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RM7897A,C 7800 SERIES RELAY MODULES
Table 8. Blinking Fault Codes and Recommended Troubleshooting. (Continued)
Fault Code System Failure
Code 6-3
Fault with
*Device
special OEM
Specific*
input circuits.
Code 6-4
Unused at this
*Accessory
time.
Fault*
Code 7-7
Unused at this
*Unused*
time.
SAFETY AND SECURITY
Physical device protection
Device shall be accessible to authorized personnel only –
Installation on publicly accessible places is not
recommended as this could lead to unwanted and
potentially unsafe changes to device (wiring,
configuration, etc).
It is recommended to lock the device in an enclosed
cabinet with access allowed only to approved and trained
personnel. Also, it is strongly advised to keep all the wiring
of device physically secure.
Physical protection of the device is applied via Run/Test
switch label/seal. It is intended to prevent and detect
unauthorized access.
32-00158—03
1. Check wiring and operation of special OEM inputs.
2. Reset and sequence the relay module.
3. If fault reappears, remove power from the device, reapply power, then reset and sequence
the relay module.
4. If the fault does not repeat on the next cycle, check for electrical noise being copied into
the relay module through the external loads or possibly an electrical grounding issue.
5. If the fault persists, replace the relay module.
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18
Recommended Troubleshooting
Modbus & DDL Interface security
Any conducts critical to device functionality (DDL,
Modbus lines etc.) shall be physically protected (installed
outside public access) since they could be damaged or
tampered-with by unauthorized people, either
accidentally or for purpose.
Modbus RS-485 & DDL protocols do not support security
features. For DDL interface - only DDL devices shall be
connected to the Burner Controller DDL line.
License agreement
Copying and reverse engineering is prohibited by the law.
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