L60 Channel Communications - GE L60 Instruction Manual

3.2 WIRING
As described earlier in this chapter, L60 communications channels reside on the special CT/VT module (type 8P). This
module allows for all possible 87PC scheme combinations (such as dual phase comparison or single-phase comparison, 2-
terminal or 3-terminal applications) in one module. The customer can upgrade or change the scheme at any time. The L60
channel interface requires an external battery to drive inputs and outputs. The module can be used with any battery volt-
age. However, the battery voltage must be reflected in the
SCHEME 87PC CH1(2) RX VOLT
communications outputs are MOSFETs and inputs are implemented with optocouplers, excluding any galvanic connection
between PLC connections and the relay boards.
3
L60 Comms 1
Single-phase
Comparison
L60 Comms 2
Dual-phase
Comparison
3-22
settings, which define the acceptable voltage threshold received from the PLC. The L60
L60
Tx Positive Ch 1
~
Tx1P 5c
BATT+ ~
5b
Tx1N ~
5a
Rx Positive Ch 1
Rx1P ~ 6c
BATT- ~ 6b
Rx1N
~ 6a
~ 7c
Tx2P
BATT+ 7b
~
Tx2N ~
7a
~
Rx2P 8c
~ 8b
BATT-
Rx2N ~ 8a
L60
Tx Positive Ch 1
~
Tx1P 5c
Common (+) Ch 1
BATT+
~
5b
Tx Negative Ch 1
Tx1N ~ 5a
Rx Positive Ch 1
Rx1P ~ 6c
Common (-) Ch 1
BATT- ~ 6b
Rx Negative Ch 1
Rx1N
~ 6a
~
Tx2P 7c
BATT+ ~ 7b
Tx2N ~
7a
~ 8c
Rx2P
~ 8b
BATT-
Rx2N
~ 8a
Figure 3–24: L60 TO PLC CONNECTIONS FOR A TWO-TERMINAL LINE
L60 Line Phase Comparison Relay

3.2.10 L60 CHANNEL COMMUNICATIONS

CONTROL ELEMENTS PHASE COMPARISON ELEMENTS
STATION
BATTERY
STATION
BATTERY
3 HARDWARE
87PC
PLC
PLC
831784A1.CDR
GE Multilin