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Signaling
"Normal operation", i.e. the input voltage at the DC-UPS module is higher than the set cut-in threshold. The loads are being fed by the line-side power supply. If a
battery 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. battery 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 unit is disconnected) means : Bat<85%, i.e.
battery 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 battery module. In floating operation, the yellow
LED (Bat) is illuminated and relay contact X2.1 – X2.2 (Bat) closed (de-energized position when unit is disconnected).
Alarm signal "Battery not ready": When the "Battery not ready" signal is active, the red LED (Alarm) is illuminated and relay contact X2.4 – X2.5 (Alarm) closed (de-
energized position when unit is disconnected). Causes for the "battery not ready" state in normal operation are as follows: "OFF" operating state, no battery module
connected, reversed polarity or defective battery (battery voltage < 18.5V) or open circuit between battery and UPS module. The interval for polling the operating
states ON/OFF, reversed polariy, defective battery or no battery module connected, open circuit between battery and UPS module, 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.
If the signal flashes in a 2s cycle, this indicates that the battery is defective, but still capable of floating operation. The specified buffering times cannot be kept in such
cases. The battery module must be replaced.
The "Alarm" signal in floating operation means that the battery voltage has dropped to <20.4V and automatic disconnection to protect the battery is imminent. When
the battery has been disconnected 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: 60V DC / 1A or 30V AC / 1A
USB:
The signals are additionally 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.ad.siemens.de/sitop. 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-UPS 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-wired
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 module and a maximum length of 5m. The cable contains two 28 to 20 AWG "non-twisted"
USB-supply wires (VBUS and GND) and two 28 AWG "twisted pair" data wires (D+ and D-).
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 module with
the set buffering time (table 2) (only with setting "max. time" and "disconnection"). After the set buffering time the
floating operation ends or the output voltage will be disconnected.
Environment
Operating conditions acc. to EN 60721-3-3, climate model 3K3 (relative air
humidity 5% to 85%, absolute air humidity 1 g/m
Stationary operation, weather protected, pollution degree 2
Temperature for storage and shipment:
Temperature for operation:
Weight
6EP1933-2EC41
1.0kg
6EP1933-2EC51
1.2kg
6EP1935-5PG01
0.7kg
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. 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
leads (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.
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
X1.1
Input voltage DC 24V
X1.3, X1.5
Output voltage DC 24V
X1.2/X1.4, X1.6
Input/output voltage DC 0V
X1.7/X1.8
Battery module DC 24V
X2.1,2,3
Signal: Normal operation / Floating operation
X2.4,5,6
Signal: Battery not ready / ready
X2.7,8
Signal: charge >85%
X2.9/X2.10
On/Off jumper (no jumper =Off)
X3
Serial interface or USB-interface
X10
Capacitor module
CAUTION
!
The external circuitry of all terminals (including signaling and status contacts) must meet the safety requirements stipulated by
VDE 0805 (EN 60950): SELV.
Disposal regulations
Packaging and packing aids can be recycled and should always be disposed of for reuse.
Siemens AG Österreich, 10/2008
3
3
to 25 g/m
, no condensation)
-40 to +70°C
0 to +60°C
Cable cross-
section
1.0 ... 4mm
17...11 AWG
0.5... 2.5mm
20...13 AWG
Standards
Degree of protection: IP20 to EN60529 (VDE 0470 Part1)
Protection class III to EN60950
VDE 0100 Part 410 (IEC 364-4-41)
VDE 0106 Part 1 (IEC 536)
VDE 0113 Part 1 (EN 60204-1)
IEC 61131; ; UL 508 / CSA C22.2 File E197259
Cable length
Comments
2
up to 3m
Screw-type terminals for screwdriver with
up to 3m
4.5mm blade width
up to 3m
Recommended tightening torque 0.7-0.9Nm
2
up to 3m
Screw-type terminals for screwdriver with
up to 3m
3.5mm blade width
up to 3m
Recommended tightening torque 0.5-0.7Nm
See description above
Tailored wire set
6 von 8
English
Signal
Text
Buffering ready
BUFRD
Buffering not ready
ALARM
Normal operation
DC_OK
Not normal operation
DC_LO
Not floating operation
*****
Floating operation
*BAT*
>85% charge
BA>85
<85% charge
BA<85
SITOP UPS 500S
SITOP UPS 501S
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