Puls PISA-B-812-B1 User manual

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 1 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
ELECTRONIC FUSE
8X 24V, 2X 1-12A, 6X 1-10A
•Eight Current C ntr lled Outputs
•Adjustable Output Currents f r Each Channel
•Selective Tripping f Overl aded Channels
•C mpatible even with large Capacitive L ads
•Output Currents Displayed Live n LED Matrix
•Rem te Reset r Reset via Pushbutt ns
•C mm n Signaling Relay C ntact f r Tripped
Channels (PISA-B-812-B1)
•Digital C ded Signal Output f r Tripped Channels
(PISA-B-812-B4)
•Parameter Settings can be L cked by PIN-C de
•ON/OFF Feature f r Each Individual Output
•Easy Wiring - Distributi n Terminals f r Negative P le
•3 Year Warranty
GENERAL DESCRIPTION SHORT-FORM DATA
The PISA-B devices are DIN rail m untable
eight channel pr tecti n m dules with integrated
electr nic fuses f r 24V systems. They distribute the
current f a large p wer s urce t eight utput
channels each f l wer current and theref re all wing
f r smaller wires t be used.
The utput current f each channel can be set
individually. Channel 1 and 2 are ptimized f r l ads
with large input capacitances. C nnect such l ads t
these channels t av id false tripping r unexpected
switch- ff such l ads.
The PISA-B-812-B1 is equipped with a c mm n
tripping signaling relay c ntact that rep rts tripped
channels, while the PISA-B-812-B4 has a digital c ded
signal utput built in f r this functi n.
All PISA-B devices are equipped with push-in
terminals, which are ptimized f r aut mated wiring.
The mechanically r bust h using is made f a high-
grade, reinf rced m lded material n the fr nt and
f an aluminum b dy, which permits surr unding
temperatures up t +70°C.
Input v ltage DC 24V -20%/+25%
Required input v ltage
f r turning- n f utputs
19.6Vdc
Input current 40A
Internal c nsumpti n 40mA PISA-B-812-B1
35mA PISA-B-812-B4
Adjustable
1/2/3/4/6/8/10/12A CH1 and CH2
N minal utput current
1/2/3/4/6/8/10A CH3 t CH8
40A Bel w +60°C ambientSum current all channels
30A At +70°C ambient
Derate between +60°C and +70°C
Current limitati n
CH1-CH2 200% F r 1A setting
150% F r 2 - 8A settings
130% F r 10 - 12A settings
CH3-CH8 50A
Tripping characteristics Sl w r Fast Selectable
Tripping delay
CH1-CH2 2ms – 2s At sh rt circuit
CH3-CH8 <10ms At sh rt circuit
CH1-CH8 1.1s F r sl w tripping at 1.5x
n minal current
CH1-CH8 0.22s F r fast tripping at 1.5x
n minal current
Max l ad capacitance capability
CH1-CH2 100mF Per channel
CH3-CH8 20mF Per channel
V ltage dr p per channel
CH1-CH2 125mV F r 10A l ad
CH3-CH8 165mV F r 10A l ad
Standby l sses 1W
P wer l sses 10.8W At 8x 5A l ad
Temperature range -25°C t 70°C
Size (w x h x d) 52x124x130mm With ut DIN rail
Weight 370g / 0.82lb
ORDER NUMBERS MAIN APPROVALS
Description: Electr nic Fuse PISA-B-812-Bx-xx
Order Number:
PISA-B-812-B1 C mm n signaling relay c ntact
PISA-B-812-B4 Digital c ded signal utput
Accessories:
BUS-BAR1-L1 2: A set f r 2 m dules
BUS-BAR1-L155: A set f r 3 m dules
BUS-BAR1-L5 : Single piece L=500mm
F r details and a c mplete appr val list, see chapter 20.
UL 2367 UL 61010-2-201 IEC 61010
IEC 62368 planned

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 2 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
Index
1 Intended Use....................................................... 3
2 Installati n Instructi ns...................................... 3
3 Typical Wiring Scheme....................................... 4
4 DC-Input.............................................................. 5
5 Output................................................................. 5
6 Output Tripping Characterstics......................... 7
7 C ntr l and M nit ring Features..................... 8
8 Digital C ded Interface (PISA-B-812-B4)........... 11
9 Alarm Relay C ntact (PISA-B-812-B1)................ 11
10 Reset Input.......................................................... 11
11 Efficiency and P wer L sses.............................. 11
12 Functi nal Diagram............................................ 12
13 Fr nt Side And User Elements........................... 13
14 Terminals And Wiring........................................ 13
15 Lifetime Expectancy........................................... 14
16 MTBF.................................................................... 14
17 EMC..................................................................... 15
18 Envir nment....................................................... 16
19 Safety Features and Pr tecti n Features.......... 17
20 Appr vals and Fulfilled Standards.................... 18
21 Regulat ry C mpliance...................................... 18
22 Physical Dimensi ns And Weight...................... 19
23 Access ries.......................................................... 20
23.1 P wer C nnecti n - P wer-Bus-Bars...... 20
The inf rmati n given in this d cument is c rrect t the best f ur kn wledge and experience at the time f publicati n.
If n t expressly agreed therwise, this inf rmati n d es n t represent a warranty in the legal sense f the w rd. As the
state f ur kn wledge and experience is c nstantly changing, the inf rmati n in this data sheet is subject t revisi n. We
theref re kindly ask y u t always use the latest issue f this d cument (available under www.pulsp wer.c m).
N part f this d cument may be repr duced r utilized in any f rm with ut ur pri r permissi n in writing.
Packaging and packaging aids can and sh uld always be recycled. The pr duct itself may n t be disp sed f as d mestic
refuse.
TERMINOLOGY AND ABBREVIATIONS
DC 24V A figure displayed with the AC r DC bef re the value represents a n minal v ltage with
standard t lerances (usually ±15%) included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) r flat (10V)
24Vdc A figure with the unit (Vdc) at the end is a m mentary figure with ut any additi nal
t lerances included.
may A key w rd indicating flexibility f ch ice with n implied preference.
shall A key w rd indicating a mandat ry requirement.
should A key w rd indicating flexibility f ch ice with a str ngly preferred implementati n.

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 3 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
1. Intended Use
This device is designed f r installati n in an encl sure and is intended f r c mmercial use, such as in industrial c ntr l,
pr cess c ntr l, m nit ring and measurement equipment r the like.
D n t use this device in equipment, where malfuncti ning may cause severe pers nal injury r threaten human life with ut
additi nal appr priate safety devices, that are suited f r the end-applicati n.
If this device is used in a manner utside f its specificati n, the pr tecti n pr vided by the device may be impaired.
2. Installati n Instructi ns
DANGER Risk of electrical shock, fire, personal injury or death.
– Turn p wer ff bef re w rking n the device. Pr tect against inadvertent re-p wering.
– D n t pen, m dify r repair the device.
– Use cauti n t prevent any f reign bjects fr m entering the h using.
– D n t use in wet l cati ns r in areas where m isture r c ndensati n can be expected.
– D n t t uch during p wer- n, and immediately after p wer- ff. H t surfaces may cause burns.
Obey the following installation instructions:
This device may nly be installed and put int perati n by qualified pers nnel. This device d es n t c ntain serviceable
parts. If damage r malfuncti n sh uld ccur during installati n r perati n, immediately turn p wer ff and send unit
t the fact ry f r inspecti n.
Install the device in an encl sure pr viding pr tecti n against electrical, mechanical and fire hazards. Install the device
nt a DIN rail acc rding t EN 60715 with the input terminals n t p f the unit.
Up t eight devices can be c nnected via tw p wer-bus-bars, where nly ne device is c nnected t the p wer supply.
The p wer-bus-bars must be l ng en ugh t make a c nnecti n t all c ntacts f the devices.
Use an appr priately sized 24V p wer supply, which can deliver the peak current required t trip the l ad channels. If
peak currents are t l w, the supply v ltage f r the pr tecti n m dule can n l nger be maintained, which results in a
malfuncti ning f the pr tecti n m dule.
Make sure that the wiring is c rrect by f ll wing all l cal and nati nal c des. Use appr priate c pper cables that
are designed f r a minimum perating temperature f 60°C f r ambient temperatures up t +45°C, 75°C f r ambient
temperatures up t +60°C and 90°C f r ambient temperatures up t +70°C. Ensure that all strands f a stranded wire enter
the terminal c nnecti n.
The device is designed f r p lluti n degree 2 areas in c ntr lled envir nments. N c ndensati n r fr st is all wed. The
encl sure f the device pr vides a degree f ingress pr tecti n f IP20. The h using d es n t pr vide pr tecti n against
spilled liquids.
The is lati n f the devices is designed t withstand impulse v ltages up t 1.5kV acc rding t IEC 60664-1.
The input can be p wered fr m a regulated p wer supply r a similar DC s urce.
The input must be p wered fr m a PELV r SELV s urce in rder t maintain a SELV r PELV utput. Check f r c rrect input
p larity. The device will n t perate when the v ltage is reversed.
A disc nnecting means shall be pr vided f r the input f the device.
The device is designed as “Class f Pr tecti n III” equipment acc rding t IEC 61140.
The device is designed f r c nvecti n c ling and d es n t require an external fan. D n t bstruct airfl w and d n t
c ver ventilati n grid!
Keep the f ll wing minimum installati n clearances: 40mm n t p, 20mm n the b tt m, 5mm left and right side. Increase
the 5mm t 15mm in case the adjacent device is a heat s urce. Between multiple PISA-B m dules, n clearance is needed.
The device is designed f r altitudes up t 5000m (16 400ft).
The maximum surr unding air temperature is +70°C (+158°F). The perati nal temperature is the same as the ambient r
surr unding air temperature and is defined 2cm bel w the device. The device is designed t perate in areas between 5%
and 95% relative humidity.

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 4 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
3. Typical Wiring Scheme
One fuse m dule is suitable t distribute the current t 8 c nsumers. If there are m re than eight c nsumers, up t eight
fuse m dules can be used (64 c nsumers). The supply f the individual fuse m dules can be d ne by means f p wer-bus-
bars, which are available as access ry parts. The supply f the 24V is then nly d ne by ne fuse m dule, preferably in
the middle, because the current is then better distributed in b th directi ns and the permissible current f the p wer-bus-
bar f 32A is n t exceeded.
Fuse m dules can be lined up n the DIN rail with ut spacing. The p wer-bus-bars can be plugged in fr m the fr nt and
must have a length that all plug c ntacts f the m dules make a c ntact.
The (+) p le terminals f the l ads must be c nnected t the utputs f the fuse m dule. The fuse m dule als has a
distributi n f r the (-) p le c nnecti n. This internal distributi n can be used and reduces the wiring eff rt. H wever, an
external distributi n f the (-) p le c nnecti n may als be used, as sh wn in Fig. 3-2.
The channel 1 and 2 are ptimized f r l ads with large input capacitances. C nnect such l ads t these channels t av id
a false tripping r unexpected switch- ff f these channels.
Fig. 3-1: Typical wiring scheme f r ne fuse m dule (8 l ads) Fig. 3-2: Typical wiring scheme utilizing an external
distributi n terminal f r the negative p le
Fig. 3-3: Typical wiring scheme f r multiple m dules

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 5 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
4. DC-Input
The input can be p wered fr m a regulated p wer supply r a similar DC s urce. Use an appr priately sized p wer supply,
which can deliver the required utput current.
If a p wer supply with a c ntinu us utput current greater than 50A is used, a fuse r circuit breaker with 63A (B- r C-
Characteristic) must be c nnected between the p wer supply and the electr nic fuse m dule.
The c ntinu us v ltage between the input and gr und must n t exceed 60Vdc.
The input must be p wered fr m a PELV r SELV s urce r an “Is lated Sec ndary Circuit” in rder t maintain SELV r
PELV utputs.
Check f r c rrect input p larity. The device will n t perate when the v ltage is reversed.
Input v ltage n m. DC 24V -20%/+25%
Input v ltage range 19.2-30Vdc
typ. 19VdcInput v ltage required t
switch n the utputs max. 19.6Vdc
Input current max. 40A At fully l aded utputs
Stand-by current with n l ad current n the utputsInternal current
c nsumpti n typ. 40mA F r PISA-B-812-B1
typ. 35mA F r PISA-B-812-B4
5. Output
The utput can supply any kind f l ads, including inductive and capacitive l ads. The maximum size f capacitive l ads is
specified in the table bel w (see Tab. 5-1). Larger l ad capacit rs might result in an unintended turn- ff f the channel.
M re detailed inf rmati n regarding all wable capacitive l ads is available n request. If in d ubt r when y u d n t
kn w the input capacitance f y ur l ad, we rec mmend t perf rm tests with the real l ad.
Output channels can be switched n and ff separately by pushing the c rresp nding c ntr l butt n f r l nger than 50ms.
A switched ff channel is displayed with the upperm st red LED f the LED bar graph. Fact ry setting is that all channels
are switched n.
When the sum f the utput currents is greater than 40A, the device turns ff the utput channels ne by ne, starting
with the verl aded channels and f ll wed by CH8 t CH1, until the sum current is less than 40A.
Channels 1 and 2 have a current limited utput, while channels 3 t 8 have an vercurrent shutd wn behavi ur nly.
– D n t apply reverse v ltages fr m the l ad t the utput terminals that are higher than 30V and last l nger than 1s.
– D n t parallel utputs f r higher utput currents.
– D n t c nnect utputs in a series c nnecti n f r higher utput v ltages.
– D n t c nnect batteries f r charging purp ses t the utput f the device.
In rder t av id t high peak currents n the 24V supply when applying the 24V supply v ltage, the utput channels are
switched n in delayed steps. Channel 1 switches n after 50ms f ll wed by the remaining channels with a delay f 100ms
each. This scheme applies when all channels are switched n. Channels that are switched ff are skipped.
Fig. 5-1: Turn-On sequence after applying an input v ltage

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 6 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
Output v ltage n m. DC 24V The utput v ltage is equal t the input v ltage
minus the v ltage dr p f the m dule.
V ltage dr p per channel typ. 125mV F r CH1 r CH2 at 10A l ad when all ther channels
are n t l aded
typ. 190mV F r CH1 r CH2 when all channels are l aded with
5A
typ. 165mV F r CH3 t CH8 at 10A l ad when all ther channels
are n t l aded
typ. 210mV F r CH3 t CH8 when all channels are l aded with
5A
max. 40A Bel w +60°C ambientSum current f r all channels
max. 30A At +70°C ambient
n m. 1/2/3/4/6/8/10/12A F r CH1 and CH2Current settings per channel
n m. 1/2/3/4/6/8/10A F r CH3 t CH8
Fact ry setting 1A F r all channels
typ. 200% F r CH1 and CH2 in 1A settingCurrent limitati n
typ. 150% F r CH1 and CH2 in 2A t 8A settings
typ. 130% F r CH1 and CH2 in 10A and 12A settings
typ. 50A F r CH3 t CH8, independent f the settings
Channels 1 and 2 have a current limited utput, while channels 3 t 8 have
an vercurrent shutd wn behavi ur nly.
L ad capacitance capability max. 100mF F r CH1 and CH2 per channel
max. 20mF F r CH3 t CH8 per channel
Output leakage current max. 2mA Per channel, when CH1 and CH2 are switched ff
typ. 1.2mA Per channel, when CH1 and CH2 are switched ff
max. 50μA Per channel, when CH3 t CH8 are switched ff
Turn- n delay f utputs typ. 750ms Peri d between applying the input v ltage and
turning n all utput channels.
Tab. 5-1: Output data
D n t l ad the individual channels with higher average currents depending n the ambient temperature. Examples f
maximal average utput current per channel depending n the ambient temperature:
Ambient
Temperature
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 Max. sum currents
of all channels
-25°C t +40°C 12A 12A 10A 10A 10A 10A 10A 10A 40A
+41°C t +50°C 10A 10A 10A 10A 8A 8A 8A 8A 40A
+51°C t +55°C 12A 12A 8A 8A 8A 8A 8A 8A 40A
+51°C t +55°C 10A 10A 2A 10A 2A 10A 2A 2A 40A
+56°C t +60°C 8A 8A 8A 8A 8A 8A 8A 8A 40A
+56°C t +60°C 12A 12A 6A 6A 6A 8A 8A 8A 40A
+61°C t +70°C 12A 12A 6A 6A 6A 6A 6A 6A 30A

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 7 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
6. Output Tripping Characterstics
The tripping current can be set individually f r all channels and the tripping characteristic can be set t Sl w r Fast as a
c mm n parameter f r all channels.
Tripping characteristic Sl w / Fast selectable, fact ry setting is Fast
Tripping delay typ. 1.1s F r all channels in Sl w m de at 1.5x n minal current
typ. 0.22s F r all channels in Fast m de at 1.5x n minal current
typ. 2ms – 2s F r CH1 and CH2 in sh rt circuit
max. 10ms F r CH3 t CH8 in sh rt circuit
The f ll wing curves sh w the let-thr ugh current areas, which are l cated t the left f the curves, and the tripping areas,
which are l cated t the right f the curves.
Fig. 6-1: CH1 and CH2 tripping diagrams in Sl w m de Fig. 6-2: CH1 and CH2 tripping diagrams in Fast m de
Fig. 6-3: CH3 t CH8 tripping diagrams in Sl w m de Fig. 6-4: CH3 t CH8 tripping diagrams in Fast m de

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 8 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
7. C ntr l And M nit ring Features
The LED matrix display pr vides inf rmati n ab ut measurement, set parameters and err rs and c ntains tw m des. T
switch between the tw m des, the measurement m de and the parameter m de, push the SET butt n and the channel
c ntr l butt n 4.
Fig. 7-1: C ntr l and m nit ring elements
Special Key Combinations
Special sh rtcuts all w quick access t certain inf rmati n:
Press SET + CCB1 butt n: L ck/Unl ck setting with PIN
Press SET + CCB2 butt n: Sh w FW versi n
Press SET + CCB3 butt n: Sl w/Fast m de
Press SET + CCB4 butt n: Measurement/Parameter m de
Measurement Mode
The “%” scale n the left side f the LED Matrix is used in this m de, which is als indicated by the triangular LED bel w
the LED matrix display. In this m de the actual current values are sh wn and the LED matrix display als sh ws, if a channel
has switched ff due t a t high current r n purp se.
– One r m re green/yell w LEDs are n: These LEDs indicate the actual channel current in percent f the set value. Peak
values are st red in a peak detect r and are additi nally sh wn with ne LED f r a sh rt peri d f time.
– Upperm st LED is red: This indicates a switched ff channel. T switch the channel back n, the c rresp nding channel
c ntr l butt n must be pressed f r at least 50ms. A further push switches the channel ff again.
– Upperm st LED is single flashing in red (2Hz): This indicates that a channel has switched ff due t t high current. A
restart can be d ne either by a butt n n the unit r by a c ntr l signal. Theref re, push the c rresp nding channel
c ntr l butt n f r l nger than 1s r apply a v ltage between 10 and 30Vdc (max. 6mA current c nsumpti n) f r l nger
than 1s t the reset input. The reset input is galvanically is lated fr m the rest f the device.
– Upperm st LED is d uble flashing in red: This indicates that a channel has switched ff because the t tal current f the
m dule exceeds 40A. In such cases, first the verl aded channels are switched ff, then channels 8 t 1 in descending
rder.
– Display f the settings f r tripping currents and tripping characteristic: Push the SET butt n f r m re than 50ms. First the
tripping currents are displayed, f ll wed by the tripping characteristic with the letter “F” (f r fast tripping) r “S” (f r
sl w tripping). This functi n ends aut matically after 5s.

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 9 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
Parameter Mode
The “A” scale n the right side f the LED Matrix is used in this m de, which is als indicated by the triangular LED bel w
the LED matrix display. In this m de the set values f r the tripping currents f r each individual channel are displayed and
the LED matrix display als sh ws if a channel has switched ff due t a t high current r n purp se.
– Displaying f the set current: The green LED sh ws the set current f the individual channel.
– Displaying f the tripping characteristic: Push the SET butt n. The selected characteristic is sh wn n the LED matrix f r
2 sec nds. Letter F indicates the fast and the letter S the sl w tripping characteristic.
– Red LEDs: These indicate a switched ff r verl aded channel and include the same LED blinking pattern and push-
butt n behavi r as in the measurement m de. If a channel is set t 12A, the LED bel w the upperm st LED will display
this switched- ff inf rmati n.
Changing of Trip Currents and Trip Characteristic
Fact ry settings are that all channels are turned n with a 1A setting in a fast tripping characteristic and in measurement
m de. Parameters can be changed in the measurement m de as well as in the parameter m de. Parameters can be changed
regardless f whether a channel is switched ff r n t.
– Changing the current settings: Press and h ld the SET butt n f r at least 1s. The triangular green "A" LED starts flashing.
After that, sh rtly tap the channel c ntr l butt n multiple times t adjust the current step by step. When the desired
setting is f und, press the SET butt ns f r m re than 50ms t save the setting. This m de ends aut matically 10 sec nds
after n m re butt ns are pushed. In case the settings are n t saved by pressing the SET butt n, changes f tripping
currents are n t st red.
– Changing f the tripping characteristic (sl w r fast): T change the characteristic f r all channels push the SET and the
channel c ntr l butt n 3 at the same time. The selected characteristic is sh wn n the LED matrix f r 2 sec nds and
st red aut matically. Letter “F” indicates the fast and “S” the sl w tripping characteristic.
Tripping currents and characteristic setting can be pr tected against changes with a PIN c de. T l ck the settings push the
SET and channel c ntr l butt n 1 until the unit sh ws a m ving text “PIN TO LOCK”. Enter a 4-digit PIN by pushing any
c mbinati n f channel c ntr l butt ns 1-8. Push the SET butt n t save the PIN, the unit sh ws a m ving text “LOCKED”.
T unl ck settings push the SET and channel c ntr l butt n 1, the unit sh ws a m ving text “PIN TO UNLOCK” and enter
the 4-digit PIN y u selected and c nfirm it by pushing the SET butt n.
F r LED pattern examples, please refer t Fig. 7.2 and Fig. 7.3.

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 10 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
LED pattern example
Fig. 7-2: LED Light pattern in measurement m de Fig. 7-3: LED Light pattern in parameter m de
Description:
Channel 1 is l aded with 40-60% f the set current
Channel 2 has tripped due t ver current
Channel 3 is turned ff n purp se (with push-butt n)
Channel 4 is l aded with 80-100% f the set current
Channel 5 is turned ff n purp se (with push-butt n)
Channel 6 is l aded with 40-60% f the set current current
Channel 7 is l aded with 0-10% f the set current current
Channel 8 has tripped due t ver current
Description:
Channel 1 is set t 12A but turned ff with push-butt n
Channel 2 is set t 4A but has tripped due t ver current
Channel 3 is set t 6A and utput is n
Channel 4 is set t 8A, but has tripped due t ver current
Channel 5 is set t 2A but turned ff with push-butt n
Channel 6 is set t 10A and utput is n
Channel 7 is set t 1A and utput is n
Channel 8 is set t 3A but has tripped due t ver current

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 11 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
8. Digital C ded Interface (PISA-B-812-B4)
The device is equipped with a “Digital C ded Alarm Signal” utput (pins 13 and 14), which pr vides inf rmati n ab ut
individual channel tripping. The signal is an pt -c upler-type utput which is l w hmic f r start bit and f r tripped
channels.
Thresh ld value f r start typ. 0.7V @ 1mA, 1.1V @ 5mA
Signal v ltage max. +35Vdc
Signal current max. 10mA
Is lati n v ltage see chapter 19
The signal sequence starts with 200ms start bit f ll wed by a 100ms gap and 100ms signal related t CH1 etc. The wh le
sequence is peri dically repeated every 1900ms.
Fig. 8-1: Digital C ded Alarm Signal – Signal Sequence
9. Alarm Relay C ntact (PISA-B-812-B1)
The device is equipped with an alarm c ntact. The n rmally cl sed (NC) c ntact cl ses as s n as ne utput channel has
switched ff (c mm n signalling) r the input v ltage is l wer than 19Vdc.
C ntact ratings max. 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive l ad
min. Permissible l ad: 1mA at 5Vdc
Is lati n v ltage see chapter 19
10. Reset Input
A restart f switched- ff channels can be d ne either by a butt n n the unit r by a c ntr l signal n the reset input
(pins 11-12). Theref re, push the c rresp nding channel c ntr l butt n f r l nger than 1s r apply a v ltage between 10
and 30Vdc f r l nger than 1s t the reset input. The reset input is galvanically is lated fr m the rest f the device.
Reset v ltage min. 10Vdc
max. 30Vdc
Reset delay min. 1s - apply the reset v ltage f r at least this time t restart switched- ff channels
Signal v ltage min. -35Vdc
max. +35Vdc
Signal current max. 6mA, current limited
Is lati n v ltage see chapter 19
11. Efficiency And P wer L sses
Efficiency typ. 98.9% At 8x 5A utput l ad
P wer l sses typ. 1W At n utput l ads
typ. 10.8W At 8x 5A utput l ad

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 12 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
12. Functi nal Diagram
Fig. 12-1: Functi nal diagram PISA-B-812-B1
Fig. 12-2: Functi nal diagram PISA-B-812-B4

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 13 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
13. Fr nt Side And User Elements
A Output terminals CH1 – CH8
A1: (+) P sitive utput p les
A2: (−) Negative (return) utput p les
B Input terminals
(+) P sitive input p le
(−) Negative (return) input p le
C Alarm signal (pin 13-14)
PISA-B-812-B1: Relay c ntact
PISA-B-812-B4: Digital c ded signal
D Signal input to restart switched-off channels (pin 11-12)
E Slot for interconnecting power-bus-bar for supply voltage
E1: Interc nnecti n f r p sitive input p wer-bus-bar
E2: Interc nnecti n f r negative (return) input p wer-bus-bar
F Set button required for controlling the unit
G Channel control buttons
H LED matrix display
I LED which indicates percentage values of the LED matrix
Fig. 13-1: Fr nt side
J LED which indicates ampere values of the LED matrix
14. Terminals And Wiring
The terminals are IP20 Finger safe c nstructed and suitable f r field- and fact ry wiring.
Input Terminals Output Terminals Signal Terminals
Type Push-in terminals Push-in terminals Push-in terminals
S lid wire
Stranded wire
Stranded wire with ferrules
American Wire Gauge
Max. 16mm2
Max. 16mm2
Max. 10mm2
AWG 20-4
Max. 2.5mm2
Max. 2.5mm2
Max. 1.5mm2
AWG 24-12
Max. 2.5mm2
Max. 2.5mm2
Max. 1.5mm2
AWG 24-12
Max. wire diameter (including
ferrules)
6.1mm 2.3mm 2.3mm
Wire stripping length 19mm / 0.75inch 10mm / 0.4inch 10mm / 0.4inch
Screwdriver 5mm sl tted t pen the
spring
3mm sl tted t pen the
spring
3mm sl tted t pen the
spring

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 14 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
15. Lifetime Expectancy
The Lifetime expectancy sh wn in the table indicates the minimum perating h urs (service life) and is determined by
the lifetime expectancy f the built-in electr lytic capacit rs. Lifetime expectancy is specified in perati nal h urs and is
calculated acc rding t the capacit r’s manufacturer specificati n.
Please note: The manufacturer f the electr lytic capacit rs nly guarantees a maximum life f up t 15 years (131 400h).
Any number exceeding this value is a calculated the retical lifetime which can be used t c mpare devices.
Lifetime expectancy t.b.d. At 24V, 8x5A and 40°C
t.b.d. At 24V, 8x2.5A and 40°C
t.b.d. At 24V, 8x5A and 25°C
t.b.d. At 24V, 8x2.5A and 25°C
16. MTBF
MTBF stands f r Mean Time Between Failure, which is calculated acc rding t statistical device failures, and indicates
reliability f a device. It is the statistical representati n f the likelih d f a unit t fail and d es n t necessarily represent
the life f a pr duct.
The MTBF figure is a statistical representati n f the likelih d f a device t fail. A MTBF figure f e.g. 1 000 000h means
that statistically ne unit will fail every 100 h urs if 10 000 units are installed in the field. H wever, it cann t be determined
if the failed unit has been running f r 50 000h r nly f r 100h.
F r these types f units the MTTF (Mean Time T Failure) value is the same value as the MTBF value.
MTBF SN 29500, IEC 61709 t.b.d. At 24V, 8x5A and 40°C
t.b.d. At 24V, 8x5A and 25°C
MTBF MIL HDBK 217F t.b.d. At 24V, 8x5A and 40°C; Gr und Benign GB40
t.b.d. At 24V, 8x5A and 25°C; Gr und Benign GB25
t.b.d. At 24V, 8x5A and 40°C; Gr und Fixed GF40
t.b.d. At 24V, 8x5A and 25°C; Gr und Fixed GF25

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 15 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
17. EMC
The EMC behavi r f the device is designed f r applicati ns in industrial envir nment as well as in residential, c mmercial
and light industry envir nment with ut any restricti ns.
The device c mplies with EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4.
The device c mplies with FCC Part 15 rules. Operati n is subjected t f ll wing tw c nditi ns: (1) this device may n t
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired perati n.
The chassis f the device is earthed thr ugh the DIN rail m unting c nnecti n t a gr unded metal plate.
EMC Immunity Power lines and housing
Electr static discharge EN 61000-4-2 C ntact discharge 8kV Criteri n A
Air discharge 8kV Criteri n A
Electr magnetic RF field EN 61000-4-3 80MHz - 6GHz 10V/m Criteri n A
Fast transients (Burst) EN 61000-4-4 Input lines 2kV Criteri n A
Output lines 2kV Criteri n A
Surge v ltage n input lines EN 61000-4-5 (+) → (−) 500V Criteri n B
(+) / (−) → h using 1kV Criteri n B
Surge v ltage n utput lines EN 61000-4-5 (+) → (−) 500V Criteri n B
(+) / (−) → h using 1kV Criteri n B
C nducted disturbance EN 61000-4-6 0.15 - 80MHz 10V Criteri n A
EMC Immunity Signals lines
Electr magnetic RF field EN 61000-4-3 80MHz - 6GHz 10V/m Criteri n A
Fast transients (Burst) EN 61000-4-4 With c upling clamp 2kV Criteri n A
Surge EN 61000-4-5 Signal → h using 1kV Criteri n A
C nducted disturbance EN 61000-4-6 0.15 - 80MHz 10V Criteri n A
Performance Criterions:
A: The device sh ws n rmal perati n behavi r within the defined limits.
B: The device perates c ntinu usly during and after the test. During the test min r temp rary impairments may ccur,
which will be c rrected by the device itself.
EMC Emission
C nducted emissi n IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Input lines Limits f r l cal DC p wer
netw rks fulfilled.
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Output lines Limits f r l cal DC p wer
netw rks fulfilled.
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Signal lines Limits f r wired netw rk p rts
fulfilled.
Radiated emissi n EN 55011, EN 55032, CISPR 11, CISPR 32 Class B
Switching Frequencies
Micr c ntr ller 8MHz Fixed frequency
Internal c mmunicati n bus 400kHz Fixed frequency
Internal auxiliary v ltage 100kHz Fixed frequency

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 16 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
18. Envir nment
Operati nal temperature -25°C t +70°C (-13°F t 158°F) The perati nal temperature is the ambient r
surr unding temperature and is defined as the
air temperature 2cm bel w the device.
St rage temperature -40°C t +85°C (-40°F t 185°F) F r st rage and transp rtati n
Output derating 1A/°C Between +60°C and +70°C (140°F t 158°F), see
Fig. 18-1
2.5A/1000m r 5°C/1000m F r altitudes >2000m (6560ft), see Fig. 18-2
The derating is n t hardware c ntr lled. The user has t take this int c nsiderati n t
stay bel w the derated current limits in rder n t t verl ad the unit.
Humidity 5 t 95% r.h. Acc rding t IEC 60068-2-30
Atm spheric pressure 110-54kPa See Fig. 18-2 f r details
Altitude Up t 5000m (16 400ft) See Fig. 18-2 f r details
Over-v ltage categ ry N/A
Impulse withstand v ltages 1.5kV Between input and chassis (acc rding t IEC
60664-1 ver-v ltage categ ry II)
Degree f p lluti n 2 Acc rding t IEC 60664-1, n t c nductive
Vibrati n sinus idal 2-17.8Hz: ±1.6mm;
17.8-500Hz: 2g
2 h urs / axis
Acc rding t IEC 60068-2-6
Sh ck 30g 6ms, 20g 11ms
3 bumps per directi n,
18 bumps in t tal
Acc rding t IEC 60068-2-27
Sh ck and vibrati n is tested in c mbinati n with DIN rails acc rding t EN 60715 with
a height f 15mm and a thickness f 1.3mm.
Fig. 18-1: Output current vs. ambient temp. Fig. 18-2: Output current vs. altitude

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 17 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
19. Safety Features And Pr tecti n Features
Is lati n resistance >10MOhm At delivered c nditi n between p wer p rt and
signals, measured with 500Vdc
>10MOhm At delivered c nditi n between p wer p rt and
h using, measured with 500Vdc
>10MOhm At delivered c nditi n between signals and h using,
measured with 500Vdc
Output ver-v ltage pr tecti n max. 500Vac P wer p rt t signal p rt
max. 500Vac P wer p rt / signal p rt t h using
Class f pr tecti n III A PE (Pr tective Earth) c nnecti n is n t required
Degree f pr tecti n IP20 Acc rding t EN/IEC 60529
Over-temperature pr tecti n N t included
Internal input fuse N t included
Internal utput fuses N t included
Input ver-v ltage pr tecti n max. 31.4Vdc N harm r defect f the unit
Reverse input p larity pr tecti n N t included Make sure that the input v ltage p larity is c rrect
bef re applying the input v ltage.
T uch current (leakage current) The leakage current which is pr duced by the m dule itself depends n the
input v ltage ripple and need t be investigated in the final applicati n.
F r a sm th DC input v ltage, the pr duced leakage current is less than
100μA.

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 18 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
20. Appr vals And Fulfilled Standards
IEC 61010 CB Scheme Certificate
IEC 61010-2-201 - Electrical Equipment f r Measurement, C ntr l and
Lab rat ry Use - Particular requirements f r c ntr l equipment
IEC 62368
planned
CB Scheme Certificate
IEC 62368-1 - Audi /vide , inf rmati n and c mmunicati n
techn l gy equipment - Safety requirements
Output safety level: ES1
UL 61010 UL Certificate
Listed equipment f r categ ry NMTR - UL 61010-2-201 - Electrical
equipment f r measurement, c ntr l and lab rat ry use - Particular
requirements f r c ntr l equipment
Applicable f r US and Canada
E-File: E198865
UL 2367 UL Certificate
Rec gnized c mp nent f r categ ry QVRQ - UL 2367 Standard f r
S lid State Overcurrent Pr tect rs
Applicable f r US
E-File: E342020
VDMA 24364 Paint Wetting Impairment Substances Test ( r LABS-Test)
Tested f r Z ne 2 and Test Class C1 acc rding t VDMA 24364-C1-L/W
f r s lvents and water-based paints
21. Regulat ry C mpliance
EU Declarati n f
C nf rmity
The CE mark indicates c nf rmance with the Eur pean
– EMC directive
– R HS directive
REACH Directive Manufacturer's Statement
EU-Regulati n regarding the Registrati n, Evaluati n, Auth rizati n
and Restricti n f Chemicals
WEEE Directive Manufacturer's Statement
EU-Regulati n n Waste Electrical and Electr nic Equipment
Registered in Germany as business t business (B2B) pr ducts.
R HS (China R HS 2) Manufacturer's Statement
Administrative Measures f r the Restricti n f the Use f Hazard us
Substances in Electrical and Electr nic Pr ducts 25 years

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 19 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
22. Physical Dimensi ns And Weight
Width 52mm / 2.05''
Height 124mm / 4.88''
Depth 130mm / 5.12''
The DIN rail height must be added t the unit depth t calculate the t tal required
installati n depth.
Weight 370g / 0.82lb
DIN rail Use 35mm DIN rails acc rding t EN 60715 r EN 50022 with a height f 7.5 r 15mm.
H using material B dy: Aluminium all y
C ver: High-grade p lycarb nate material
Installati n clearances See chapter 2.
Penetrati n pr tecti n Small parts like screws, nuts, etc. with a diameter larger than 3.6mm
All dimensi ns in mm unless therwise n ted.
Fig. 22-1: Fr nt view Fig. 22-2: Side view

PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulsp wer.c m 20 / 20
All parameters are specified at 24Vdc input v ltage, 8x5A utput currents, 25°C ambient and after a 5 minutes run-in time unless therwise n ted.
23. Access ries
23.1. POWER CONNECTION - POWER-BUS-BARS
These p wer-bus-bars are used t c nnect several PISA-B m dules electrically t gether. The p wer-bus-bars distribute the
24V supply v ltage f the PISA-B m dules.
The length f 102mm is suitable t c nnect tw PISA-B m dules t gether. The length f 155mm is suitable t c nnect
three PISA-B m dules t gether. If m re than three m dules need t be c nnected t an ther, appr priate pieces can be
cut fr m the 500mm l ng rail.
The supply f the 24V is then nly d ne by ne fuse m dule, preferably in the middle, because the current is then better
distributed in b th directi ns and the permissible current f the p wer-bus-bars f 32A is n t exceeded.
Fuse m dules can be lined up n the DIN rail with ut spacing. The p wer-bus-bars can be plugged in fr m the fr nt f the
PISA-B m dules and must have a length that all plug c ntacts f the m dules make a c ntact.
Order number BUS-BAR1-L1 2 BUS-BAR1-L155 BUS-BAR1-L5
Order number c ntains 2 pcs. (f r + and - p le) 2 pcs. (f r + and - p le) 1 pc.
C l ur Grey Grey Grey
Size (l x w x h) 1 2 x 3.3 x 11.4mm
(4.02 x 0.13 x 0.45’’)
155 x 3.3 x 11.4mm
(6.1 x 0.13 x 0.45’’)
5 x 3.3 x 11.4mm
(19.7 x 0.13 x 0.45’’)
Weight 9g (0.02lb) per pc. 13g (0.03lb) per pc. 43g (0.1lb)
Suitable f r 2x PISA-B m dules 3x PISA-B m dules Up t 8x PISA-B m dules
(2 pcs. needed)
Max. current 32A 32A 32A
Fig. 23-1: Mechanical dimensi ns Fig. 23-2: M unting example