Siemens 6ES5984-1UA41 Power Supply | 24V DC 2A for S5-100U

The Siemens 6ES5984-1UA41 power supply provides DC power for SIMATIC S5-100U rack systems. This unit converts AC line voltage into stable 24 V DC output. It mounts directly into the leftmost slot of the S5-100U rack. You can use this supply as a direct replacement for failed power units.

Detailed Technical Specifications

The Siemens 6ES5984-1UA41 power supply measures 160 mm in width. Its height reaches 110 mm across the front face. The total depth goes up to 120 mm including terminal connections. This unit weighs approximately 0.85 kilograms for secure mounting.

Key hardware parameters include:

Complete Model: Siemens 6ES5984-1UA41
Input voltage: 120/230 V AC selectable (47-63 Hz)
Input current: 1.2 A at 120 V, 0.6 A at 230 V
Output voltage: 24 V DC regulated
Output current: 2 A continuous rating
Output power: 48 W maximum
Hold-up time: 30 ms at full load
Energy storage: Two large electrolytic capacitors (1000 µF each)
Efficiency: 82% typical at nominal load
Ripple: Less than 50 mV peak-to-peak
Protection: Short-circuit and overvoltage
Indicators: One green LED for DC output OK

The Siemens 6ES5984-1UA41 power supply stores significant energy in its capacitors. Therefore, technicians must wait sixty seconds after AC removal before handling. The unit operates reliably from 0°C to +60°C. Moreover, it includes a voltage selector switch for 120 V or 230 V operation.

Technical Parameter	Specification
Full Model Number	Siemens 6ES5984-1UA41
Width x Height x Depth	160 mm x 110 mm x 120 mm
Weight	0.85 kg
Input Voltage	120/230 V AC selectable
Input Frequency	47-63 Hz
Input Current	1.2 A / 0.6 A
Output Voltage	24 V DC regulated
Output Current	2 A continuous
Output Power	48 W
Hold-up Time	30 ms
Energy Storage Caps	2 x 1000 µF
Efficiency	82% typical
Output Ripple	<50 mV peak-peak
Operating Temperature	0°C to +60°C
Humidity Tolerance	5% to 85% non-condensing

Application and Installation

The Siemens 6ES5984-1UA41 power supply slots into the leftmost position of an S5-100U rack. It powers all backplane modules including the CPU and I/O cards. This unit provides backup power for the CPU’s internal RAM. Consequently, your program remains safe for up to two weeks without mains power.

Protection and Reliability

This supply features fold-back current limiting for short-circuit protection. Its overvoltage crowbar circuit prevents damage to downstream modules. The Siemens 6ES5984-1UA41 includes a thermal shutdown for overheating conditions. Therefore, the unit recovers automatically when the temperature normalizes.

Always select the correct input voltage before applying AC power. Connect the ground terminal to the mounting rack for safety. The unit features a removable fuse holder on the bottom panel. Furthermore, its metal housing provides excellent electromagnetic shielding.