is readily available from commercial
sources. Failures of this type are not covered by our Limited
Warranty.