Power Supply Wiring
DC Power Supply
A dedicated 24 Vdc power supply is necessary to supply:
-
One or several LTMT main unit including the digital inputs of the LTMT main units.
-
The digital inputs of the LTMT expansion units.
An additional specific 24 Vdc power supply is necessary to supply:
-
The LTMT main unit digital outputs.
-
Other devices.
The LTMT main unit DC power supply must have the following characteristics:
-
AC/DC converter.
-
Galvanic isolation input AC/output DC: 4 kVac minimum at 50 Hz.
-
Input voltage: 100–240 Vac (+15%/-20%).
-
Output voltage: 24 Vdc (+/-10%).
The following Schneider Electric ABL8RPS24••• power supplies are recommended:
|
Reference number |
Input voltage |
Output voltage/current |
Maximum number of LTMT main units supplied |
|---|---|---|---|
|
ABL8RPS24100 |
100–500 Vac |
24 Vdc/10 A |
8 @updated D3
|
|
ABL8RPS24050 |
100–500 Vac |
24 Vdc/5 A |
4 @updated D3
|
|
ABL8RPS24030 |
100–500 Vac |
24 Vdc/3 A |
2 @updated D3
|
AC Power Supply
A dedicated AC power supply or UPS is necessary to supply:
-
One or several LTMT main unit.
-
The digital inputs of the LTMT expansion unit.
An additional specific AC power supply is necessary to supply:
-
The LTMT main unit digital outputs.
-
Other devices.
The LTMT main unit AC power supply or UPS must have the following characteristics:
-
Isolation transformer
-
Output voltage: 115 or 230 Vac (+15%/-20%)
-
115 Vac output voltage is recommended.
-
Power according to the number of LTMT main unit (several AC supplies are recommended).
-
UPS is recommended if voltage is unstable and does not follow standard EN 50160.
Power Supply Daisy Chaining
When the same AC power supply is used to supply several LTMT main unit, it is recommended to close the loop:
-
To avoid power off.
-
To minimize voltage drop due to long cables.