Instruction Manual
Page: 6
Model 3100 Series Flame Detector (11/04)
ing” - remain energized until power is re-
moved, ”Fire Following” - de-energize a short
time after the fire is no longer detected. The
“J2” connector provides connections for both
normally open contacts and normally closed
contacts on the Fire Relay.
2.7.2 Fault Relay
The Fault Relay is a normally energized re-
lay. It will de-energize when a Fault occurs.
This means the detectors Fault Relay is in
the “Fault” state when the detector has no
power, and remains in the “Fault” state until
the detector is powered up and operating nor-
mally. The “J4” connector provides both
normally open contacts and normally closed
contact on the Fault Relay.
2.7.3 Verify Relay
The Verify Relay will energize when a “Veri-
fied Fire” is declared. Depending on the con-
figuration the relay will: “Latching” - remain
energized until power is removed, “Fire Fol-
lowing” - de-energize a short time after the
fire is no longer detected. Further, the “Verify
Control” configured to Level 0 will disable
the Verify Relay, and Level 7 causes the Verify
Relay to operate in parallel with the Fire Re-
lay. The connector labeled “Verify In” and
“Verify Out” provides connections for nor-
mally open contacts on the 3100-02 and 3100-
04 or normally closed contacts on the 3100-
03 and 3100-05. The configuration of Nor-
mally Open or Normally Closed contacts is
fixed and can only be changed by the fac-
tory.
2.7.4 Auxiliary Fault
The Aux. Relay is energized whenever the
detector fails the “Lens Check” test. This
fault indicates the detectors inability to “see”
a fire. Normally, cleaning the lens will clear
this fault. Because a dirty lens is the most
common type of fault, a separate indicator
connected to this relay will simplify mainte-
nance. The connector labeled “Aux In” and
“Aux Out” provides connections for Normally
Open contacts on the 3100-03 and 3100-04
models or Normally Closed contacts on the
3100-02 and 3100-05 models. The configu-
ration of Normally Open or Normally Closed
contacts is fixed and can only be changed by
the factory.
2.7.5 4-20 mA Operation
The 3100-06 uses a 4 to 20 mA current draw
circuit to indicate Fault, Fire, Verify Fire and
Normal Mode. The current draws are as fol-
lows:
Fault Mode:
0 mA
Normal Mode:
4 mA
Alarm Mode:
12 mA
Verify Mode:
20 mA
The 4-20 circuit is connected across the J2
connector at contact 6 and 7 where connec-
tion 6 is the negative side and connection 7 is
the positive side. Additionally, a jumper be-
tween contacts 7 and 8 must be made.
