RM7890A,B,C/EC7890A,B 7800 SERIES RELAY MODULES
11
66-1089—11
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 (30 second PFEP).
JR1 removed.
b
30 seconds for RM7890A1031.
c
Not applicable for RM7890C (Standing Pilot).
d
The Relight feature (JR2 intact) requires a 0.8 second
FFRT Flame Amplifier. The EC/RM7890 locks out and indi-
cates a Fault 46 if a 3 second FFRT is used and jumper
JR2 is not clipped and removed.
e
Clipping and removing a site-configurable jumper after 200
hours of operation results in a hard lockout, code 110.
f
For RM7890A1064, RM7890B1055 and EC7890A1037
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.
SELECTABLE CONFIGURATION JUMPERS
1
2
1
2
JR2 REMOVED FROM RM7890C.
RM7890A1031 PFEP IS FIXED AT 30 SECONDS, IF JR1 IS
INTACT OR CLIPPED.
M11589A
Jumper
Number
Description
Intact
Clipped
e
JR1
a, f
Pilot Flame Establishing
Period (PFEP)
10 seconds
b
4 seconds
b
JR2
c
Flame Failure Action
Relight
d
Lockout
maxon.su