Mdu Terminal Block Section - Mitsubishi Electric MDU-BN Instruction Manual

5.2 MDU terminal block section

(1) Control power supply terminals: L1 and L2
Connect to the MDU control power supply. They have no polarity.
(2) Ground terminal: FG (on mounting plate)
MDU external mounting: FG terminal on mounting plate of MDU Breaker main unit
MDU panel mounting: FG terminal on MDU mounting bracket
Connect above terminals to class D ground.
(3) Ground terminal: FG (on terminal block)
Connect the FG terminal on the terminal block with the FG terminal in (2) above, and then ground (class D).
(4) Pulse output terminals: 114 and 113 (with electric energy pulse output option)
These are electric energy pulse output terminals. They have no polarity.
(5) CC-Link communication terminals: DA, DB, DG, and SLD (with CC-Link communication option)
Connect to CC-Link communication signals DA, DB, DG, and SLD.
(6) MODBUS communication terminals: FG, SLD, 485+, 485-, and Ter (with MODBUS communication option)
Connect to MODBUS communication signals FG, SLD, 485+, and 485-.
If the 485- and Ter terminal are short-circuited, the end MDU of the MODBUS communication can be terminated using the 120 Ω terminal resistor.
Terminal layout figure:
External mounting specification
L1 L2 Unused FG
MDU control
power supply
No transmission Unused Unused Unused Unused
Pulse output Unused Unused
CC-Link
MODBUS
● Do not connect anything to unused terminals.
● Do not use with connecting wiring.
Erroneous connection will cause failure.
[1] [2] [3] [4]
[1] [2] [3] [4]
113 114
SLD DG DB DA
SLD 485+ 485- Ter
Caution
Terminal layout figure:
Panel mounting specification
[1] [2] [3] [4]
No transmission
Pulse output
Screw size on terminal block is M3.5. Tightening torque is 0.94 to 1.51 N ･ m.
Use crimped terminal size 7.5 mm or less for M3.5 screw.
[1] [2] [3] [4] [5] [6] [7] [8]
[1] [2]
CC-Link DA DB
MODBUS Ter 485-
Screw size on terminal block is M3. Tightening torque is 0.49 to 0.76 N ･ m.
Use crimped terminal size 6.3 mm or less for M3 screw.
28
MDU control power supply
L2 L1
[1] [2] [3]
Unused Unused Unused Unused
114 113 Unused Unused
MDU control power supply
L2 L1
[3] [4] [5] [6]
DG SLD DA DB
485+ SLD Ter 485-
FG terminal
[4]
FG terminal
[7] [8]
DG SLD
485+ SLD