AMETEK SORENSEN DLM 40-15 (01) PDF Document

The safety symbols on the AMETEK SORENSEN DLM 40-15 are as follows:

When you first receive your AMETEK SORENSEN DLM 40-15, perform the following inspections to ensure no shipping damage has occurred:

1. Visually inspect the shipping container before accepting the package from the carrier. If damage is evident, note it on the carrier’s receipt and have the driver sign it.

2. After removing the unit from the container, visually inspect it for shipping damage like dents, scratches, enclosure distortion, or damaged controls. External damage may indicate internal damage as well.

3. If you find damage, immediately contact the carrier to file a claim for concealed damage. Save the shipping container and all filler material for inspection.

The AMETEK SORENSEN DLM 40-15 is designed for both rackmount and benchtop use. Since the unit is fan-cooled, you must ensure adequate clearance for air flow.

Air Intake: Located at the front and front sides of the unit.

Air Exhaust: Located at the rear panel and rear sides of the unit.

Ensure that the air intake and exhaust are not impeded. The ambient air temperature at the intake should not exceed 50°C.

To install a single AMETEK SORENSEN DLM 40-15 into a rack using the DLMRK Rack Mount Kit, follow these steps:

1. Remove the four (4) rubber feet and their mounting hardware from the bottom of the unit and discard them.

2. Remove the four (4) truss head screws (two on each side) from the front side panels of the unit. Do not discard these screws.

3. Decide if you will mount the unit on the right or left side of the rack.

4. Install a Rack Mount Extruded Ear on the front side of the unit using two (2) of the existing truss head screws you removed in step 2.

5. Install the Single-Unit Rack Mount Bracket on the opposite side from the Extruded Ear using two (2) panhead SEMS screws (6-32UNC-2A x .25″) supplied in the kit.

6. Install the other Rack Mount Extruded Ear on the end of the Single-Unit Rack Mount Bracket using the remaining two (2) existing truss head screws.

7. Position one of the two Chassis Rack Mount Brackets on the chassis side of the rack. If needed, use one of the two (2) Right Angle Adapter Brackets to match existing vertical rack rail positions.

CAUTION: To prevent internal damage, use only the specified screw lengths. The unit will not be stable on the Chassis Rack Mount Bracket until at least one of the four (4) front panel mounting screws is installed.

To install two AMETEK SORENSEN DLM 40-15 units side-by-side in a rack using the DLMRK Rack Mount Kit, follow these steps:

1. On both units, remove the four (4) rubber feet and their mounting hardware from the bottom and discard them.

2. On both units, remove the four (4) truss head screws (two on each side) from the front side panels. Do not discard these screws.

3. Install the Tie Bar onto the bottom of the two (2) inner heat sinks using the six (6) Philips flat head screws (6-32UNC-2A X .31″) supplied in the kit.

4. Install the Rack Mount Extruded Ears on the front outer sides of both units using the existing four (4) truss head screws you removed in step 2.

5. Position the two Chassis Rack Mount Brackets in the rack. If needed, use the two (2) Right Angle Adapter Brackets to match existing vertical rack rail positions.

CAUTION: To prevent internal damage, use only the specified screw lengths.

The AMETEK SORENSEN DLM 40-15 operates from an AC power source with the following specifications:

AC Input Voltage Range: 90–132 VAC or 180–264 VAC. The range is automatically selected by the unit at power-up; no user setup is required.

AC Input Frequency Range: 47–63 Hz.

AC Input Current: 11A maximum at 115 VAC; 6A maximum at 230 VAC.

The unit uses an IEC connector on the rear panel for the AC power cord, which also provides the safety ground termination. The supplied power cord includes a safety ground wire that connects the unit’s enclosure to the AC power source’s safety ground.

To connect a load to your AMETEK SORENSEN DLM 40-15, follow these guidelines:

1. Before making any connections, disconnect the AC power cord to prevent electrical shock.

2. For low-voltage models (5V–60V), connect the load to the bus bars at the rear of the unit. The bus bars are protected with a two-piece cover. The top portion is removable for access to the screws.

3. For high-voltage models (80V–300V), connect the load to the output terminal block, which has a snap-on cover.

4. Ensure that the cover is properly installed before applying AC power to the unit.

5. When selecting wire gauge, consider the wire’s current carrying capacity, the voltage drop across the total length of the load lines, and potential noise coupling and impedance effects.

Load wiring must have a current carrying capacity greater than the output current rating of the power supply. This ensures the wiring won’t be damaged if the load is shorted.

The following table shows the current rating for various gauges of wire, based on 500A/cm².

For applications where regulation is important, select a wire gauge that maintains an acceptable total voltage drop. You can calculate the voltage drop (V) per lead using the formula: V = I x L x R20°C × [1 + 0.004 × (T-20°C)], where I is load current, L is length in meters, R20°C is resistance at 20°C, and T is the wire temperature.

Remote sensing compensates for voltage drop across the load wires. To set it up on the AMETEK SORENSEN DLM 40-15:

1. Locate the eight-section SETUP switch on the rear panel.

2. Set the REM SNS switch (Position-1) to the ON (up) position.

3. Connect a separate pair of wires from the REMOTE SENSE (REM SNS) connector on the rear panel to the load terminals. The sense leads should be a twisted-pair of at least AWG #22 wire.

REM SNS Connector Pinout:

Pin 1: Negative (-) Sense

Pin 2: Positive (+) Sense

Important Notes:

If the unit is set for remote sense but the sense wires are not connected, the unit will revert to local sense, and the output voltage at the rear panel terminals will increase by about 5% above the programmed value.

If remote sensing is enabled but the sense leads are not connected to the output, the power supply will shut down due to OVP.

To use local sensing (the factory default), ensure the REM SNS switch (Position-1) is set to OFF (down).

To connect up to four AMETEK SORENSEN DLM 40-15 units of the same model in a master/slave parallel configuration, follow these steps:

1. Connect the outputs of all units in parallel at their rear panel terminals using short cable lengths. Connect the load wires to the output terminals of the master unit.

2. Interconnect the master and slave units using the PARALLELING CABLE (Sorensen part number DLMP1) connected to the PARALLEL I/O connectors on the rear panels.

3. For each slave unit, set the SLAVE switch (Position-2) on the rear panel SETUP switch to the ON (up) position.

4. For the master unit, ensure the SLAVE switch (Position-2) is set to OFF (down).

5. On each slave unit, adjust its OVP setting to full scale.

6. The voltage, current, and OVP for the entire parallel array are now adjusted using the controls of the master unit. The voltage displays of the slave units will be blanked out. The total load current is the sum of the current displays of all units.

Note: The OUTPUT switch on the master unit will turn all units off. Turning off the POWER switch on any unit will shut down all units.

You can connect multiple AMETEK SORENSEN DLM 40-15 units of the same model in series to obtain a higher output voltage. The setup is as follows:

1. Interconnect the supplies by connecting the negative terminal of one supply to the positive terminal of the next supply in the string.

2. The total output voltage is taken from the positive terminal of the first unit and the negative terminal of the last unit in the string.

3. Each supply is adjusted individually. The total output voltage is the sum of the individual outputs.

4. The output current is the same for each unit in the series string.

5. Both local and remote sensing can be used for each unit individually.

CAUTION: Do not connect the remote sense leads of one supply across the total series string, as this can cause damage. The maximum float potential of any output terminal to chassis ground must not exceed 300V(PK).

1. Ensure the POWER and OUTPUT switches are in the OFF position (buttons out).

2. Ensure no connections are made to the REMOTE ANALOG INTERFACE connector and all positions of the rear SETUP switch are OFF (down).

3. Turn the VOLTAGE and CURRENT controls fully counter-clockwise.

4. Turn the OVP control fully clockwise.

5. Connect the power cord to an appropriate AC power source.

6. Turn the front panel POWER switch to the ON position (button in). The supply will run a power-up routine for about 7 seconds: all LEDs will light up, all display segments will be on, and internal fans will run at maximum speed.

7. After power-up, verify that both digital displays are on and indicate zero. The OVP, FAULT, EXT-OFF, REM, and OUTPUT LEDs should be off.

8. Turn the POWER switch ON.

9. Turn the CURRENT control fully clockwise.

10. Ensure the VOLTAGE indicator is on and the CURRENT indicator is off.

To set the AMETEK SORENSEN DLM 40-15 for constant-voltage mode:

1. Turn the front panel POWER switch ON and the OUTPUT switch OFF.

2. Press the V/I PREVIEW switch to display the programmed settings for voltage and current.

3. Adjust the controls to set the desired output voltage and an output current limit that is greater than the maximum peak current your load will require.

4. Turn the front panel OUTPUT switch to the ON position. The VOLTAGE indicator should be ON, and the CURRENT indicator should be OFF.

The power supply will now maintain a regulated output voltage at your set point, as long as the load current remains below the current limit setting.

To set the AMETEK SORENSEN DLM 40-15 for constant-current mode:

1. Turn the front panel POWER switch ON and the OUTPUT switch OFF.

2. Press the V/I PREVIEW switch to display the programmed settings for voltage and current.

3. Adjust the controls to set the desired output current and an output voltage limit that is greater than the maximum compliance voltage your load will require.

4. Turn the front panel OUTPUT switch to the ON position. The CURRENT indicator should be ON, and the VOLTAGE indicator should be OFF.

The power supply will now maintain a regulated output current at your set point, as long as the load voltage remains below the voltage limit setting.

To set the OVP threshold on your AMETEK SORENSEN DLM 40-15:

1. Turn the POWER switch ON and the OUTPUT switch OFF.

2. Press the V/I PREVIEW switch and set the desired output voltage and current for your application.

3. Press the OVP PREVIEW switch. The VOLTAGE display will show the current OVP threshold setting.

4. Adjust the OVP SET control to the desired threshold. Ensure the OVP setting is higher than the intended output voltage setting; otherwise, the OVP will trip immediately when the output is turned on.

If the OVP monitor has been activated (tripped), perform the following steps to reset it:

1. Reduce the power supply’s output voltage setting to below the OVP threshold.

2. Ensure that the connections for the power and sense leads are correct.

3. Reset the OVP monitor by toggling one of the following OFF and then back ON:

– The front panel OUTPUT switch

– The front panel POWER switch

– The EXTERNAL-OFF signal of the REMOTE ANALOG INTERFACE

When using the AMETEK SORENSEN DLM 40-15 to charge a battery, take the following precautions:

1. Connect an isolation diode in series with one of the output terminals. This prevents the battery from discharging back into the power supply if the supply is turned off. The diode must have suitable current and voltage ratings and should be mounted on an appropriate heat sink.

2. Adjust the VOLTAGE setting to the desired float voltage. You can do this using the V/I PREVIEW switch or with the supply disconnected from the battery. If using local sensing, compensate for the voltage drop across the isolation diode.

3. Adjust the CURRENT setting to the desired current limit value for charging.

The supply will initially operate in constant-current mode. As the battery charges and its voltage rises to the float voltage setting, the supply will automatically cross over to constant-voltage mode, and the battery current will taper off as it becomes fully charged.

The 8-position SETUP switch on the rear panel of the AMETEK SORENSEN DLM 40-15 configures various operational settings. The factory default is all switches OFF (down).

Refer to the following table for troubleshooting common problems with the AMETEK SORENSEN DLM 40-15:

Because the unit uses forced convection cooling, dust can accumulate inside. In dusty environments, periodic cleaning may be required.

To clean the exterior of the unit, use a mild solution of detergent and water. Apply the solution with a soft cloth; do not apply it directly to the unit’s surface. To prevent damage to materials, do not use aromatic hydrocarbons or chlorinated solvents for cleaning.