DES 310/311 Power Supply

The DES 310 and DES 311 power supplies are suited to the entire range of Magtrol's Eddy-Current and Powder Brake Dynamometers. To avoid any disruption of the surrounding electronic modules, the DES 310 / DES 311 supplies are fitted in an industrial housing made of extruded cast aluminum. This housing must be installed directly on the test bench, as near to the dynamometer as possible.

The DES 310 / DES 311 supplies can be controlled by analog and digital set-points coming from an electronic peripheral, ideally from Magtrol's DSP7000 Dynamometer Controller or DSP6001 Dynamometer Controller.

Control

The Power supplies can be switched on by remote control. A stand-by command allows the dynamometer power to be activated. The excitation current is controlled by a set-point in the range of 0 to 10 VDC. The nominal value of the excitation current is adjustable by internal resistors or remotely. There are two digital outputs (alarms): one is an electrical fault indicator and the other detects overheating in the DES unit or the cooling water. If one of the alarms is activated, a general alarm is signalled by means of relay contacts. For applications with tandem dynamometers, the DES 310/ DES 311 units also control the power supply of the electromagnetic clutch.

Supply Voltage

The supply voltage of the DES 310/DES 311 can be selected to allow operation at either 230 VAC or 115 VAC (50/60 Hz). The DES 310 power supply includes a galvanic separation between the supply circuit and the dynamometer power. Because of the power required, the supply to the DES 311 unit is made directly without galvanic separation.

Features

For use with Magtrol WB Eddy-Current and PB Powder Brake Dynamometers
Controlled current supply, with over voltage factor > 5
Analog input for current set-point

Selection of nominal current
Control by digital inputs/outputs
General alarm provided by relay
2 alarm outputs (temperature, electrical circuit)
Available in either 115 or 230 VAC

Ordering Information

DES 310	for WB & PB Dynamometers series 2.7 and 43 (max. 3A)
DES 311	for WB & PB Dynamometer series 65, 115 and 15 (max. 12A)

Technical Specifications

	DES 310	DES 311
NETWORK SUPPLY
Voltage	115 VAC / 230 VAC ±10 %
Frequency	50 Hz / 60 Hz
Fuse	T1A or T2A depending on the brake(s) 115–230 VAC	T2A to T12.5A depending on the brake(s) 230 VAC 115 VAC
Maximum current	1 A + clutch	3 A + clutch / 230 VAC 6 A + clutch / 115 VAC
ELECTROMAGNETIC CLUTCH SUPPLY
Voltage	115 VAC / 230 VAC
Current	1 A
SUPPLY FOR EXTERNAL USE
Voltage	+24 VDC ±10 %
Maximum Current	300 mA
SELECTION OF NOMINAL CURRENT
(Selected by resistors)	0.5 A; 1.0 A; 1.5 A; 2.0 A; 2.5 A; 3.0 A	2.5 A; 4.0 A; 5.0 A; 7.5 A; 10.0 A; 12.0 A
EXCITATION SET-POINT
Voltage	0 to 10 VDC
Impedance	> 10 kOhm
DIGITAL INPUTS
Remote Control of the Network Input	Relay activated by +24 VDC / 30 mA
Control of the Electromagnetic Clutch	Relay activated by +24 VDC / 15 mA
Stand-by (enable)	Optocoupler activated by +24 VDC / 10 mA
DIGITAL OUTPUTS
Alarms	2 open collector outputs: temperature, electrical circuit U_max = 30 V, I_max = 100 mA
GENERAL ALARM
Relay Contact	10 A / 230 VAC
ENVIRONMENTAL CHARACTERISTICS
Operating Temperature	0°C to +50°C
Storage Temperature	-20°C to +70°C
Humidity	0 to 90% as per DIN 40040
Protection Class	IP 66
Assembly	The housing must be electrically and thermally coupled to the metal frame of the test bench to allow heat dissipation.
MECHANICAL CHARACTERISTICS
Housing	Extruded cast aluminium
Weight	2.5 kg; 5.51 lb
Dimension Drawing (PDF)	For WB/PB 2.7 and 43	For WB/PB 65, 115, 1 PB 15 and 1 WB 15 For 3, 4 WB 15 and 4 PB 15

Magtrol, Inc (USA): 716-668-5555 • magtrol@magtrol.com ~ Magtrol SA (Switzerland): 41 (0)26 407 3000 • magtrol@magtrol.ch