Puls DIMENSION PISA-B-8CL2-B1 User manual

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 1 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
ELECTRONIC FUSE
8X 24V, NEC CLASS 2
•Eight Current Controlled Out uts
•NEC Class 2 Com liant
•Ada tive Voltage-de endent Current Limitation for
Maximal Out ut Power According to NEC Class 2
•Selective Tri ing of Overloaded Channels
•Com atible even with large Ca acitive Loads
•Out ut Currents Dis layed Live on LED Matrix
•Remote Reset or Reset via Pushbuttons
•Common Signaling Relay Contact for Tri ed
Channels (PISA-B-8CL2-B1)
•Digital Coded Signal Out ut for Tri ed Channels
(PISA-B-8CL2-B4)
•Parameter Settings can be Locked by PIN-Code
•ON/OFF Feature for Each Individual Out ut
•Easy Wiring - Distribution Terminals for Negative Pole
•3 Year Warranty
GENERAL DESCRIPTION SHORT-FORM DATA
The PISA-B devices are DIN rail mountable
eight channel rotection modules with integrated
electronic fuses for 24V systems. They distribute the
current from one large ower source to eight NEC
Class 2 out ut circuits, which results in reduced fire
safety efforts and easier regulatory testing as well as
a roval rocesses for the end equi ment.
Channel 1 and 2 are o timized for loads with large
in ut ca acitances. Connect such loads to these
channels to avoid false tri ing or unex ected switch-
off such loads.
The PISA-B-8CL2-B1 is equi ed with a common
tri ing signaling relay contact that re orts tri ed
channels, while the PISA-B-8CL2-B4 has a digital coded
signal out ut built in for this function.
All PISA-B devices are equi ed with ush-in
terminals, which are o timized for automated wiring.
The mechanically robust housing is made of a high-
grade, reinforced molded material on the front and
of an aluminum body, which ermits surrounding
tem eratures u to +70°C.
In ut voltage DC 24V -20%/+25%
Required in ut voltage
for turning-on of out uts
19.6Vdc
In ut current 40A
Internal consum tion 40mA PISA-B-8CL2-B1
35mA PISA-B-8CL2-B4
Nominal out ut current 3.75A Per channel
Current limitation 5.7A CH1 and CH2
50A CH3 to CH8
Tri ing characteristics Slow or Fast Selectable
Tri ing delay
CH1-CH2 2ms – 1.1s At short circuit
CH3-CH8 <10ms At short circuit
CH1-CH8 1.1s For slow tri ing at 1.5x
nominal current
CH1-CH8 0.22s For fast tri ing at 1.5x
nominal current
Max load ca acitance ca ability
CH1-CH2 100mF Per channel
CH3-CH8 20mF Per channel
Voltage dro er channel
CH1-CH2 45mV For 3.75A load
CH3-CH8 60mV For 3.75A load
Standby losses 1W
Power losses 7W At 8x 3.75A load
Tem erature range -25°C to 70°C
Size (w x h x d) 52x124x130mm Without DIN rail
Weight 370g / 0.82lb
ORDER NUMBERS MAIN APPROVALS
Description: Electronic Fuse PISA-B-8CL2-Bx-xx
Order Number:
PISA-B-8CL2-B1 Common signaling relay contact
PISA-B-8CL2-B4 Digital coded signal out ut
Accessories:
BUS-BA 1-L102: A set for 2 modules
BUS-BA 1-L155: A set for 3 modules
BUS-BA 1-L500: Single iece L=500mm
For details and a com lete a roval list, see cha ter 20.
UL 2367 UL 61010-2-201 IEC 61010
IEC 62368 lanned

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 2 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
Index
1 Intended Use....................................................... 3
2 Installation Instructions...................................... 3
3 Ty ical Wiring Scheme....................................... 4
4 DC-In ut.............................................................. 5
5 Out ut................................................................. 5
6 Out ut Tri ing Characterstics......................... 7
7 Control and Monitoring Features..................... 8
8 Digital Coded Interface (PISA-B-8CL2-B4)......... 9
9 Alarm Relay Contact (PISA-B-8CL2-B1).............. 10
10 Reset In ut.......................................................... 10
11 Efficiency and Power Losses.............................. 10
12 Functional Diagram............................................ 11
13 Front Side And User Elements........................... 12
14 Terminals And Wiring........................................ 12
15 Lifetime Ex ectancy........................................... 13
16 MTBF.................................................................... 13
17 EMC..................................................................... 14
18 Environment....................................................... 15
19 Safety Features and Protection Features.......... 16
20 A rovals and Fulfilled Standards.................... 17
21 Regulatory Com liance...................................... 17
22 Physical Dimensions And Weight...................... 18
23 Accessories.......................................................... 19
23.1 Power Connection - Power-Bus-Bars...... 19
The information given in this document is correct to the best of our knowledge and ex erience at the time of ublication.
If not ex ressly agreed otherwise, this information does not re resent a warranty in the legal sense of the word. As the
state of our knowledge and ex erience is constantly changing, the information in this data sheet is subject to revision. We
therefore kindly ask you to always use the latest issue of this document (available under www. uls ower.com).
No art of this document may be re roduced or utilized in any form without our rior ermission in writing.
Packaging and ackaging aids can and should always be recycled. The roduct itself may not be dis osed of as domestic
refuse.
TERMINOLOGY AND ABBREVIATIONS
NEC Class 2 NEC Class 2 ower sources rovide limited out ut ower of less than 100 VA and out ut
current of less than 8 A. They are considered safe in terms of fire ignition and rovide
acce table rotection against electric shock. The benefits of using NEC Class 2 circuits are
reduced and less costly requirements for wiring and fire rotection. In addition, the end-use
regulatory testing and a roval rocess is sim ler.
DC 24V A figure dis layed with the AC or DC before the value re resents a nominal voltage with
standard tolerances (usually ±15%) included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)
24Vdc A figure with the unit (Vdc) at the end is a momentary figure without any additional
tolerances included.
may A key word indicating flexibility of choice with no im lied reference.
shall A key word indicating a mandatory requirement.
should A key word indicating flexibility of choice with a strongly referred im lementation.

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 3 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
1. Intended Use
This device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control,
rocess control, monitoring and measurement equi ment or the like.
Do not use this device in equi ment, where malfunctioning may cause severe ersonal injury or threaten human life without
additional a ro riate safety devices, that are suited for the end-a lication.
If this device is used in a manner outside of its s ecification, the rotection rovided by the device may be im aired.
2. Installation Instructions
DANGER isk of electrical shock, fire, personal injury or death.
– Turn ower off before working on the device. Protect against inadvertent re- owering.
– Do not o en, modify or re air the device.
– Use caution to revent any foreign objects from entering the housing.
– Do not use in wet locations or in areas where moisture or condensation can be ex ected.
– Do not touch during ower-on, and immediately after ower-off. Hot surfaces may cause burns.
Obey the following installation instructions:
This device may only be installed and ut into o eration by qualified ersonnel. This device does not contain serviceable
arts. If damage or malfunction should occur during installation or o eration, immediately turn ower off and send unit
to the factory for ins ection.
Install the device in an enclosure roviding rotection against electrical, mechanical and fire hazards. Install the device
onto a DIN rail according to EN 60715 with the in ut terminals on to of the unit.
U to eight devices can be connected via two ower-bus-bars, where only one device is connected to the ower su ly.
The ower-bus-bars must be long enough to make a connection to all contacts of the devices.
Use an a ro riately sized 24V ower su ly, which can deliver the eak current required to tri the load channels. If
eak currents are too low, the su ly voltage for the rotection module can no longer be maintained, which results in a
malfunctioning of the rotection module.
Make sure that the wiring is correct by following all local and national codes. Use a ro riate co er cables that
are designed for a minimum o erating tem erature of 60°C for ambient tem eratures u to +45°C, 75°C for ambient
tem eratures u to +60°C and 90°C for ambient tem eratures u to +70°C. Ensure that all strands of a stranded wire enter
the terminal connection.
The device is designed for ollution degree 2 areas in controlled environments. No condensation or frost is allowed. The
enclosure of the device rovides a degree of ingress rotection of IP20. The housing does not rovide rotection against
s illed liquids.
The isolation of the devices is designed to withstand im ulse voltages u to 1.5kV according to IEC 60664-1.
The in ut can be owered from a regulated ower su ly or a similar DC source.
The in ut must be owered from a PELV or SELV source in order to maintain a SELV or PELV out ut. Check for correct in ut
olarity. The device will not o erate when the voltage is reversed.
A disconnecting means shall be rovided for the in ut of the device.
The device is designed as “Class of Protection III” equi ment according to IEC 61140.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do not
cover ventilation grid!
Kee the following minimum installation clearances: 40mm on to , 20mm on the bottom, 5mm left and right side. Increase
the 5mm to 15mm in case the adjacent device is a heat source. Between multi le PISA-B modules, no clearance is needed.
The device is designed for altitudes u to 5000m (16 400ft).
The maximum surrounding air tem erature is +70°C (+158°F). The o erational tem erature is the same as the ambient or
surrounding air tem erature and is defined 2cm below the device. The device is designed to o erate in areas between 5%
and 95% relative humidity.

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 4 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
3. Ty ical Wiring Scheme
One fuse module is suitable to distribute the current to 8 consumers. If there are more than eight consumers, u to eight
fuse modules can be used (64 consumers). The su ly of the individual fuse modules can be done by means of ower-bus-
bars, which are available as accessory arts. The su ly of the 24V is then only done by one fuse module, referably in
the middle, because the current is then better distributed in both directions and the ermissible current of the ower-bus-
bar of 32A is not exceeded.
Fuse modules can be lined u on the DIN rail without s acing. The ower-bus-bars can be lugged in from the front and
must have a length that all lug contacts of the modules make a contact.
The (+) ole terminals of the loads must be connected to the out uts of the fuse module. The fuse module also has a
distribution for the (-) ole connection. This internal distribution can be used and reduces the wiring effort. However, an
external distribution of the (-) ole connection may also be used, as shown in Fig. 3-2.
The channel 1 and 2 are o timized for loads with large in ut ca acitances. Connect such loads to these channels to avoid
a false tri ing or unex ected switch-off of these channels.
Fig. 3-1: Ty ical wiring scheme for one fuse module (8 loads) Fig. 3-2: Ty ical wiring scheme utilizing an external
distribution terminal for the negative ole
Fig. 3-3: Ty ical wiring scheme for multi le modules

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 5 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
4. DC-In ut
The in ut can be owered from a regulated ower su ly or a similar DC source. Use an a ro riately sized ower su ly,
which can deliver the required out ut current.
If a ower su ly with a continuous out ut current greater than 50A is used, a fuse or circuit breaker with 63A (B- or C-
Characteristic) must be connected between the ower su ly and the electronic fuse module.
The continuous voltage between the in ut and ground must not exceed 60Vdc.
The in ut must be owered from a PELV or SELV source or an “Isolated Secondary Circuit” in order to maintain SELV or
PELV out uts.
Check for correct in ut olarity. The device will not o erate when the voltage is reversed.
In ut voltage nom. DC 24V -20%/+25%
In ut voltage range 19.2-30Vdc
ty . 19VdcIn ut voltage required to
switch on the out uts max. 19.6Vdc
In ut current max. 40A For multi le modules connected via ower-bus-bar
max. 30A For a single module at fully loaded out uts
Stand-by current with no load current on the out utsInternal current
consum tion ty . 40mA For PISA-B-8CL2-B1
ty . 35mA For PISA-B-8CL2-B4
5. Out ut
The out ut can su ly any kind of loads, including inductive and ca acitive loads. The maximum size of ca acitive loads is
s ecified in the table below (see Tab. 5-1). Larger load ca acitors might result in an unintended turn-off of the channel.
More detailed information regarding allowable ca acitive loads is available on request. If in doubt or when you do not
know the in ut ca acitance of your load, we recommend to erform tests with the real load.
The out uts of each channel fulfil the requirements for a limited ower source acc. to NEC Class 2.
Out ut channels can be switched on and off se arately by ushing the corres onding control button for longer than 50ms.
A switched off channel is dis layed with the u ermost red LED of the LED bar gra h. Factory setting is that all channels
are switched on.
Channels 1 and 2 have a current limited out ut, while channels 3 to 8 have an overcurrent shutdown behaviour only.
– Do not a ly reverse voltages from the load to the out ut terminals that are higher than 30V and last longer than 1s.
– Do not arallel out uts for higher out ut currents.
– Do not connect out uts in a series connection for higher out ut voltages.
– Do not connect batteries for charging ur oses to the out ut of the device.
In order to avoid too high eak currents on the 24V su ly when a lying the 24V su ly voltage, the out ut channels are
switched on in delayed ste s. Channel 1 switches on after 50ms followed by the remaining channels with a delay of 100ms
each. This scheme a lies when all channels are switched on. Channels that are switched off are ski ed.
Fig. 5-1: Turn-On sequence after a lying an in ut voltage

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PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 6 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
Out ut voltage nom. DC 24V The out ut voltage is equal to the in ut voltage
minus the voltage dro of the module.
Out ut current nom. 3.75A +/-100mA, at 24V er channel
nom. 3A +/-100mA, at 30V er channel
Ada tive voltage-de endent current limitation for maximal out ut current
according to NEC Class 2 requirements.
Voltage dro er channel ty . 45mV For CH1 or CH2 at 3.75A load when all other
channels are not loaded
ty . 120mV For CH1 or CH2 when all channels are loaded with
3.75A
ty . 60mV For CH3 to CH8 at 3.75A load when all other
channels are not loaded
ty . 135mV For CH3 to CH8 when all channels are loaded with
3.75A
ty . 5.7A For CH1 and CH2Current limitation
ty . 50A For CH3 to CH8
Channels 1 and 2 have a current limited out ut, while channels 3 to 8 have
an overcurrent shutdown behaviour only.
Load ca acitance ca ability max. 100mF For CH1 and CH2 er channel
max. 20mF For CH3 to CH8 er channel
Out ut leakage current max. 2mA Per channel, when CH1 and CH2 are switched off
ty . 1.2mA Per channel, when CH1 and CH2 are switched off
max. 50μA Per channel, when CH3 to CH8 are switched off
Turn-on delay of out uts ty . 750ms Period between a lying the in ut voltage and
turning on all out ut channels.
Tab. 5-1: Out ut data
Fig. 5-2: Out ut Current vs. In ut Voltage

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PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 7 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
6. Out ut Tri ing Characterstics
The tri ing characteristic can be set to Slow or Fast as a common arameter for all channels.
Tri ing characteristic Slow / Fast selectable, factory setting is Fast
Tri ing delay ty . 1.1s For all channels in Slow mode at 1.5x nominal current
ty . 0.22s For all channels in Fast mode at 1.5x nominal current
ty . 2ms – 1.1s For CH1 and CH2 in short circuit
max. 10ms For CH3 to CH8 in short circuit
The following curves show the let-through current areas, which are located to the left of the curves, and the tri ing areas,
which are located to the right of the curves.
Fig. 6-1: CH1 and CH2 tri ing diagrams in Slow mode Fig. 6-2: CH1 and CH2 tri ing diagrams in Fast mode
Fig. 6-3: CH3 to CH8 tri ing diagrams in Slow mode Fig. 6-4: CH3 to CH8 tri ing diagrams in Fast mode

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 8 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
7. Control And Monitoring Features
The LED matrix dis lay rovides information about the actual current values (average and eak) of the individual out ut
channels, re orts faults and hel s to arameterise the device. The green and yellow LEDs indicate the actual channel current
in ercent of the nominal value. Peak values are stored in a eak detector and are additionally shown with one LED for a
short eriod of time. Red LEDs (regardless of whether they are flashing or solid on) indicate that the out ut is switched off.
The tri ing characteristic can be set as a common arameter for all channels. To change the characteristic alternately
ush the SET and channel control button for channel 3 at the same time. The selected o tion is shown on the LED matrix
for 2 seconds. Letter F indicates the fast and the letter S the slow tri ing characteristic. If only the SET button is ressed,
the characteristic is dis layed for 2s. Tri ing characteristic can be changed regardless of whether a channel is switched
off or not.
Tri ing characteristic setting can be rotected against changes with a PIN code. To lock the settings ush the SET and
channel control button 1 until the unit shows a moving text “PIN TO LOCK”. Enter a 4-digit PIN by ushing any combination
of channel control buttons 1-8. Push the SET button to save the PIN, the unit shows a moving text “LOCKED”. To unlock
settings ush the SET and channel control button 1, the unit shows a moving text “PIN TO UNLOCK” and enter the 4-digit
PIN you selected and confirm it by ushing the SET button.
Fig. 7-1: Control and monitoring elements
Special Key Combinations
S ecial shortcuts allow quick access to certain information:
Press SET + CCB1 button: Lock/Unlock setting with PIN
Press SET + CCB2 button: Show FW version
Press SET + CCB3 button: Slow/Fast mode

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 9 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
Fig. 7-2: LED attern exam le
Description:
Channel 1 is loaded with 40-60% of the nominal current
Channel 2 has tri ed due to over current
Channel 3 is turned off on ur ose (with ush-button)
Channel 4 is loaded with 80-100% of the nominal current
Channel 5 is turned off on ur ose (with ush-button)
Channel 6 is loaded with 40-60% of the nominal current
Channel 7 is loaded with 0-10% of the nominal current
Channel 8 has tri ed due to over current
8. Digital Coded Interface (PISA-B-8CL2-B4)
The device is equi ed with a “Digital Coded Alarm Signal” out ut ( ins 13 and 14), which rovides information about
individual channel tri ing. The signal is an o to-cou ler-ty e out ut which is low ohmic for start bit and for tri ed
channels.
Threshold value for start ty . 0.7V @ 1mA, 1.1V @ 5mA
Signal voltage max. +35Vdc
Signal current max. 10mA
Isolation voltage see cha ter 19
The signal sequence starts with 200ms start bit followed by a 100ms ga and 100ms signal related to CH1 etc. The whole
sequence is eriodically re eated every 1900ms.
Fig. 8-1: Digital Coded Alarm Signal – Signal Sequence

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PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 10 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
9. Alarm Relay Contact (PISA-B-8CL2-B1)
The device is equi ed with an alarm contact. The normally closed (NC) contact closes as soon as one out ut channel has
switched off (common signalling) or the in ut voltage is lower than 19Vdc.
Contact ratings max. 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
min. Permissible load: 1mA at 5Vdc
Isolation voltage see cha ter 19
10. Reset In ut
A restart of switched-off channels can be done either by a button on the unit or by a control signal on the reset in ut
( ins 11-12). Therefore, ush the corres onding channel control button for longer than 1s or a ly a voltage between 10
and 30Vdc for longer than 1s to the reset in ut. The reset in ut is galvanically isolated from the rest of the device.
Reset voltage min. 10Vdc
max. 30Vdc
Reset delay min. 1s - a ly the reset voltage for at least this time to restart switched-off channels
Signal voltage min. -35Vdc
max. +35Vdc
Signal current max. 6mA, current limited
Isolation voltage see cha ter 19
11. Efficiency And Power Losses
Efficiency ty . 99% At 8x 3.75A out ut load
Power losses ty . 1W At no out ut loads
ty . 7W At 8x 3.75A out ut load

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 11 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
12. Functional Diagram
Fig. 12-1: Functional diagram PISA-B-8CL2-B1
Fig. 12-2: Functional diagram PISA-B-8CL2-B4

PISA-B-8CL2-B1
PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 12 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
13. Front Side And User Elements
A Output terminals CH1 – CH8
A1: (+) Positive out ut oles
A2: (−) Negative (return) out ut oles
B Input terminals
(+) Positive in ut ole
(−) Negative (return) in ut ole
C Alarm signal ( in 13-14)
PISA-B-8CL2-B1: Relay contact
PISA-B-8CL2-B4: Digital coded signal
D Signal input to restart switched-off channels ( in 11-12)
E Slot for interconnecting power-bus-bar for supply voltage
E1: Interconnection for ositive in ut ower-bus-bar
E2: Interconnection for negative (return) in ut ower-bus-bar
F Set button required for controlling the unit
G Channel control buttons
Fig. 13-1: Front side
H LED matrix display
14. Terminals And Wiring
The terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.
Input Terminals Output Terminals Signal Terminals
Ty e Push-in terminals Push-in terminals Push-in terminals
Solid 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 stri ing length 19mm / 0.75inch 10mm / 0.4inch 10mm / 0.4inch
Screwdriver 5mm slotted to o en the
s ring
3mm slotted to o en the
s ring
3mm slotted to o en the
s ring

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PISA-B-8CL2-B4
A r. 2021 / Rev. 0.1 DS-PISA-B-8CL2-Bx-xx-EN www. uls ower.com 13 / 19
All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
15. Lifetime Ex ectancy
The Lifetime ex ectancy shown in the table indicates the minimum o erating hours (service life) and is determined by
the lifetime ex ectancy of the built-in electrolytic ca acitors. Lifetime ex ectancy is s ecified in o erational hours and is
calculated according to the ca acitor’s manufacturer s ecification.
Please note: The manufacturer of the electrolytic ca acitors only guarantees a maximum life of u to 15 years (131 400h).
Any number exceeding this value is a calculated theoretical lifetime which can be used to com are devices.
Lifetime ex ectancy t.b.d. At 24V, 8x3.75A and 40°C
t.b.d. At 24V, 8x1.88A and 40°C
t.b.d. At 24V, 8x3.75A and 25°C
t.b.d. At 24V, 8x1.88A and 25°C
16. MTBF
MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicates
reliability of a device. It is the statistical re resentation of the likelihood of a unit to fail and does not necessarily re resent
the life of a roduct.
The MTBF figure is a statistical re resentation of the likelihood of a device to fail. A MTBF figure of e.g. 1 000 000h means
that statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it cannot be determined
if the failed unit has been running for 50 000h or only for 100h.
For these ty es of units the MTTF (Mean Time To Failure) value is the same value as the MTBF value.
MTBF SN 29500, IEC 61709 t.b.d. At 24V, 8x3.75A and 40°C
t.b.d. At 24V, 8x3.75A and 25°C
MTBF MIL HDBK 217F t.b.d. At 24V, 8x3.75A and 40°C; Ground Benign GB40
t.b.d. At 24V, 8x3.75A and 25°C; Ground Benign GB25
t.b.d. At 24V, 8x3.75A and 40°C; Ground Fixed GF40
t.b.d. At 24V, 8x3.75A and 25°C; Ground Fixed GF25

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All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
17. EMC
The EMC behavior of the device is designed for a lications in industrial environment as well as in residential, commercial
and light industry environment without any restrictions.
The device com lies with EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4.
The device com lies with FCC Part 15 rules. O eration is subjected to following two conditions: (1) this device may not
cause harmful interference, and (2) this device must acce t any interference received, including interference that may cause
undesired o eration.
The chassis of the device is earthed through the DIN rail mounting connection to a grounded metal late.
EMC Immunity Power lines and housing
Electrostatic discharge EN 61000-4-2 Contact discharge 8kV Criterion A
Air discharge 8kV Criterion A
Electromagnetic RF field EN 61000-4-3 80MHz - 6GHz 10V/m Criterion A
Fast transients (Burst) EN 61000-4-4 In ut lines 2kV Criterion A
Out ut lines 2kV Criterion A
Surge voltage on in ut lines EN 61000-4-5 (+) → (−) 500V Criterion B
(+) / (−) → housing 1kV Criterion B
Surge voltage on out ut lines EN 61000-4-5 (+) → (−) 500V Criterion B
(+) / (−) → housing 1kV Criterion B
Conducted disturbance EN 61000-4-6 0.15 - 80MHz 10V Criterion A
EMC Immunity Signals lines
Electromagnetic RF field EN 61000-4-3 80MHz - 6GHz 10V/m Criterion A
Fast transients (Burst) EN 61000-4-4 With cou ling clam 2kV Criterion A
Surge EN 61000-4-5 Signal → housing 1kV Criterion A
Conducted disturbance EN 61000-4-6 0.15 - 80MHz 10V Criterion A
Performance Criterions:
A: The device shows normal o eration behavior within the defined limits.
B: The device o erates continuously during and after the test. During the test minor tem orary im airments may occur,
which will be corrected by the device itself.
EMC Emission
Conducted emission IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 In ut lines Limits for local DC ower
networks fulfilled.
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Out ut lines Limits for local DC ower
networks fulfilled.
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Signal lines Limits for wired network orts
fulfilled.
Radiated emission EN 55011, EN 55032, CISPR 11, CISPR 32 Class B
Switching Frequencies
Microcontroller 8MHz Fixed frequency
Internal communication bus 400kHz Fixed frequency
Internal auxiliary voltage 100kHz Fixed frequency

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All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
18. Environment
O erational tem erature -25°C to +70°C (-13°F to 158°F) The o erational tem erature is the ambient or
surrounding tem erature and is defined as the
air tem erature 2cm below the device.
Storage tem erature -40°C to +85°C (-40°F to 185°F) For storage and trans ortation
Out ut derating not a licable
Humidity 5 to 95% r.h. According to IEC 60068-2-30
Atmos heric ressure 110-54kPa See Fig. 18-2 for details
Altitude U to 5000m (16 400ft) See Fig. 18-2 for details
Over-voltage category N/A
Im ulse withstand voltages 1.5kV Between in ut and chassis (according to IEC
60664-1 over-voltage category II)
Degree of ollution 2 According to IEC 60664-1, not conductive
Vibration sinusoidal 2-17.8Hz: ±1.6mm;
17.8-500Hz: 2g
2 hours / axis
According to IEC 60068-2-6
Shock 30g 6ms, 20g 11ms
3 bum s er direction,
18 bum s in total
According to IEC 60068-2-27
Shock and vibration is tested in combination with DIN rails according to EN 60715 with
a height of 15mm and a thickness of 1.3mm.
Fig. 18-1: Out ut current vs. ambient tem . Fig. 18-2: Out ut current vs. altitude

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All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
19. Safety Features And Protection Features
Isolation resistance >10MOhm At delivered condition between ower ort and
signals, measured with 500Vdc
>10MOhm At delivered condition between ower ort and
housing, measured with 500Vdc
>10MOhm At delivered condition between signals and housing,
measured with 500Vdc
Out ut over-voltage rotection max. 500Vac Power ort to signal ort
max. 500Vac Power ort / signal ort to housing
Class of rotection III A PE (Protective Earth) connection is not required
Degree of rotection IP20 According to EN/IEC 60529
Over-tem erature rotection Not included
Internal in ut fuse Not included
Internal out ut fuses Not included
In ut over-voltage rotection max. 31.4Vdc No harm or defect of the unit
Reverse in ut olarity rotection Not included Make sure that the in ut voltage olarity is correct
before a lying the in ut voltage.
Touch current (leakage current) The leakage current which is roduced by the module itself de ends on the
in ut voltage ri le and need to be investigated in the final a lication.
For a smooth DC in ut voltage, the roduced leakage current is less than
100μA.

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All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
20. A rovals And Fulfilled Standards
IEC 61010 CB Scheme Certificate
IEC 61010-2-201 - Electrical Equi ment for Measurement, Control and
Laboratory Use - Particular requirements for control equi ment
IEC 62368
lanned
CB Scheme Certificate
IEC 62368-1 - Audio/video, information and communication
technology equi ment - Safety requirements
Out ut safety level: ES1
NEC Class 2 UL Certificate
Limited Power Source
Listed in the UL 61010-2-201 a roval re ort, investigated according
to UL 1310
UL 61010 UL Certificate
Listed equi ment for category NMTR - UL 61010-2-201 - Electrical
equi ment for measurement, control and laboratory use - Particular
requirements for control equi ment
A licable for US and Canada
E-File: E198865
UL 2367 UL Certificate
Recognized com onent for category QVRQ - UL 2367 Standard for
Solid State Overcurrent Protectors
A licable for US
E-File: E342020
VDMA 24364 Paint Wetting Im airment Substances Test (or LABS-Test)
Tested for Zone 2 and Test Class C1 according to VDMA 24364-C1-L/W
for solvents and water-based aints
21. Regulatory Com liance
EU Declaration of
Conformity
The CE mark indicates conformance with the Euro ean
– EMC directive
– RoHS directive
REACH Directive Manufacturer's Statement
EU-Regulation regarding the Registration, Evaluation, Authorization
and Restriction of Chemicals
WEEE Directive Manufacturer's Statement
EU-Regulation on Waste Electrical and Electronic Equi ment
Registered in Germany as business to business (B2B) roducts.
RoHS (China RoHS 2) Manufacturer's Statement
Administrative Measures for the Restriction of the Use of Hazardous
Substances in Electrical and Electronic Products 25 years

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All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
22. Physical Dimensions And Weight
Width 52mm / 2.05''
Height 124mm / 4.88''
De th 130mm / 5.12''
The DIN rail height must be added to the unit de th to calculate the total required
installation de th.
Weight 370g / 0.82lb
DIN rail Use 35mm DIN rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.
Housing material Body: Aluminium alloy
Cover: High-grade olycarbonate material
Installation clearances See cha ter 2.
Penetration rotection Small arts like screws, nuts, etc. with a diameter larger than 3.6mm
All dimensions in mm unless otherwise noted.
Fig. 22-1: Front view Fig. 22-2: Side view

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All arameters are s ecified at 24Vdc in ut voltage, 8x3.75A out ut currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
23. Accessories
23.1. POWER CONNECTION - POWER-BUS-BARS
These ower-bus-bars are used to connect several PISA-B modules electrically together. The ower-bus-bars distribute the
24V su ly voltage of the PISA-B modules.
The length of 102mm is suitable to connect two PISA-B modules together. The length of 155mm is suitable to connect
three PISA-B modules together. If more than three modules need to be connected to another, a ro riate ieces can be
cut from the 500mm long rail.
The su ly of the 24V is then only done by one fuse module, referably in the middle, because the current is then better
distributed in both directions and the ermissible current of the ower-bus-bars of 32A is not exceeded.
Fuse modules can be lined u on the DIN rail without s acing. The ower-bus-bars can be lugged in from the front of the
PISA-B modules and must have a length that all lug contacts of the modules make a contact.
Order number BUS-BA 1-L102 BUS-BA 1-L155 BUS-BA 1-L500
Order number contains 2 cs. (for + and - ole) 2 cs. (for + and - ole) 1 c.
Colour Grey Grey Grey
Size (l x w x h) 102 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’’)
500 x 3.3 x 11.4mm
(19.7 x 0.13 x 0.45’’)
Weight 9g (0.02lb) er c. 13g (0.03lb) er c. 43g (0.1lb)
Suitable for 2x PISA-B modules 3x PISA-B modules U to 8x PISA-B modules
(2 cs. needed)
Max. current 32A 32A 32A
Fig. 23-1: Mechanical dimensions Fig. 23-2: Mounting exam le