Siemens SITOP 6EP1931-2DC21 Betriebsanleitung Seite 6

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%. 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
Interface
: With module type 6EP1931-2DC31, the signals are additionally outputs via a PC-capable serial interface. They are each
displayed in the shape of 5 characters of plain text. The assignment is shown in the table on the right. When the battery is defective, the
signal "Battery ready / not ready" is displayed alternately in a 0.25Hz cycle with a duty cycle of 0.5. 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: 8N1 transmit and receiving, 9600 baud, 8 data bits, 1 stop bit, no parity bit, signal state output every 84ms ± 20%;
data output 29ms ± 20%, pause 55ms ± 20%.PC-interface has to be safety separated according to EN 60950. The connection to the PC is
made by means of a continuous 9-way SUB-D extension lead, (plug/socket), although only 3 pins are needed. (Pin2, Pin3, Pin7)
Transmit data: Pin2: RXD (data line, acc. to Pin3 of a 25-way plug/socket); Pin3: TDX (neg. supply for the interface, acc. to Pin2 of a 25-
way plug/socket); Pin7: RTS (pos. supply for the interface and at the same time data input line for the remote signal, acc. to Pin4 of a 25-
way plug/socket).
Receiving data: Pin7 ( acc. to Pin4 of a 25-way plug/socket): Signal Remote Timerstart. The timer of the UPS module is started 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. Sequence of the necessary remote signal see diagram1 (page 8), generated by On and Off of the
supply voltage.
USB:
With module 6EP1931-2DC41, 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 above. 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
6EP1931-2DC21 0.4kg
6EP1931-2DC31/41 0.45kg
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 modules and their battery modules should be installed at least 50cm away from commutating chokes ! Interfaces (serial, 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. Battery modules should be connected low-resistively (4 mm
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.
The fuse on the battery module must be removed before any work is carried out.
Maintenance Instructions for Battery modules
To maintain the life cycle of lead gel accumulators as long as possible, it is recommended to discharge them several times down to appr. 19V and then re-charge them (approx. 3 times
discharge / charge, discharge for instance by the DC loads of the plant, buffer time set to maximum; re-charge by DC-UPS module) at the first start-up of the machine.
With pure lead battery modules this is not necessary.
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
! CAUTION
The external circuitry of all terminals (including signaling and status contacts) must meet the safety requirements stipulated by
VDE 0805 (EN 60950): SELV.
Siemens AG Österreich, 10/2005
3 3
to 25 g/m , no condensation)
-40 to +70° C
0 to +60° C
Cable cross-
section
2
1.0 ... 4mm
17...11 AWG
2
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
RI suppression to EN55022, limit-value curve B
Interference immunity to EN 61000-6-2
2
) and in a cool place (in cubicles usually at the lower end).
Cable length Comments
up to 2m Screw-type terminals for screwdriver with
4.5mm blade width
up to 2.5m Recommended tightening torque 0.7-0.9Nm
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
6 of 8
English
Signal Text
Battery ready BUFRD
Battery 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 DC-USV-Modul 6