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WIRING OVERVIEW
Electrical connections are made via pluggable terminal blocks located inside
the meter. All conductors should conform to the meter's voltage and current
ratings. All cabling should conform to appropriate standards of good installation,
local codes and regulations. It is recommended that the power supplied to the
meter (DC or AC) be protected by a fuse or circuit breaker. When wiring the
TBA
TBC
Front
meter, compare the numbers on the label on the back of the meter case against
those shown in wiring drawings for proper wire position. Strip the wire, leaving
approximately 0.4" (10 mm) bare lead exposed (stranded wires should be tinned
with solder.) Insert the lead under the correct screw clamp terminal and tighten
TBC
TBD
until the wire is secure. (Pull wire to verify tightness.) Each terminal can accept
up to one #14 AWG (2.55 mm) wire, two #18 AWG (1.02 mm), or four #20
AWG (0.61 mm). Use copper conductors only, with insulation rated at 90°C.
WIRING CONNECTIONS
Internal removable terminal blocks are used for power and signal wiring.
Access to terminal blocks is through conduit fittings. Remove end plates with
?" nut driver. For LD4 versions, all wiring is on right side of unit. For LD2
Front
1
8
TBB
LD2 Left Side
versions, power and input wiring connections are on the right side and the relay
and serial options are on the left side.
Connect the drain wire from the shielded cable(s) to the screw on the side
plate for proper grounding.
LD4
TBD
Front
1
8
TBA
TBB
Only programmable models
have terminals TBC and TBD.
LD2 Right Side
3.1 POWER WIRING
The power wiring is made via the 3 position terminal block (TBA) located
inside the unit (right side). The DC out power is located on TBB (right side).
Power
Terminal 1: VAC/DC +
Terminal 2: VAC/DC -
Terminal 3: Protective Conductor
Terminal
+
-
1 L1
2 L2
3
TBA
DC Out Power
Terminal 4: + 24 VDC OUT
Terminal 6: User Common
4 + EXC
6 COMM
TBB
3.2 RESET/USER INPUT WIRING
The Reset/User Input is located on the right side.
Sinking Logic
Sourcing Logic
Terminal 5: Reset/User
Terminal 6: Comm
5 RESET/USER
TBB
5 RESET/USER
TBB
6 COMM
DIP switch 6 OFF
3.3 SETPOINT (OUTPUT) WIRING
The setpoint relays use a six position terminal block (TBC) located inside the
unit: LD4 (right side) and LD2 (left side).
6 COMM
DIP switch 6 ON
Terminal 1: NC 1
Terminal 2: NO 1
Terminal 3: Relay 1 Common
1 N.C. 1
2 N.O. 1
Terminal 4: NC 2
Terminal 5: NO 2
Terminal 6: Relay 2 Common
3 COMM 1
4 N.C. 2
TBC
5 N.O. 2
6 COMM 2
4
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