Connection Motor Phases and Holding Brake (CN10 and CN11)

General

The motor is designed for operation via a drive. Connecting the motor directly to AC voltage will damage the motor and can cause fires and initiate an explosion.

DANGER

POTENTIAL FOR EXPLOSION

Only connect the motor to a matching, approved drive in the way described in the present documentation.

Failure to follow these instructions will result in death or serious injury.

High voltages may be present at the motor connection. The motor itself generates voltage when the motor shaft is rotated. AC voltage can couple voltage to unused conductors in the motor cable.

DANGER

ELECTRIC SHOCK

oVerify that no voltage is present prior to performing any type of work on the drive system.

oBlock the motor shaft to prevent rotation prior to performing any type of work on the drive system.

oInsulate both ends of unused conductors of the motor cable.

oSupplement the motor cable grounding conductor with an additional protective ground conductor to the motor housing if the protective ground conductor of the motor cable is insufficient.

oOnly touch the motor shaft or the mounted output components if all power has been disconnected.

oVerify compliance with all local and national electrical code requirements as well as all other applicable regulations with respect to grounding of all equipment.

Failure to follow these instructions will result in death or serious injury.

If third-party motors are used, insufficient isolation may allow hazardous voltages to enter the PELV circuit.

DANGER

ELECTRIC SHOCK CAUSED BY INSUFFICIENT ISOLATION

oVerify protective separation between the temperature sensor and the motor phases.

oVerify that the signals at the encoder connection meet the PELV requirements.

oVerify protective separation between the brake voltage in the motor and the motor cable, and the motor phases.

Failure to follow these instructions will result in death or serious injury.

Drive systems may perform unintended movements if unapproved combinations of drive and motor are used. Though the connectors for motor connection and encoder connection may match mechanically, this does not imply that the motor is approved for use.

WARNING

UNINTENDED MOVEMENT

Only use approved combinations of drive and motor.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

See chapter Approved Motors for additional information.

Route the cables from the motor and the encoder to the device (starting from the motor). Due to the pre-assembled connectors, this direction is often faster and easier.

Cable Specifications

Shield:	Required, both ends grounded
Twisted Pair:	-
PELV:	The wires for the holding brake must be PELV-compliant.
Cable composition:	3 wires for motor phases 2 wires for holding brake The conductors must have a sufficiently large cross section so that the fuse at the mains connection can trip if required.
Maximum cable length:	Depends on the required limit values for conducted interference, see chapter Electromagnetic Emission.

Note the following information:

oYou may only connect the original motor cable (with two wires for the holding brake).

oThe wires for the holding brake must also be connected to the device at connection CN11 in the case of motors without holding brakes. At the motor end, connect the wires to the appropriate pins for the holding brake; the cable can then be used for motors with or without holding brake. If you do not connect the wires at the motor end, you must isolate each wire individually (inductive voltages).

oObserve the polarity of the holding brake voltage.

oThe voltage for the holding brake depends on the 24 Vdc control supply (PELV). Observe the tolerance for the 24 Vdc control supply and the specified voltage for the holding brake, see chapter 24 Vdc Control Supply.

oUse pre-assembled cables to reduce the risk of wiring errors, see chapter Accessories and Spare Parts.

The optional holding brake of a motor is connected to connection CN11. The integrated holding brake controller releases the holding brake when the power stage is enabled. When the power stage is disabled, the holding brake is re-applied.

Properties of the Connection Terminals CN10

The terminals are approved for stranded conductors and solid conductors. Use wire cable ends (ferrules), if possible.

Characteristic	Unit	Value
LXM32•U45, LXM32•U60, LXM32•U90, LXM32•D12, LXM32•D18, LXM32•D30	LXM32•D72
Connection cross section	mm² (AWG)	0.75 ... 5.3 (18 ... 10)	0.75 ... 10 (18 ... 8)
Tightening torque for terminal screws	Nm (lb.in)	0.68 (6.0)	1.81 (16.0)
Stripping length	mm (in)	6 ... 7 (0.24 ... 0.28)	8 ... 9 (0.31 ... 0.35)

Characteristic

Unit

Value

LXM32•U45, LXM32•U60, LXM32•U90, LXM32•D12, LXM32•D18, LXM32•D30

LXM32•D72

Connection cross section

mm²

(AWG)

0.75 ... 5.3

(18 ... 10)

0.75 ... 10

(18 ... 8)

Tightening torque for terminal screws

(lb.in)

0.68

(6.0)

1.81

(16.0)

Stripping length

(in)

6 ... 7

(0.24 ... 0.28)

8 ... 9

(0.31 ... 0.35)

Properties of the Connection Terminals CN11

The terminals are approved for stranded conductors and solid conductors. Use wire cable ends (ferrules), if possible.

Characteristic	Unit	Value
Maximum terminal current	A	1.7
Connection cross section	mm² (AWG)	0.75 ... 2.5 (18 ... 14)
Stripping length	mm (in)	12 ... 13 (0.47 ... 0.51)

Characteristic

Unit

Value

Maximum terminal current

1.7

Connection cross section

mm²

(AWG)

0.75 ... 2.5

(18 ... 14)

Stripping length

(in)

12 ... 13

(0.47 ... 0.51)

Assembling Cables

Note the dimensions specified when assembling cables.

Steps for assembling the motor cable

1 Strip the cable jacket, length A.

2 Slide the shielding braid back over the cable jacket.

3 Secure the shielding braid with a heat shrink tube. The shield must have at least length D. Verify that a large surface area of the shielding braid is connected to the EMC shield clamp. Shorten the wires for the holding brake to length B and the three wires for the motor phases to length C. The protective ground conductor has length A. Connect the wires for the holding brake to the device even in the case of motors without a holding brake (inductive voltage).

Characteristic	Unit	Value
A	mm (in)	140 (5.51)
B	mm (in)	135 (5.32)
C	mm (in)	130 (5.12)
D	mm (in)	50 (1.97)

Observe the maximum permissible connection cross section. Take into account the fact that wire cable ends (ferrules) increase the conductor cross section.

Monitoring

The device monitors the motor phases for:

oShort circuit between the motor phases

oShort circuit between the motor phases and ground

Short circuits between the motor phases and the DC bus, the braking resistor or the holding brake wires are not detected.

Wiring Diagram Motor and Holding Brake

Wiring diagram motor with holding brake

Connection	Meaning	Color
U	Motor phase	Black L1 (BK)
V	Motor phase	Black L2 (BK)
W	Motor phase	Black L3 (BK)
PE	Protective ground conductor	Green/yellow (GN/YE)
BR+	Holding brake +	White (WH) or black 5 (BK)
BR-	Holding brake -	Gray (GR) or black 6 (BK)

Connecting the Motor Cable

oConnect the motor phases and protective ground conductor to CN10. Verify that the connections U, V, W and PE (ground) match at the motor and the device.

oNote the tightening torque specified for the terminal screws.

oConnect the white wire or the black wire with the label 5 to connection BR+ of CN11.

Connect the gray wire or the black wire with the label 6 to connection BR- of CN11.

oVerify that the connector locks snap in properly.

oConnect the cable shield to the shield clamp (large surface area contact).

Shield clamp motor cable