Product | DC UPS module 40 A |
Power supply, type | 40 A |
Order No. | 6EP1 931-2FC21
6EP1 931-2FC42 (with USB interface) |
Input L+/M in normal operation | Controlled DC voltage |
Rated voltage Uin rated1) | 24 V DC |
Voltage range | 22 ... 29 V |
Connection threshold for battery | 22.5 V DC ± 0.1 V (factory setting),
adjustable in the range 22 ... 25.5 V DC (in 0.5 V increments) |
Rated current Iin rated | 40 A + approx. 2.6 A with empty battery |
Mains buffering | |
Line buffering or buffer time | Dependent on connected battery and load current, see selection table battery module and mains buffering times as well as the relevant important information notes! |
On/off control circuit | External isolated NO contact required (loading max. 15 V DC/max. 10 mA).
With an open control circuit, the battery is isolated from output L+, thus canceling line buffering. If there is no input voltage, a quiescent current of approximately 0.3 mA is drawn from the battery disconnected from the output. |
Methods of setting the buffering time | Adjustable using DIP switches to a maximum buffering time up to forced shutdown through exhaustive discharge protection (at approx. 19 V) or to a time limit of 5 ... 635 s
(in 10 s increments) |
Interruption | Adjustable using DIP switch, either: - Interruption of the output voltage despite returning input voltage for min. 5 s following expiry of set buffering time to support automatic restarting of industrial PCs
- No forced interruption on expiry of the set buffer time
|
Output L+/M in normal operation | |
Rated voltage Uout rated | 24 V DC (output voltage of SITOP power supply) |
Voltage range | Input voltage Uin less approx. 0.5 V DC |
Startup delay | Approx. 1 s |
Voltage rise | Typ. 360 ms |
Output current Iout | 0 ... 40 A |
Dynamic current with overload | Electronic current limitation to 1.05 ... 1.4 x Iout rated for approx. 80 ms, then electronic shutdown of the output with automatic restart attempts (approx. 20 s intervals between restart attempts) |
Dynamic current with short-circuit | Electronic current limitation to 1.5 ... 3 x Iout rated for approx. 20 ms, then electronic shutdown of the output with automatic restart attempts (approx. 20 s intervals between restart attempts) |
Output L+/M with battery operation | |
Rated voltage Uout rated | 24 V DC (from battery module) |
Approximate voltage range | 27 ... 19 V DC at Iout = 0.05 x C x 1/h or
24 V at Iout = 1 x C x 1/h or
23 V at Iout = 2 x C x 1/h
(C = total connected battery capacity in Ah), 19 V disconnection threshold for exhaustive discharge protection |
Output current Iout2) | 0 ... 40 A (permanently permissible) |
Dynamic current with overload | Electronic current limitation to 1.05 ... 1.4 x Iout rated for approx. 80 ms, then buffering switch-off of output (restart following return to normal operation) |
Dynamic current with short-circuit | Electronic current limitation to 1.5 ... 3 x Iout rated for approx. 20 ms, then buffering switch-off of output (restart following return to normal operation) |
Output +Bat/-Bat in normal operation | I-V charging characteristic
(first constant current I, then constant voltage U) |
End-of-charge voltage U | 26.6 V DC ± 0.1 V (factory setting for +40°C battery temperature),
adjustable in the range 26.3 ... 29.3 V (in 0.1 V increments) |
Load current I | Approx. 2 A (factory setting), ?adjustable to 1 A or 2 A
(charging is carried out with closed and open on/off circuit)
At a battery voltage of < 6 V (batteries defective), charging is not carried out as a protective measure. |
Efficiency/heat loss | |
At Uout rated, Iout rated approx. | 97.2 %/28.6 W |
With battery operation, approx. | 96.9 %/33.6 W |
Protection and monitoring | |
Reverse polarity protection | Against polarity reversal on input voltage and batteries |
Overload protection | In accordance with "dynamic current with overload" in normal operation (automatic restart attempts) or in battery mode (restart following return to normal operation) |
Short-circuit protection | In accordance with "dynamic current with short-circuit" in normal operation (automatic restart attempts) or in battery mode (restart following return to normal operation). Built-in (not accessible) 16 A fuse (6 A and 15 A on DC UPS module) or 64 A fuse (40 A on DC UPS module). |
Exhaustive discharge protection | Automatic shutdown when battery voltage falls below approx. 19 V.
At a battery voltage of < 6 V (batteries defective), charging is not carried out as a protective measure. |
Monitoring
"Wire breakage in battery circuit" | Alarm signal if battery circuit not closed or if it opens during operation (cyclic check approximately every 20 s) |
Monitoring
"Battery replacement required" | Alarm signal flashing at approx. 0.25 Hz repetition frequency (approx. 2 s alarm, approx. 2 no alarm, approx. 2 s alarm, etc.).
Check every 4 hours with 1 ohm load for 1 s if no buffer mode or switch-off has taken place within 4 hours.
No monitoring if switch position of compatibility switch is "On"! |
Monitoring
"Battery charge status > 85%" | Indication whether batteries are charged to at least 85% of residual capacity still available depending on aging |
Signaling3) | |
Normal operation | Green LED (OK) and isolated changeover contact
"24 V DC OK/Bat" at setting "24 V DC OK" 4) |
Buffering or battery operation (battery supplies load alone or in addition to PS in the case of overload) | Yellow LED (Bat) and isolated changeover contact
"24 V DC OK/Bat" at setting "Bat" (neutral position) |
Alarm (buffer not ready, or prewarning at and above < 20.4 V battery voltage) | Red LED (alarm) and isolated changeover contact at setting "Alarm" (= off position). Causes of the buffer not being ready during normal operation can include: Off status or open on/off control circuit, battery module not connected, polarity reversal or defective battery (battery voltage < 18.5 V) or wire breakage between battery and UPS module. Signal is scanned and, thus, updated, every 20 s. Causes of the buffer not being available during buffer operation can include: Battery voltage has dropped below 20.4 V DC (= prewarning before shutdown through exhaustive discharge protection) as well as shutdown of the battery due to overload, short-circuit, exhaustive discharge protection or expired backup time. The red LED then goes out. |
"Battery replacement required" | Red LED (alarm) flashing at 0.25 Hz and floating changeover contact (alarm) switching at approx. 0.25 Hz |
"Battery charge status > 85%" | Second green LED (Bat > 85%) and isolated NO contact closed (off position = open) |
Compatibility switch (only with 6EP1931-2FC21) | The following can be selected using DIP switches: Switch position "Off" - "significant properties analogous to new DC UPS range" or "On" switch position - "analogous to previous DC UPS module 40 (6EP1931-2FC01)". With compatibility switch in "On" position: Changed output of the alarm signal: – the red LED flashes on wire-break between battery module and DC-UPS module with 1/3 Hz and isolated changeover contact (alarm) switching at approx. 1/3 Hz. A battery test does not take place |
Optional interface and software | |
Serial interface | - |
USB interface | Only for6EP1 931-2.C42
Output of all signals and receipt of the "Remote Timerstart" signal.
Technical design: Specification 2.0 at full speed, i.e. 2 Mbit/s. Supplied with +5 V by DC UPS ("self-powered").
Required connection to PC: Commercially available 4-core shielded cable, 90 Ohm, max. 5 m, USB series "A" connector to PC and USB series "B" connector to DC UPS |
Software | A software tool (executable under Windows 2000, Windows XP, Windows Vista and Windows 7) for reading out and processing the signals can be downloaded from the Internet at http://www.siemens.de/sitop-usv This site also provides more information on the interface. |
Control signals | |
On/off control signal | Buffering is terminated or the battery is disconnected from the output by opening the control circuit or by means of DIP switches on the device (DIP switch must be in "Off" position). All other functions are retained. |
"Remote Timerstart" via serial interface or USB | Starts mains buffering for the set buffering time |
Safety | |
Primary/secondary isolation | No |
Safety class | Class III (ext. circuit and power-supply unit: SELV in accordance with EN 60950 required) |
EMC | |
Emitted interference | Radio interference suppression according to EN 55022, Class B |
Noise immunity | Noise immunity according to EN 61000-6-2 |
Environmental conditions | |
Ambient temperature during operation | -25 ... +60°C with natural convection |
Transport/storage temperature | ?40 ... +85°C |
Degree of protection (EN 60529) | IP20 |
Humidity class | Rated conditions in accordance with EN 60721, climate class 3K3 (relative humidity 5% ... 85% and absolute humidity 1 g/m3 ... 25 g/m3; no condensation) |
Approvals | |
CE marking | Yes |
UL/cUL (CSA) approval | cULus-listed (UL 508, CSA C22.2 No. 107.1), File E197259 |
Mechanics | |
Input connections 24 V DC | 2 screw-type terminals for 0.33 ... 10 mm2/22 ... 7 AWG |
Output connections 24 V DC | 4 screw-type terminals for 0.33 ... 10 mm2/22 ... 7 AWG |
Battery module connections 24 V DC | 2 screw-type terminals for 0.33 ... 10 mm2/22 ... 7 AWG |
Connections for control circuit and alarm signals | 10 screw-type terminals for 0.5 ... 2.5 mm2/20 ... 13 AWG |
Dimensions (W x H x D) in mm | 102 x 125 x approx. 125 |
Weight | Approx. 1.1 kg (with serial or USB interface: approx. 1.1 kg) |
Mounting | Can be snapped onto standard mounting rail EN 60715 35x7.5/15 |
