Stem NCUM 20 User manual

OPERATION
The safety unit NCUM20 integrates the unit for uncontrolled movement and a
leveling control unit. It can be used in different way
Mode with independent leveling (Fig.1): in some application is needed to
separate the elevator levelling from the UCM detector to avoid, in case of exit
from leveling zone, that the controller put the elevator out of order.
In this case, the system needs to add to the NCUM20, also a control unit for the
leveling (NC80,NC96LIFT) with an additional 2 contacts sensor.
The leveling unit output, in parallel with the safety door contact, make the
optoisolated input C11 The magnet used to activate the double contacts sensor
wired on the inputs S11-S12, S21-S22 must be positioned so that its activation
will be longer then the activation of the leveling control unit sensors
If the input PS2 is connected before the car door contact, the NCUM will
automatic restart closing its outputs (13-14/ 23-24) in case a safety contact before
the door has been opened ( it's not an unintended car movement) . If the power
supply sense (PS2) is not used, the door contact has to be wired at the
beginning of the elevator safety circuit.
Mode with or without leveling on the elevator safety circuit (Fig.2):the control
unit NCUM20 integrated as well the leveling function as the uncontrolled
movement function.
The safety door contact is wired in parallel with the outputs 53-54 in case it is
needed the leveling with open doors, and it is connected to the optoisolated input
C11 If the leveling is not necessary the outputs 43-44 must be wired on the input
S41.
If the input PS2 is connected before the car door contact, the NCUM will
automatic restart closing its outputs (13-14/ 23-24) in case a safety contact before
the door has been opened ( it's not an unintended car movement) . If the power
supply sense (PS2) is not used, the door contact has to be wired at the
beginning of the elevator safety circuit.
Mode independent inputs (Fig.3): in this case the system is completely
independent from the elevator safety circuit, in fact it is used the input S42
provided by a second safety door contact(mechanical or provided from the Stem
IP67 Unit) while at the input S41 is connected the output 43-44 of the leveling unit.
The 53-54 can be used as standard leveling output
The unit NCUM20 monitors the signal status of the inputs (C11-C12, S41-S41)
and if a dangerous event happen, it will open the safety outputs 13-14/ 23-24
The unit NCUM20 allows the leveling operation with open doors. Monitoring inputs
S11-S12 and S21-S22it will open the safety contacts 43-44/53-54 if the car
moving out the doors zone(detail on the leveling operation in fig.7 and fig.8)
Hazardous event
Is consider an Hazardous event a car movement with the doors open out of the
door zone. Therefore the positioning of the magnet for the leveling must be due to
guarantee the car stop within one meter in case of uncontroled movement
as indicated in the normative.
Start
As required by law, if a hazardous event occurs, the output will remain open until
the safe operation by a competent person will bring the system in safety
conditions and send a signal to start contacts (S31-S32). If a temporary lack of
power supply happen, the module will continue to work if it is connected to the
battery.
SAFETY PRECAUTIONS
The inputs of the unit(C11-C12-S41-S42) must be safety contacts comply
with paragraph 5.11.2 of the standards EN 81-20:2014 and perform a
function of personal protection; they should not be bypassed (by shorting the
contacts), moved, removed or rendered ineffective by other means. Incorrect
installation or manipulation can cause serious personal injury. The
manufacturer or installer of the machine is responsible for the proper and
safe operation.
The auxiliary output 31-32-33/61-62-63 provides a indication on the status of
the device, so it must not be used in any way as a safety output.
The NCUM20 is not suitable for operation in the presence of ionizing and non
ionizing radiation (X-rays, microwaves, lasers, ultraviolet rays).
The NCUM20 control unit must be assembled in a suitable operating area
(switch cabinet, protective housing).
In the following cases you must use a IP54 cabinet:
- If the safety UCM outputs (13-14,23-24) have a voltage difference between
them greater than 160V
- if outputs of the leveling safety output (43-44, 53-54) have a difference of
voltage between them exceeding 160V
Operating instructions for safety control unit mod. NCUM 20 - Original instructions -
!
DESCRIPTION
The unit NCUM20 is a safety device used to detect the uncontrolled movement
of elevators in accordance with EN 81-20:2014, EN 81-50:2014.The operation
of this module is based on the use of guided safety relay contacts.
ELECTRICAL CONNECTION
Electrical connection must be performed by authorized personnel only.
All the electrical inputs must either be isolated from the mains supply by
a separate coils safety transformer in accordance with EN IEC 61558-2-6
with limited output voltage in the event of a defect or by another
equivalent movable mechanism.
Each safety relay output (13-14/23-24/43-44/5354) has a maximum
current of 3 A; the supply connected to the outputs must be protected
from overcurrents by devices adequate to the loads that have to be
protected.
All the output contacts must have an adequate protective circuit for
capacitive and inductive loads. A fast-blow 500mA fuse must be
connected to input A3 of the battery (+12 V).
If a common power supply is used, all the inductive and capacitive loads
(e.g. relay contactors) connected to the power supply must be connected
to appropriate interference suppressors.
ASSEMBLY
Installation must be performed by authorized personnel only.
The unit is installed by clipping it to a standard 35 mm top-hat rail.
SERVICE AND INSPECTION
The correct functioning of the NCUM20 safety unit must be controlled by the
operator and/or by the control circuit of the elevator periodically by checking:
- correct switching function
- secure mounting of components
- correct connection fixing.
The monitoring function of the unit is done at every switching.
In the event of damage or wear and tear, the damaged system component
must be replaced.
Liability coverage is void under the following circumstances:
- if instructions are not followed
- non-compliance with safety regulations
- installation and electrical connection not performed by authorized personnel
- non-implementation of functional checks.
SETUP
If the control unit does not appear to function when operating voltage is
applied (green "Power" LED does not light up), the unit must be returned
unopened to the manufacturer.
Check whether the safety outputs are being switched (see LED display) by
activating the two inputs and START.
LED
Second door contact*: CLOSED
Power supply
Function
State
Color
Green
Output 13-14 e 23-24: CLOSED
LED Table
on
CP
Green on
PWR
Green on
OUT
* Second contact of a double door contacts or second output of the
STEM IP67 safety door system.
If the contacts S41 and S42 are bothclosed (+12 V),
the CP LED remains off.
!
Subject to technical modifications without notice, no liability will be assumed for any detail. © STEM S.r.l. 1SMANCUM20 rev.4 15/02/2017
Levelling Sensor S1 S1 Green on
Levelling Sensor S2 S2 Green on
Output 43-44 e 53-54: CLOSED OUTL Green on
STOPPING DEVICES
The stopping elements usable with our device are: electrical brakes,
solenoid lock to activate the overspeed governor, solenoid valves.
The stopping elements have to comply the EN 81-20:2014. If the
switching current to energize the braking element is greater than 3A (6A
in case of outputs 13-14/23-24 connected in parallel) appropriate
contactors in accordance to the point 5.11.2 of the EN 81-20:2014, have
to be installed between NCUM and the coil of the braking elements. The
response time of the contactors have to be considered in the global
system response time calculation.
- 1 -
STEM S.r.l. via della Meccanica, 2 I-27010 Cura Carpignano Pavia Italia Tel. [phone] Fax [phone] www.stemsrl.it [e-mail]
If the elevator car is at the floor, the safety output (13-14, 23-24) remain
closed instead, if the cabin is out the floor, the level unit is open and in
cosequence also the safety outputs (13-14, 23-24) will be open.
The unit sense the presence of power supply, thanks the inputs PS1,PS2
and it will send an automatic start to close the outputs contact.

Operating instructions for safety control unit mod. NCUM 20 - Original instructions -
signal Output
Power supply
24 V ac/dc
~~ +
-
V+
3233 31
14
Doors
contact
SAFETY
CHAIN
voltage
Safety chain
IN Safety chain
OUT
FIG. 1 Indipendent levelling mode
24
K21
K11
Safety
outputs
UCM
K22
K12
+
4454
K51
K41
K52
K42
~~ +
-
Start
(Leveling)
Feedback
control loop
6263 61
+
L
Signal output
Power supply
24 V ac/dc
~~ +
-
V+
3233 31
14
Feedback
control loop
Start
(UCM)
Ka
Kb
NDoors
Contact
SAFETY
CHAIN
Voltage
Safety Chain
IN Safety Chain
OUT
24
S42 43C11
C12
A2 A1 13 23 S32 S22
leveling
unit
K21
K11
Safety
outputs
K22
K12
S12
+53
4454
K51
K41
K52
K42
Safety
levelling
output
PS2PS1
~~ +
-
C11
S41
Start
(Leveling)
S33
S11S31
Feedback control
loop
6263 61
A3
A4 +
+
Signal output
Power supply
24 V ac/dc
~~ +
-
V+
3233 31
14
SAFETY
CHAIN
voltage
24
K21
K11
Safety
output
UCM
K22
K12
+
4454
K51
K41
K52
K42
Levelling
safety output
~~ +
-
Start
(Leveling)
Feedback control
loop
6263 61
+
+
IP67
SAFETY
CHAIN
IZ
N.O.
IZ
N.O.
IS
N.O. ID
ID IS
SUM
2 NO separated
MZ
MD
MS
IUM
N.O.
N.O.
N.O.
IZ
N.O.
IS
N.O.
ID
MZ
MD
MS
N.O.
IZ
N.O.
IS
N.O.
ID
MZ
MD
MS
L
Feedback control
loop
Start
(UCM)
Ka
Kb
N
L
Feedback
control loop
Start
(UCM)
Ka
Kb
STOP
DEVICE 1
N
FIG. 2 with or without levelling on safety chain mode
FIG. 3 Indipendent safety chain mode
43 - 44
C12
S42
S41
A1
A2
A4
PS1
PS2
31
32
33
53 - 54
C11
S11 - S12
S21 - S22
S12 - S33
S31 - S32
V+
61
62
63
A3
13 - 14
23 - 24
Safety circuit input AC/DC (voltage according to ordering code)
Safety circuit voltage reference AC/DC
Second door conctact input
Second levelling unit contact input
Leveling unit first sensor input
Leveling unit second sensor input
Start / feedback leveling contact
Start / feedback UCM contact
Power supply module 24VDC positive / 24VAC
Power supply module 24VDC negative / 24VAC
Positive 12V battery power supply (connect 500 mA fast blow fuse)
Negative 12V DC battery voltage
UCM internal suppy positive supply volatge
Sense power supply pin1 AC/DC(Vmax Voltage safety circuit)
Sense power supply pin2 AC/DC(Vmax Voltage safety circuit)
UCM safety output1
UCM safety output2
Auxiliary output UCM: Comon
Auxiliary output UCM: NC
Auxiliary output UCM: NO
Levelling unit safety output1
Levelling unit safety output2
Levelling auxiliary output: Common
Levelling auxiliary output: NC
Levelling auxiliary output: NO
S21
-
-
S42 43C11
C12
A2 A1 13 23 S32 S22
S12 53
PS2
PS1
C11
S41
S33S11
S31 S21
S42 43C11C12A2 A1
13 23 S32 S22
S12 53 PS2
PS1
C11
S41
S33
S11S31 S21
A3
A4
A3
A4
-
-
-
-
Safety circuit
reference
STOP
DEVICE 2
STOP
DEVICE 1
STOP
DEVICE 2
STOP
DEVICE 1
STOP
DEVICE 2
Signal output
Signal output
signal Output
- 2 -
STEM S.r.l. via della Meccanica, 2 I-27010 Cura Carpignano Pavia Italia Tel. [phone] Fax [phone] www.stemsrl.it [e-mail]
Safety circuit
reference
Safety circuit
reference Safety circuit
reference
Safety circuit
reference Safety circuit
reference
Battery
12 V dc
Battery
12 V dc
Battery
12 V dc
CONNECTORS PINS FUNCTIONALITY
Subject to technical modifications without notice, no liability will be assumed for any detail. © STEM S.r.l. 1SMA NCUM20 rev.4 15/02/2017

Operating instructions for safety control unit mod. NCUM 20 - Original instructions -
STEM S.r.l. via della Meccanica, 2 I-27010 Cura Carpignano Pavia Italia Tel. [phone] Fax [phone] www.stemsrl.it [e-mail]
ts1
43-44 / 53-54
S1
S2
Manual restart timing diagram
START
Automatic restart timing diagram
t2
2) Automatic leveling start
External contactor feedback loop
(shortcut if unused)
LEVELING UNIT FUNCTIONALITY
The safety module NCUM20 has integrated a leveling unit and it is able to check the status of the contacts (S11-S12/S21-S22): the leveling
output (43-44 /53-54) are activated if the sensors are in the correct position and if the start button S41 has been activated. The opening of
even only one input contact (S11-S12/S21-S22) , leads to a safety situation, by putting the safety outputs (43-44 /53-54) in open state and by
preventing the closing even after the re-closing of the contact and the pressure of the START button.
For the automatic start, please check the following scheme.
The responsibility to choose the adequate components for safety applications, for example guided contacts safety relays, falls to the user.
1) Manual leveling start
S1
External contactor feedback loop
S2
Avvio
S1 S2
ts1
43-44 / 53-54
S1
S2
t2
FIG. 4 Conections and timing diagram for manual restart FIG. 5 Conections and timing diagram for automatic restart
S42 43C11
C12
A2 A1 13 23 S32 S22
S12 53
PS2PS1
C11
S41
S33S11
S31 S21 S42 43C11
C12
A2 A1 13 23 S32 S22
S12 53
PS2PS1
C11
S41
S33S11
S31 S21
Leveling unit sensors positioning
Sensors and leveling unit have to comply EN81-20:2014. The sensor targets (typically a magnet) have to be positioned in the door zone and their legth
have to be appropriate in order to guarantee the car stopping within 1m from the landing sill as required by EN81-20:2014. The trimming of the target
length (i.e. magnet) is in charge of the user in accordance to the response time of the stopping element and the elevator speed.
-3-
N.O.
IZ
N.O.
IS
N.O.
ID
MZ
MD
MS
L
Ka
Kb
N
~~ +
-
V+
3233 31
14 24
S42S41 43C11
C12
A2 A1 13 23 S32 S22
K21
K11
K22
K12
S12
+53
44
54
K51
K41
K52
K42
PS2PS1
~~ +
-
C11
S21
S33S11S31
6263 61
A3
A4
+
-
-
-
STOP
DEVICE 2
STOP
DEVICE 1 DOOR
CONTACT
Feedback
control loop
Start
(UCM)
Feedback control
loop
Start
(Leveling)
Safety
Circuit
Safety
Circuit
in
Safety
Circuit
out
Safety
output
UCM Signal output
Power supply
24 V ac/dc Levell ing
safety output
FIG. 6 Uncontrolled mouvement test
Safety circuit
reference Safety circuit
reference
+
Battery
12 V dc
TESTING PROCEDURE ACCORDING TO EN81-50:2014
Testing procedure according to § 5.8.3.2.4
1) Install all the appropriate out of service signaling at each floor
2) Check that nobody is in the car
3) Deactivate the landing call
4) Change the electrical connection as indicated in fig.1 (AnnexA)
5) Using the maintenance panel send a landing call
6) The NCUM will open the outputs 13-14, 23-24
7) The stopping element will be activated
8) Measure the braking trip distance
Subject to technical modifications without notice, no liability will be assumed for any detail. © STEM S.r.l. 1SMA NCUM20 rev.4 15/02/2017

Operating instructions for safety control unit mod. NCUM 20 - Original instructions -
STEM S.r.l. via della Meccanica, 2 I-27010 Cura Carpignano Pavia Italia Tel. [phone] Fax [phone] www.stemsrl.it [e-mail]
Relative humidity: 5% ... 95%
Temperature: -25 ... +70
Relative humidity: 4% ... 100%
max: 0,5A @ 24 Vdc
IEC 60068-2-6:2007, IEC 60068-2-27:2008
EN 12015: 2004, EN 12016: 2004 + A1: 2008
IP20
750 mA PTC fuse
EMC compliance
Approval
Housing conditions
Auxiliary outputs terminals
Weight
Internal fuse on the suply
External fuse on outputs 13-14, 23-24, 43-44, 53-54
Safety output swiching power
Minimum switching current @ 10 V
Safety outputs switching voltage
Pollution Degree (see note1)
Degree of protection (IEC 60529)
Vibration resistance
Current consuption
Usage category / Electrical life
(SAFETY outputs)
A3 uncontroled movement safety outputt contacts
Supply voltage
Operating conditions
Parameter
Dimensions
Housing material
Mechanical life 7
10 cycles
4 A gG (according to IEC EN 60269-1)
10
13 -14 / 23-24
24 -15% / +10% (AC 50 ÷ 60 Hz)
@24Vdc: 80 min, 210 max; @24Vac: 190 min, 480 max
3
Temperature: -5 ... +55
160,5 x 96,8 x 62,5 (height)
Value
335
PA
VA
V ac
mA
V dc
°C
mA
kPa
g
mm
°C
Unit
20OFF state response time
31 - 32 NC 31 - 33 NOAuxiliary uncontroled movement safety output contacts
Switching current AC-1 / Electrical life
240 (max) (Safety output)
720 (max)
3 A (Ssfety output) / >10 cycles
5
In accordance with EN 81-20:2014, EN 81-50:2014
ms
Assembly 35 mm DIN standard rail
Connection type Screw terminals
AC-15: 1,4 A / 240 V (inductive load, cosΦ=0,3)/10 cycles
DC-13: 1A / 24 V / 10 cycles
5
200Max input sensor resistence ohm
Battery supply voltage 12 -15% / +10%
V ac/dc
Pressure: 86 ... 106
Pressure: 86 ... 106
kPa
EN 81-50:2014
Safety leveling output contacts 43 -44 / 53-54
61 - 62 NC 61 - 63 NO
Auxiliary levelling output contacts
SAFETY CIRCUIT
VOLTAGE
24V
48V
110V
ORDERING CODE
220V
NCUM20000024
NCUM20000048
NCUM20000110
NCUM20000220
TüV SUD EDES010
- 4 -
A
60V NCUM20000060
TECHNICAL DATA
500 mA fast blow fuse
External fuse on battery supply (A3, +12V)
Subject to technical modifications without notice, no liability will be assumed for any detail. © STEM S.r.l. 1SMA NCUM20 rev.4 15/02/2017
5
Overvoltage category 3
NOTE 1
Condition met if:
-The UCM safety outputs (13-14,23-24) in the final application have a voltage differencebetween them of less than 160V
- The leveling of safety outputs (43-44, 53-54) have a voltage difference between them of less than 160V