Connection 24 Vdc Control Supply and STO (CN2, DC Supply and STO)
The +24VDC supply voltage is connected with many exposed signal connections in the drive system.
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ELECTRIC SHOCK CAUSED BY INCORRECT POWER SUPPLY UNIT |
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oUse a power supply unit that meets the PELV (Protective Extra Low Voltage) requirements. oConnect the negative output of the power supply unit to PE (ground). |
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Failure to follow these instructions will result in death or serious injury. |
The connection for the 24 Vdc control supply at the product does not have an inrush current limitation. If the voltage is applied by means of switching of contacts, damage to the contacts or contact welding may result.
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NOTICE |
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PERMANENT DAMAGE TO CONTACTS |
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oSwitch the power input of the power supply unit. oDo not switch the output voltage. |
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Failure to follow these instructions can result in equipment damage. |
Information on the signals of the safety function STO can be found in chapter Safety function STO ("Safe Torque Off"). If the safety function is not required, the inputs STO_A and STO_B must be connected to +24VDC.
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Shield: |
-(1) |
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Twisted Pair: |
- |
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PELV: |
Required |
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Minimum conductor cross section: |
0.75 mm2 (AWG 18) |
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Maximum cable length: |
100 m (328 ft) |
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(1) See chapter Safety function STO ("Safe Torque Off") |
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Properties of Connection Terminals CN2
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Characteristic |
Unit |
Value |
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Maximum terminal current |
A |
16(1) |
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Connection cross section |
mm2 (AWG) |
0.5 ... 2.5 (20 ... 14) |
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Stripping length |
mm (in) |
12 ... 13 (0.47 ... 0.51) |
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(1) Note the maximum permissible terminal current when connecting several devices. |
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The terminals are approved for stranded conductors and solid conductors. Use wire cable ends (ferrules), if possible.
Permissible Terminal Current of 24 Vdc Control Supply
oConnection CN2, pins 3 and 7 as well as pins 4 and 8 can be used as 24V/0V connections for additional consumers.
In the connector, the following pins are connected: pin 1 to pin 5, pin 2 to pin 6, pin 3 to pin 7 and pin 4 to pin 8.
oThe voltage at the holding brake output depends on the 24 Vdc control supply. Note that the current of the holding brake also flows via this terminal.
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Pin |
Signal |
Meaning |
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1, 5 |
STO_A |
Safety function STO: Dual-channel connection, connection A |
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2, 6 |
STO_B |
Safety function STO: Dual-channel connection, connection B |
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3, 7 |
+24 VDC |
24 Vdc control supply |
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4, 8 |
0VDC |
Reference potential for 24 Vdc control supply and reference potential for STO |
Connecting the Safety Function STO
oVerify that wiring, cables and connected interfaces meet the PELV requirements.
oConnect the safety function in accordance with the specifications in chapter Safety function STO ("Safe Torque Off").
Connecting the 24 Vdc Control Supply
oVerify that wiring, cables and connected interfaces meet the PELV requirements.
oRoute the 24 Vdc control supply from a power supply unit (PELV) to the device.
oGround the negative output at the power supply unit.
oNote the maximum permissible terminal current when connecting several devices.
oVerify that the connector locks snap in properly at the housing.
