Simplex 4020 Troubleshooting Manual page 20

General Issues,
Initialization problems due to
Improper matching of PCB
Versions
Older 4020 systems
Newer 4020 systems
Lightning Damage
Continued
Two Standard Slave PCB assembly versions exist. Although the assemblies
appear to be identical, each assembly requires specific Software, Power I/O
Interface assembly and Power Supply for proper operation.
: 636-289 4020 Intelligent Power Supply (Black Hawk)
WITH
: 565-222 Standard Slave assembly with U11 software (741-008)
REQUIRE
: 565-220 Power I/O Interface assembly
AND
: 636-341 Universal Switcher Power Supply (Gold Wing)
WITH
: 565-368 Standard Slave assembly with U11 software (741-033)
REQUIRE
: 565-256 Power I/O Interface assembly
AND
Some Standard Slave assemblies in the field may have an assembly software
version installed without the appropriate PCB assembly designation being
marked.
When a technician services the site, the incorrect assembly part number on the
board may mislead the technician into ordering the wrong Standard Slave
replacement assembly with incompatible software. The incorrect Standard Slave
assembly then complicates system troubleshooting and repair.
Although the wrong Standard Slave Assembly should not cause damage, the
system will not initialize properly because of the software incompatibility.
Field service personnel have reported that lightning accounts for significant
panel damage in certain geographical areas.
Proper lightning suppression equipment is essential for all outside field wiring
entering the building. It is recommended that these devices be located as close as
possible to the building entry point. In certain areas, transient protection is
recommended for both outside field wiring and incoming AC power to the
panel.
For detailed information concerning how to protect Simplex systems refer to the
Transient Suppression Methods for Simplex Equipment document (Pub No.
GEN-11-006).
636-370 w/charger adapter
3-3
OR