Lenze MC Series dynamic braking User Manual

P2

P3

BC

HEATSINK

PL1

P3

A

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P3

1PL2

P

B

PL3

POWER BOARD

BRAKING / RELAY

CONTROL BOARD

BOARD

2.4 EXPLODED VIEW

Applies to kits: 842-006, 842-007
843-007, 843-008

1 5/8" SCREW (TYPICAL 2 PLCS.)

MC SERIES DYNAMIC BRAKING and ADDITIONAL FORM C RELAY OPTION

INSTALLATION INSTRUCTIONS (Manual Number: MDB01B)

Note

Dynamic Braking Board is shown for
illustration purposes. The Additional Form
C Relay Board is very similar and the
installation procedure is the same.

2 5/8" SCREW (TYPICAL 2 PLCS.)
SHOULDER WASHER

(TYPICAL 4 PLCS.)

2 X 6 PIN CONNECTOR

7.5 - 30 HP @ 240 Vac
10 - 60 HP @ 480 Vac

7.5 - 60 HP @ 590 Vac

SNAP-IN STANDOFF

(TYPICAL 2 PLCS.)

2.5 RESISTOR CONFIGURATIONS

When the Dynamic Braking Kit is ordered separately from the MC Series drive, the resistor assembly will be shipped in the 480 Vac and 590 Vac
configuration. For 240 Vac units, the resistor configuration must be modified, as shown below, using the hardware included with the kit.

841-007, 841-008, 841-009, 841-010

Connect each Tab #1 together with screw provided (copy the
configuration of the #2 tabs), and move the BLUE wire to Tab #2.

Note

If the Dynamic Braking option is ordered with the drive, the resistor assembly will be shipped in the proper configuration, and no
modification is required

480 Vac & 590 Vac 240 Vac

1 2

1 2

RED BLUE

1 2

1 2

RED BLUE

Lenze Americas • 630 Douglas Street • Uxbridge, MA 01569 • USA

Sales: [phone] • Service: [phone] • www.lenzeamericas.com

480 Vac & 590 Vac 240 Vac

841-011

1 2

1 2

1 2

1 2

RED BLUE

Connect each Tab #1 together with screw provided (copy the
configuration of the #2 tabs), and move the BLUE wire to Tab #2.

SCREW (TYPICAL 2 PLCS.)
CAPTIVE LOCK WASHER (TYPICAL 2 PLCS.)

SMALL FLAT WASHER (TYPICAL 2 PLCS.)

METAL STANDOFF (TYPICAL 2 PLCS.)
LOCK WASHER (TYPICAL 2 PLCS.)

LARGE FLAT WASHER (TYPICAL 2 PLCS.)

2 X 6 PIN CONNECTOR

1 7/8" STANDOFF (TYPICAL 4 PLCS.)

1 2

1 2

1 2

1 2

RED BLUE

13360127

MDB01B

1.0 INSTRUCTIONS FOR KITS: DYNAMIC BRAKING: 842-001, 842-002, 842-005
ADDITIONAL RELAY: 843-001, 843-006

1.1 PARTS LIST

(1) Dynamic Braking Board (9935-XXX or 9956-XXX) or Additional Form C Relay Board (9934-XXX or 9956-XXX)
(1) 7/16" Nylon sleeve standoff
(2) Nylon "snap-in" standoff (7.5 Hp kits only) (1) 3/4” Nylon sleeve standoff
(1) Resistor assembly (if ordered; DB kits only) (1) Nylon shoulder washer

0.5 - 5 HP @ 240 Vac
1 - 7.5 HP @ 480 Vac
1 - 5 HP @ 590 Vac

1.2 PROCEDURE

DANGER!

Hazard of electrical shock! Remove power from the drive and wait three minutes before attempting this procedure.
DC Bus capacitors retain charge after power is removed..

STOP!

The internal components of the MC Series drive can be damaged by electrostatic discharge (ESD)! Use an antistatic wrist strap with
the ground clip attached to the drive ground lug when attempting this procedure. Always place components on antistatic surfaces or in
antistatic bags when they are not being handled during this procedure.

Note

Refer to 1.4 Exploded View while performing this procedure. This view is from the right side of the drive. Be careful when removing and
installing boards, as there are many pins that can be easily bent.

1. With drive cover removed, remove the keypad assembly. On NEMA 1 units, this is done by prying one end of the bracket up and out. On NEMA 4 or 12 units,
remove the screws that hold the bracket in place. Then unplug the keypad ribbon cable from the Main Control Board (9933A-XXX or 9019-XXX).

2. Remove the Main Control Board by removing the four screws (one at each corner), and carefully lifting the board straight up and out.

Remove the 1-5/16” nylon sleeve standoff from the lower left-hand corner screw, and replace it with the 3/4” nylon sleeve standoff from the kit.
There is a 2 x 6 pin connector that connects the P3 plug on the Main Control Board to the P3 plug on the Power Board below. Leave this plugged into the P3 plug on

the Power Board.

3. Under the Main Control Board is the Driver Board (9926-XXX) which must be removed to install the DB Board or Relay Board. Remove the Driver Board by pinching
the flared top of each nylon standoff while gently lifting up on the board (leave the standoffs snapped into the Power Board underneath).

Note

On 7.5 Hp, 480 Vac drives only, remove and save the 2 x 6 pin connector that is plugged into PL2 on the Driver Board (another 2 x 6
connector may be included in the DB kit; only one is needed).

4. Slide the nylon shoulder washer through the 3/16” hole near the lower left-hand side of the DB Board or Relay Board, and slide the 7/16” nylon sleeve standoff onto
the shoulder washer from the bottom side of the board.

NOTE: On 9956-XXX boards (kits 842-005 and 843-006), install the two nylon "snap-in" standoffs into the holes near the DB1 and DB2 terminals.

5. Snap the DB Board or Relay Board into place where the old Driver Board was, onto the same nylon standoffs that held the Driver Board in place.

Make sure that the PL1 pin connector (and the P8 and P9 spade connectors on DB Boards) makes positive contact with their respective plugs.

For 9956-XXX board (kits 842-005 and 843-006): this board will also have a P11 connector on the bottom of the board.

Make sure that the P11 connector makes positive contact to the pins on the Power Board below. Install the 2 x 6 pin connector in PL2.

6. Re-install the Main Control Board. Make sure that the PL2 and P3 pin connectors make positive contact through the bottom of the Main Control Board.

7. Re-install the keypad assembly and drive cover.

1.3 WIRING AND PROGRAMMING

Refer to the appropriate diagram to the right for wiring.
To enable Dynamic Braking, set DYN BRAKE (parameter

14) to ON.

To enable the Additional Form C Relay, set TB-14 OUT
(parameter 52) to the desired status indication.

Refer to the drive's Installation and Operation Manual for
more info on programming.

For Kit 842-005: This Dynamic Braking board for 7.5 Hp, 480
Vac drives also contains the Additional Form C Relay option.

Lenze Americas • 630 Douglas Street • Uxbridge, MA 01569 • USA

Sales: [phone] • Service: [phone] • www.lenzeamericas.com

Dynamic Braking Board

DB1 DB2

RED

WIRE

From Resistor Assembly

BLUE
WIRE

Relay
Board

19 20 21

YELLOW WIRE

To TB-14 on Main

Control Board

MDB01B

13360127

1.4 EXPLODED VIEW

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P2

P3

P9 P8

ABCD

PL2

HEATSINK

POWER BOARD

BRAKING BOARD

MAIN CONTROL BOARD

PL1

P3

Applies to kits: 842-001, 842-002, 842-005
843-001, 843-006

Note

Dynamic Braking Board is shown for illustration
purposes. The Additional Form C Relay Board is very
similar and the installation procedure is the same.

0.5 - 5 HP @ 240 Vac

3/4" STANDOFF

1 - 7.5 HP @ 480 Vac
1 - 5 HP @ 590 Vac

1.5 RESISTOR CONFIGURATIONS

When the Dynamic Braking Kit is ordered separately from the MC Series drive, the resistor assembly will be shipped in the 480 Vac and 590 Vac
configuration. For 240 Vac units, the resistor configuration must be modified, as shown below, using the hardware included with the kit.

Note

If the Dynamic Braking option is ordered with the drive, the resistor assembly will be shipped in the proper configuration, and no
modification is required

480 Vac & 590 Vac

841-002, 841-003

1 2 3

RED BLUE

841-004, 841-005, 841-006

1 2 3

1 2 3

RED BLUE

Add jumper between Tab #1 and Tab #3, and move the RED wire to Tab #2.

SHOULDER WASHER

STANDOFFS ONLY

PRESENT IN 7.5 HP KIT

(9956-XXX DB BOARD)

1 2 3

1 2 3

1 2 3

7/16" STANDOFF

240 Vac

Jumper

RED BLUE

Jumper

RED BLUE

480 Vac 240 Vac

841-007

1 2

1 2

RED BLUE

Connect each Tab #1 together with screw provided (copy the
configuration of the #2 tabs), and move the BLUE wire to Tab #2.

SCREW (TYPICAL 4 PLCS.)

SHOULDER WASHER
(TYPICAL 4 PLCS.)

1 5/16" STANDOFF
(TYPICAL 3 PLCS.)

LOCATION OF P8 & P9 ON

7.5 HP DB BOARD (9956-XXX)

2 X 6 PIN CONNECTOR

1 2

1 2

RED BLUE

7.5 - 30 HP @ 240 Vac

2.0 INSTRUCTIONS FOR KITS: DYNAMIC BRAKING: 842-006, 842-007

ADDITIONAL RELAY: 843-007, 843-008

10 - 60 HP @ 480 Vac

7.5 - 60 HP @ 590 Vac

1.1 PARTS LIST

(1) Dynamic Braking Board (9955-XXX) (1) Resistor assembly (if ordered)
(2) Screw with captive lock washer (2) Metal "male-female" standoff
(2) Large flat washe ((2) Small flat washer
(2) Lockwasher (2) Nylon “snap-in” standoff

2.2 PROCEDURE

DANGER!

Hazard of electrical shock! Remove power from the drive and wait three minutes before attempting this procedure.
DC Bus capacitors retain charge after power is removed..

STOP!

The internal components of the MC Series drive can be damaged by electrostatic discharge (ESD)! Use an antistatic wrist strap with
the ground clip attached to the drive ground lug when attempting this procedure. Always place components on antistatic surfaces or in
antistatic bags when they are not being handled during this procedure.

Note

Refer to 2.4 Exploded View while performing this procedure. This view is from the right side of the drive.
Be careful when removing and installing boards, as there are many pins that can be easily bent.

1. With the drive cover removed, remove the keypad assembly. On NEMA 1 units, this is done by prying one end of the bracket up and out. On NEMA 4 or 12 units,
remove the screws that hold the bracket in place. Then unplug the keypad ribbon cable from the Main Control Board (9933A-XXX or 9019-XXX).

2. Remove the Main Control Board by unscrewing the four screws (one at each corner) and lifting the Main Control Board straight up and out.

There is a 2 x 6 pin connector that connects the P3 plug on the Main Control Board to the P3 plug on the Power Board below. Leave this plugged into the P3 plug on

the Power Board.

3. Under the Main Control Board is the Driver Board (9941-XXX) which must be removed to install the DB & Relay Board. Remove the Driver Board by pinching the
flared top of each nylon standoff while gently lifting up on the board (leave the standoffs snapped into the Power Board underneath).

Remove and save the 2 x 6 pin connector (see 2.4 Exploded View) that is plugged into PL2 on the Driver Board (another 2 x 6 pin connector may be included in the

DB & Relay kit; only one is needed).

Once the Driver Board is removed, examine the Power Board. There will be three screws in a row between the Bus Capacitors and the PL1 connector. Some units will also
have two standoffs labeled "P" and "B" located below the row of screws. If the Power Board has the "P" and "B" standoffs, go to Step 6. If not, continue with Step 4.

4. There are three screws in a horizontal row located between the Bus Caps and the PL1 connector on the Power board. Remove and discard the middle and right
screws (which are the middle and bottom screws as viewed in 2.4 Exploded View).

5. Install the two metal “male-female” standoffs where the screws were removed in Step 5, using the large flat washers and lockwashers.

6. Install the two nylon “snap-in” standoffs into the holes near the DB1 and DB2 terminals.

7. Snap the DB & Relay Board into place where the old Driver Board was, onto the same nylon standoffs that held the Driver Board in place.

Make sure that the PL1 and PL3 pin connectors make positive contact through the bottom of the DB & Relay Board.

8. Install the two screws with captive lockwashers at the top of the DB & Relay Board at the positions marked "P" and "B", using the small flat washers.

9. Install the 2 x 6 pin connector in PL2 on the DB & Relay Board.

10. Re-install the Main Control Board. Make sure that the PL2 and P3 pin connectors make positive contact through the bottom of the Main Control Board.

11. Re-install the keypad assembly and drive cover.

2.3 WIRING AND PROGRAMMING

Refer to the diagram to the right for wiring.
To enable Dynamic Braking, set DYN BRAKE (parameter 14) to ON.
To enable the Additional Form C Relay, set TB-14 OUT (parameter 52) to the

desired status indication.
Refer to the drive's Installation and Operation Manual for more info on

programming.

19

20 21

DB & Form C

Relay Board

DB1 DB2

RED

WIRE

From Resistor Assembly

BLUE
WIRE

YELLOW WIRE

To TB-14 on Main

Control Board

Lenze Americas • 630 Douglas Street • Uxbridge, MA 01569 • USA

Sales: [phone] • Service: [phone] • www.lenzeamericas.com

MDB01B

13360127

Lenze Americas • 630 Douglas Street • Uxbridge, MA 01569 • USA

Sales: [phone] • Service: [phone] • www.lenzeamericas.com

MDB01B

13360127