10
7. Connections
EAFR-102 Arc Fiber Loop Sensor Relay User Manual
MN026006EN February 2016 www.eaton.com
7. Connections
Figure 10. EAFR-102 Terminals at Rear Plate.
X2 X1
EAFR-102
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1I
B
2I
B
1
T
2T
3T
F
S
xu
a
U
+
+
+
+
15
14
13
12
BO1
BI2
RX
TX
QD
1
S
RX
TX
RX
TX
GND
2S
3S
SW1
T1 / T2
L
Config.
Select
L
CBFP Time
150
N L
L+C
L+C
L = Light
100
Latch
S2/S3 Channel
S1 Channel
C = Current
N L = Non Latch
7.1 Outputs
7.1.1 Trip Relays T1 and T2
The EAFR-102 unit has integrated trip relays T1 and T2 for
tripping of the circuit breakers. T1 and T2 relays are nor-
mally open type (NO).
7.1.2 Trip Relays T3 and T4
The T3 relay output will act as an electronic lockout relay.
The T3 electronic lockout relay is a normally closed type
(NC) and will hold its position until a manual reset command
or until the auxiliary power supply is lost. When re-applying
the auxiliary power supply, the electronic lockout relay will
return to its contact condition prior to loosing the auxiliary
power. This NC relay output can be used for tripping con-
tactor controlled devices.
The T3 relay follows the operation of T1 and activates when-
ever T1 is activated.
Trip relay T4 is a common trip relay that operates anytime
the T1 or T2 relay operates and can be used either for trip-
ping one more disconnecting device or for a trip alarm to
local or remote monitoring and alarm system. T4 is a nor-
mally open type (NO) relay.
7.1.3 Binary Output BO1
One binary output is available (+24 Vdc). The binary out-
put function can be configured using the dipswitches (see
Section 3.5: Dipswitch Settings).
otee:
N
The binary output is polarity sensitive (see Section 8:
Wiring Diagram).
7.1.4 System Failure Relay SF
The system failure (SF) relay is a form C type (NO/NC) and
is energized in the healthy condition. Whenever the EAFR-
102 detects a system error, or disconnection of the auxiliary
power supply, the contact changes its state. The state of
the SF relay remains the same until the unit returns to a
healthy condition and the SF relay is again energized.
7.2 Inputs
7.2.1 Arc Fiber Optic Loop Sensor Channels S1, S2,
and S3
The EAFR-102 has three fiber optic loop sensor channels
each with a transceiver (Tx) and receiver (Rx). When the
fiber optic loop sensor is connected to the unit, one end
is connected to Tx and another to Rx. This sensor loop is
then continuously monitored by means of the test light
pulse traveling through the loop. In case of discontinuity
in the loop, the unit goes into error mode and activates the
ERROR LED and SF relay output.