MAYSER SG-EFS 1 4 ZK2/1 L20ms Series User manual

110707
Safety Control Unit SG-EFS 1X4 ZK2/1 L20ms
with automatic or manual reset
Operating
Instructions
Safety Control Unit with
EEC-type-examination
certicate
EN 954 Category 3
with forceguided contacts for increased
safety requirements;
for Pressure Sensitive Mats, Safety
Edges and Safety Bumpers with
1.2 kΩ monitoring resistor.
These operating instructions apply to
the following control units:
SG-EFS 104 ZK2/1 L20ms 24 V=/~
SG-EFS 134 ZK2/1 L20ms 230 V~
Control
The single-fault-safe electronics module
has two channels (redundant).
Each channel triggers a force guided
relay. The relays self-test by contact
return after each switching cycle. The
electronics monitor the electrical resi-
stance of the connected sensors which
have a specic closed-circuit current.
When the sensors are not activated,
both output relays are energized and
both yellow LEDs light. If a sensor is
activated, or a break occurs in the sup-
ply to the control unit, relays K1 and K2
deenergize and the LEDs go out.
Erroneous tripping signals, caused by
falling material, are prevented by 20 ms
by means of a time element.
Enclosure
W × H × D (mm) 45 × 75 × 105
Protection class IP 20
Plug-in connectors each 8-channel
Cable clamps max. 2.5 mm2
Weight = model approx. 175 g
~ model approx. 270 g
Notes on protection class:
The units may only be used in locations
with a minimum protection class of
IP 54 (eg. cabinet).
Parts supplied
- Control Unit
Enclosure with electronics module and
plug-in connectors.
- Operating Instructions
channel
1
sensor
channel
2
Reset Auto-
Reset
fault indicator
relay
SG-EFS 1X4 ZK2/1 L20ms

110707
Safety Control Unit SG-EFS 1X4 ZK2/1 L20ms
Technical Data
Connecting voltage US
SG-EFS 104 ZK2/1 L20ms AC 24 V DC 24 V
SG-EFS 134 ZK2/1 L20ms AC 230 V
Voltage tolerance -15% to +10% -15% to +20%
Nominal frequency 50 Hz
Frequency tolerance 48 - 62 Hz
Power consumption < 5 VA for AC < 5 W for DC 28 V
Sensor voltage DC 15 V
Control Unit Outputs
Switching channel K1 and K2 11/14, 21/24
Switching voltage max. AC 240 V max. DC 24 V
Switching current 4 A 1 A
Fault indicator relay K3 31/32
Switching voltage max. AC 42 V max. DC 42 V
Switching current max.100 mA max. 100 mA
Permissible ambient temp. -20 °C to +50 °C
IMPORTANT NOTES! Please read!
To ensure correct and safe operation
of the unit, it must be properly trans-
ported and stored, properly installed
and commissioned, and operated in
accordance with its purpose.
Only persons familiar with the instal-
lation, commissioning and operation,
and with the corresponding qualicati-
ons to prove their skills, may work on
the units. They must observe the con-
tents of these instructions, the notes
given on the type plate of the unit and
the safety requirements relevant to the
installation and operation of electrical
systems.
This unit is constructed and tested to
prEN 1760 and DIN V 31006 and left our
factory in perfect condition with regard
to safety. In order to maintain this state,
you must observe the safety regulations
marked "WARNING!" in these operating
instructions. Failure to observe the sa-
fety regulations can lead to death, injury
to personnel, or damage to the unit and
other systems and equipment.
Should the information given in these
operating instructions be inadequate
in any way, please contact your local
technical centre, subsidiary or represen-
tative.
When using the device outside the
European Union, you must observe
the relevant regulations valid for the
country of use.
Note:
When switching inductive loads the
user must be tted out with spark ab-
sorbers.
2 connection variants:
- SG-EFS 1X4 ZK2/1 L20ms
with automatic reset
Bridge 7, 8 must be in place
The unit becomes active again as
soon as the sensor is no longer
activated.
The fault indicator relay K3 works in
synchrony with the sa fety relays K1,
K2 and is available as a voltage free,
normally closed contact.
- SG-EFS 1X4 ZK2/1 L20ms
with manual reset
Bridge 7, 8 must be removed
After deactivation of the unit by the
sensor it must be re-activated by
means of an external reset button.
The fault indicator relay K3 works in
synchrony with the safety relays K1,
K2 and is available as a voltage free,
normally closed contact.
WARNING!
Not for safety circuit:
- The fault indicator contact across 31,
32 is solely for information purposes
and must not be connected into the
safety circuit.
Do not cross link control
units:
- Clamps 5, 6 as well as 7, 8 and Y1,
Y2 are not voltage free and thus
may not be cross linked with further
control units.

110707
contact duplication
for automatic reset
channel2channel1
Installation and Operation
Installation
The enclosure of the control unit can be
mounted in any position:
- on a 35 mm EN 50022 rail
Wiring is carried out in the cable clamps
of the plug-in connection:
Sensor Y1, Y2
Supply voltage A1, A2
Switching channel K1 11,1 4
Switching channel K2 21, 24
Fault indicator relay 31, 32
Reset button 5, 6
for automatice reset only:
Bridge 7, 8
Commissioning
After connecting up sensors, switching
contacts and power, carry out a function
test in the following order:
Sensor not activated
- both yellow LEDs light
- outpit relays K1, K2 are energized
- fault indicator relay K3 is energized
Activate sensor
- both yellow LEDs go out
- output relays K1, K2 deenergize
- fault indicator relay K3 deenergizes
WARNING!
Do not release terminals or remove
the plug-in connection with power
on.
Maintenance
The control unit is maintenance-free.
Check the safety installation monthly by
activating the sensors.
Important notes:
- Supply voltage
must be in accordance with the con-
necting voltage US indicated on the
type plate.
- Permissible temperature range
If installing into a cabinet, maintain
sufcient distance from heat sources
(min. 2 cm).
- Wiring
Wire direct to the control circuit or
continue two-channel mode to the
next circuit.
Fuse the relay contacts externally (risk
of welding).
contacts continued in
two-channel mode
channel 1 channel 2
0.1A
Signalgeber
Auto-Reset Reset
Netzspannung Us siehe
Leistungsschild
EIN
Kanal
1
Kanal
2
contact duplication
for manual reset
channel 1 channel 2
RESET

110707
Check sensor
Check combination
of sensors
Resistance measurement:
Disconnect power to the unit.
Unplug plug-in connection and measure
(Y1,Y2) with an ohmmeter:
not activated c. 1.2 kΩ
activated < 150 Ω
Check individual sensors
Resistance measurement:
Measure each individual sensor with an
ohmmeter:
/BK not activated innite Ω
activated < 150 Ω
/W not activated c. 1.2 kΩ
activated < 150 Ω
If the values measured deviate consi-
derably from the set values, the sensors
have to be checked individually (see
below).
Subject to technical modifications.
Check also cables and cable connec-
tions.
Damaged or faulty sensors must be
repaired or replaced immediately by a
specialist.
Only a functioning system can ensure
maximum safety!
yellow LEDs do not light, relay K1 and K2 are deenergized:
> supply voltage off or incorrect
 Check supply voltage, compare with type plate.
> Faulty sensor or supply lines (break in connection or short circuit)
 Connect 1.2 kΩ resistor instead of sensor. If the yellow LEDs do not light, the
control unit is faulty.
 Replace control unit.
one yellow LED lights:
> fault in control unit
Control unit faulty.
 Replace control unit.
/BK /W
sensor control
unit
Troubleshooting and remedies
Prerequisite: SG-EFS connected to power supply, sensor not activated.