SIEMENS 6EP1933-2EC51-8AA0 Uninterruptible Power Supply Instruction Manual

: June 4, 2024
: SIEMENS

Table of Contents

Dimension drawings
Description and Design
Technical Data
Settings.
Protective and Monitoring Functions
Signaling
Environment
Installation Instructions
Connection and Terminal Assignments
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

SITOP UPS500S Ex –the basic unit
6EP1933-2EC51-8AA0
SITOP UPS501S Ex-expansion module
6EP1935-5PG01-8AA0
Operating Instructions
A5E51289135

Dimension drawings

6EP1933-2EC51-8AA0 / 6EP1935-5PG01-8AA0 SIEMENS 6EP1933 2EC51 8AA0
Uninterruptible Power Supply - Fig

Note
These operating instructions do not purport to cover all details of the product, nor to provide for every possible contingency that may arise during installation, operation, or maintenance. Subject to change without notice. The German text applies in cases of doubt.

**| WARNINGS
Only properly qualified personnel may work on or around this equipment. The successful and safe operation of this equipment is dependent on proper handling, storage, and installation. Correct functioning is also dependent on the use of SITOP ultra modules
---|---
| CAUTION
Only trained personnel may open the unit. Electrostatically sensitive devices (ESD)
**| Disposal Guideline
Packaging and packing aids can be recycled and should always be disposed of for reuse. The product itself shall not be disposed of as normal domestic waste.

Description and Design

The DC-UPS is a chassis unit in the SITOP power product range for mounting on a DIN rail of type TH 35-15/7,5 (EN 60715).
The basic units and the expansion modules must be installed in accordance with the applicable DIN/VDE specifications or pertinent regulations in the country of installation.
It buffers a proportion of the load current (max. 15A) of 24V load current supplies in the SITOP range.
Input “Input L+” on the DC-UPS basic units must be connected to output L+ of the 24V DC power supply unit and input “Input M” to output M of the power supply unit.
It is possible to connect max. 3 expansion modules via the connectors X10 and X30. The loads to be buffered are supplied via outputs “Output L+” and “Output M” on
the DC-UPS basic unit with the voltage connected to the input. If the 24V DC supply voltage fails or drops below the set cut-in threshold, the expansion module or the
internal capacitors are connected in to supply the loads.
The cut-in threshold, charging power, and buffering time can be set via DIP switches. A switch is provided for setting a defined buffering (stored energy) time with
subsequent disconnection (see Settings), one switch for bridging the ON/OFF circuit, one switch for choosing if the output voltage is interrupted for 5 s at the end of the
buffering time or not.
The operating states of the DC-UPS basic unit are signaled by four LEDs, two floating changeovers and one normally-open contact and a USB interface (see
Signaling) and the control signal “Remote Timerstart” and “Shutdown”.

Technical Data

Input quantities	Output quantities:

Rated input voltage: Operating voltage range:
Max. input current at 24V and capacitor charging:
Max. input current at 24V and charged capacitors:
Power loss at 24V and capacitor charging:
Power loss at 24V and charged capacitors:
Charging time with low charging power and basic unit -Charging time with high charging power and basic unit Charging time with low charging power and basic unit -appr. 430s| 24V DC
22 to 29V DC
17.5A DC
15.2A DC
appr. 11.0W
appr. 9.0W
2EC51-: appr. 220s
-2EC51-: appr. 120s
2EC51- and one expansion module:| Rated output DC voltage:
Rated output direct current:
Output current range:
The output characteristic of charge Output characteristic of the charging regulator:
The capacitors are charged at an adjustable constant power until the end-of- charge voltage is reached. End-of-charge voltage: Charging current: Buffering time at 15A load current with basic unit Buffering time at 15A load current with a basic unit on expansion module: tp =(see diagram 1 on page 7)| VA1 = 24V DC
IA1 = 15A DC
IA1 = 0 … 15A DC
V = 21.8V DC
P = 1 or 2A
-2EC51-: tp = 9s (Typ.)
-2EC51- and one add
The 20s (Typ.)

Settings.

Setting the cut-in threshold:
If the input voltage drops below the selected cut-in threshold voltage, the DC-UPS basic unit switches over to floating operation. The loads are then supplied solely by the DC UPS. The cut-in threshold is set via three DIP switches (see page 2 for position) according to table 1 (see page 7).
Setting range: 22.0 to 25.5V DC in 0.5-steps (delivery state: 22.5V DC ± 0.1V), accuracy ± 1.8%
Setting the charging current:
The expansion module or the internal capacitors are charged via constant current until the set end-of-charge voltage is reached. Charging is then terminated. The setting of the charging current determines how quickly the buffer-ready state is restored after a discharging process. The charging current is set by a DIP switch (position see page 2). Setting range: Typ. 1A or type. 2A (delivery state: 1A)
Setting the operating state ON/OFF:
Caution: For normal operation “ON” state is necessary (delivery state is “OFF”), in order to achieve that use DIP-switch closed or terminals X2.8 and X2.9 connected with X2.10 To prevent the capacitors from being discharged unintentionally (e.g. when the system power is disconnected), the DC-UPS basic unit can be switched with a DIPswitch (or a wire jumper (or floating connection) inserted between terminals X2.9 and X2.10) to operating state “OFF” (delivery state). In the “ON” state (DIP-switch closed or terminals X2.8 and X2.9 connected with a floating normally-open contact (Vmax = 15V DC, Imax = 10mA) ), the DC-UPS basic unit is fully functional according to specification. In the “OFF” state, the module does not switch over to floating operation when the mains supply is disconnected but remains functional in every other respect. If the DC-UPS basic unit is switched to “OFF” in floating operation, it stops operating in floating mode. During normal operation, the polling interval for the ON/OFF setting is appr. The 20s.
Setting the buffering time:
The buffering time is set via five DIP switches (see page 2 for position) as illustrated in Table 2 (see page 7) in 10s-steps from 5s to 315s. By switch 5 (delivery state max. time) you can choose whether the floating operation will be terminated after a prespecified period or when the exhaustive discharge threshold of the capacitors (= maximum buffering time) is reached (delivery state: max. buffering time). Using the remote signal starts the timer to terminate after a prespecified period. Once the buffering has been terminated, there is no way in which the floating operation can be restarted again by altering the switch setting. Only when the input voltage has recovered floating operation can be resumed. The buffering time is an appr. 3s with fully charged capacitors and a load current of 15A. Interruption of the output voltage: By a DIP-switch (see page 2 for position) you can choose if the output voltage is interrupted for 5 s at the end of the buffering time or

Protective and Monitoring Functions

Reverse polarity protection: The DC-UPS basic unit is electronically protected against polarity reversal of the input voltage.
Overcurrent and short-circuit protection: In normal operation and floating operation the DC-UPS basic unit is protected by the internal dynamic current
limitation and the internal static current limitation. Dynamic current limitation limits the output current to typ. 25A. Static dynamic limitation shuts down the output if currents are greater than typ. 18A after about 110ms at short-circuit, and after about 200ms at overload. An internal (not accessible) 20A fuse protects the module in the event of a fault. In normal operation, automatic restart attempts are made approximately every 20s. In floating operation the module shuts down in-store mode.
Restart after returning to normal operation.

Signaling

“Normal operation”, i.e. the input voltage at the DC-UPS basic unit is higher than the set cut-in threshold. The loads are being fed by the line-side power supply. If an expansion module is connected, it is fully charged. Under normal operation, the green LED (o.k.) is illuminated and relay contact X2.2 – X2.3 (o.k.) is closed. “>85% charge”, i.e. capacitor is loaded more than 85% (available rest capacity dependent upon aging). The second green LED (Bat>85%) is illuminated and relay contact X2.7 – X2.8 is closed. (second green LED off and relay contact X2.7 – X2.8 open (de-energized position when the unit is disconnected) means: Bat<85%, i.e. capacitor charge below 85%)
“Floating operation”, i.e. the input voltage is lower than the set cut-in threshold. The loads are being supplied by the DC-UPS. In floating operation, the yellow LED (Bat) is illuminated, and relay contact X2.1 – X2.2 (Bat) is closed (de-energized position when the unit is disconnected).
Alarm signal “Buffering not ready”: When the “Buffering not ready” signal is active, the red LED (Alarm) is illuminated and relay contact X2.4 – X2.5 (Alarm) closed (de-energized position when the unit is disconnected). Causes for the “Buffering not ready” state in normal operation are as follows: “OFF” operating state, defective capacitors or capacitor voltage < 7V. The interval for polling the operating states ON/OFF, capacitors or capacitor voltage < 7V, and for activating the relevant signal output is 20 s during normal operation. After the end of the failure, the signal remains till to the next polling. The “Alarm” signal in floating operation means that the capacitor voltage has dropped to <12V and automatic disconnection is imminent. When the floating operation has been finished due to overload, short circuit, exhaustive discharge protection or buffering timeout, the red LED (Alarm) gets dark, but relay contact X2.4 – X2.5 remains closed. Load rating of relay contacts (SELV (ES1) must be maintained): 30 V DC/1 A.
USB: The signals are additional outputs via a PC-capable USB interface. They are each displayed in the shape of 5 characters of plain text. The assignment is shown in the table on the right. A tool for reading out and processing the signals is available free of charge on the Internet at http://www.siemens.com/sitop-ups. This website also contains
further information about the interface.
Technical specification: The USB interface is according to specification 2.0, the communication runs only at full speed, i.e. 12Mbit/s. The Interface will be supplied by the DC- PS with +5V (“self-powered”), signal state output every 75ms ± 20%; data output 29ms ± 20%, pause 46ms ± 20%. The connection to the PC is made by means of a usual 4- ired shielded USB cable with a wave-resistance of 90Ohm, a USB Series” A” connector to the PC, and a USB Series “B” connector to the DC-UPS and a maximum length of 5m. The cable contains two 28 to 20 AWG “non-twisted” supply wires (VBUS and GND) and two 28 AWG “twisted pair” data wires (D+ and D-). Pin
assignment:
Pin assignment: Pin1: VBUS (+4.4V to +5.25V DC), transmit data on Pin2 (D-) and Pin3 (D+), Pin4: GND Receiving data: Receive of the character “R” (Signal Remote Timerstart) starts the timer of the DC-UPS basic unit with the set buffering time (table 2). After the set buffering time, the floating operation ends or, during normal operation, the output voltage is interrupted for 5 s if “disconnection” is set. Receipt of the character “S” (shutdown signal) starts the timer in the DC-UPS basic unit with the set buffering time (table 2). After the set buffering time the DC-UPS basic unit is switched off retentively. It is restarted by disconnecting the DC supply voltage for at least 1 s. In combination with a SITOP power supply, the line voltage has to be interrupted for approx. 10 s for a restart.

Signal	Text
Buffering ready Buffering not ready	BUFORD

ALARM
Normal operation Not normal operation| DC OK DC LO
Not floating operation Floating operation| BAT

85% charge
<85% charge| BA>85
BA<85

Environment

Operating conditions acc. to EN 60721-3-3, climate model 3K3 (relative air humidity 5% to 85%, absolute air humidity 1 g/m 3 to 25 g/m 3 , no condensation)
The stationary operation, weather protected, pollution degree 2 Temperature for storage and shipment: -40 to +70°C Temperature for operation: 0 to +60°C
Overvoltage category: II to 2000 m
Weight
6EP1933-2EC51-8AA0 1.2kg
6EP1935-5PG01-8AA0 0.7kg
Standards
Degree of protection: IP20 to EN60529
Protection class III, designed to be connected to regulated 24 V DC power supplies
Protection class III to EN60950
UL 508 / CSA C22.2 File E197259
The device complies with ATEX directive 2014/34/EU; EN 60079-0; EN 60079-ATEX (see page 8), DNV GL and ABS

Installation Instructions

In order to guarantee effective cooling, the unit must be vertically installed such that the input and output terminals and the incoming air slots are at the bottom. A
clearance of at least 50 mm must be left above and below the unit. For assembly/disassembly see page 8.
To reduce EMI and thermal strain DC-UPS and capacitor modules should be installed at least 50cm away from commutating chokes! Interface (USB) and control lead(ON/OFF control circuit) must not be laid directly in parallel to power leads or cables (especially leads between frequency converter and motor or frequency converter and commutating choke).
To minimize EMI the distance to those leads should be at least 10cm.
If the device is to be used in a hazardous zone it must be installed in an enclosure with a degree of protection IP54 or higher. This enclosure must comply with the requirements of EN 60079-0.
**** Before commencing with the installation or any repair work, switch off the plant main switch and lock it in the “OFF” position. Please read the operating instructions for SITOP power.

Connection and Terminal Assignments

Terminals	Function	Cable cross-section	Comments
X1.1	Input voltage DC 24V	1.0 … 4mm2 17…11 AWG	Screw-type terminals for a

Use copper wire approved for 60/75 °C.
CAUTION
The external circuitry of all terminals (including signaling and status contacts) must meet the safety requirements stipulated by
EN61204-7: SELV (ES1).
Table 1: Adjustable cut-in threshold

Table 2: Adjustable buffering time
Setting to terminate when the exhaustive discharge threshold of the capacitors is reached. An interruption is started by the remote signal. (DIP- switch Disconnection –On) SIEMENS 6EP1933 2EC51 8AA0 Uninterruptible Power
Supply - Fig 1

Diagram 1: buffering time SIEMENS 6EP1933 2EC51 8AA0 Uninterruptible
Power Supply - Fig 3

Standards:
ATEX
6EP1933-2EC51-8AA0:

II 3G Ex ec nC IIC T4 Gc
WARNING: SEPARATE EXPANSION MODULE IN NON-HAZARDOUS AREAS ONLY!
Hazardous Areas: An enclosure/cabinet rated min. IP54 must be provided in the final installation.
The enclosure/cabinet must be in accordance with the requirement of EN 60079-0:2009 and/or EN60079-7:2010
DIP switches shall not be used in operation or while a hazardous area may be present
Only locking USB-cable type (Partno: Y-Con IP20LOCK-104 cable assy Distributor: Yamaichi) shall be used
WARNING
SEPARATE TERMINALS IN NON-HAZARDOUS AREAL ONLY!
ACTUATE SWITCHES IN NON-HAZARDOUS AREAS ONLY!
The signal plug must not be used without additional fixings in explosive atmospheres to fulfill the requirements according to EN 60079-7. 6EP1935-5PG01-8AA0:

II 3G Ex ec IIC T4 Gc
WARNING: SEPARATE EXPANSION MODULE IN NON-HAZARDOUS AREAS ONLY!
Hazardous Areas: An enclosure/cabinet rated min. IP54 must be provided in the final installation.
The enclosure/cabinet must be in accordance with the requirement of EN 60079-0:2009 and/or EN60079-7:2010
WARNING
SEPARATE TERMINALS IN NON-HAZARDOUS AREAL ONLY!
Availability and technical specifications are subject to change without prior notice

30PA5E51289135

Istruzioni operativehttps://support.industry.siemens.com/cs/it/it/view/31762923