RM7895A RELAY MODULE
23
32-00122-01
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.
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.
PURGE HOLD (Airflow Interlock)
The LED indicates the burner status, POWER, and that the Airflow Interlock is
not closed. The sequence will not advance to ignition until the Airflow
Interlock proves closed. If this time exceeds a 30 second HOLD, the RM7895
will lockout.
PILOT IGN
The LEDs indicate the burner status, POWER, PILOT and FLAME, which is the
period of time the RM7895 permits the pilot valve to be open and the pilot
flame to be established.
RUN
The LEDs indicate the burner status, POWER, PILOT, FLAME and MAIN,
which is the period of time after the Ignition Trials and before the operating
controller set point is reached. During this time, the burner is firing under the
control of the operating controller (RM7895A).
RESET/ALARM TEST
The LED indicates the burner status, POWER and ALARM. This condition
indicates that the reset push button is pressed. If it is held for more than four
seconds, the alarm output is energized. The alarm output will be de-
energized after the reset push button is released.
Table 9. Sequence and Status Hold Information.
Sequence
Status
