RM7890A,B/EC7890A,B 7800 SERIES RELAY MODULES
11 32-00157-03
SETTINGS AND
ADJUSTMENTS
Selectable Site-Configurable
Jumpers
The RM/EC7890 has two site-configurable jumper
options, see Fig. 4 and Table 7. If necessary, clip the site-
configurable jumpers with side cutters and remove the
resistors from the relay module.
Fig. 4. Selectable site-configurable jumpers.
SERVICE NOTE
Clipping and removing a site-configurable jumper
enhances the level of safety. If using three-second
amplifier, site-configurable jumper JR2 must be clipped
and removed. If not removed, an F46 Lockout occurs.
Table 6. Site-Configurable Jumper Options.
a
Not Applicable for RM7890A1031/A2031 (30 second
PFEP). JR1 removed.
b
30 seconds for RM7890A1031/A2031.
c
The Relight feature (JR2 intact) requires a 0.8 second
FFRT Flame Amplifier. The EC/RM7890 locks out and
indicates a Fault 46 if a 3.0 second (2.0 second for
RM7890A1031/B2031, RM7890B1055/B2055 and
EC7890B1028/B2028) FFRT is used and jumper JR2 is
not clipped and removed.
d
Clipping and removing a site-configurable jumper after
200 hours of operation results in a hard lockout, code
110.
e
For RM7890A1064/B2064, RM7890B1055/B2055 and
EC7890B1028/B2028:
Intact—Fixed 10 seconds PFEP , Ignition (terminal 10)
shuts off at 6 seconds.
Clipped—Fixed 4 seconds PFEP, Ignition (terminal 10)
shuts off at 2 seconds.
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.
SELECTABLE CONFIGURATION JUMPERS
1 2
1
2
JR2 REMOVED FROM RM7890C.
RM7890A1031/A2031 PFEP IS FIXED AT 30 SECONDS, IF
JR1 IS INTACT OR CLIPPED.
M11589A
Jumper
Number Description Intact Clipped
d
JR1
a
Pilot Flame
Establishing Period
(PFEP)
10
seconds
b
4
seconds
b
JR2 Flame Failure Action
Relight
c
Lockout
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