Elgo LIMAX Safe SC, Operating Manual, Page: 15 / 84

Product Features
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4 Product Features
LIMAX Safe SG/SC is a safety device fulfilling various safety function named in EN81.
In order to do this, LIMAX Safe SG/SC needs several pieces of information:

Position of lift cabin determined by the subsystem LIMAX33 RED/LIMAX44 RED - a safe position sensor -
 Velocity of the lift cabin, is derived by LIMAX Safe SG/SC from the position values
 Shaft image, learned by LIMAX Safe SG/SC during commissioning
 Various inputs from safety circuit, inspection control, an external button and an external feedback
switch. The external elements are wired as described in chapter
 8.3 to the corresponding inputs of
LIMAX Safe SG/SC
 Nominal speed of the lift in which LIMAX Safe SG/SC is installed. The nominal speed is adjusted in the
factory and marked on the Safe Box. Changing the nominal speed is strictly prohibited.
LIMAX Safe SG/SC contains three potential-free contacts as safety relevant actuators: OC, NOC and SGC:

The bridgeable relay contact (OC) is intended to open the safety circuit on a spot, which can be
bridged by recall panel

The non-bridgeable relay contact (NOC) is intended to open the safety circuit which cannot be bridged
at all

The safety gear relay contact (SGC) is intended:

to open the supply circuit of the trip coil of the blocking device on the speed governor (in case the
option with electronic trigger of speed governor is chosen). This applies to LIMAX Safe SG. The trip
coil and the blocking device do not belong to the certificate of LIMAX Safe SG/SC.

to open the supply circuit of the trip coil of the electromechanically triggered safety gear (in case
the option with electromechanically triggered safety gear). This applies to LIMAX Safe SG. The trip
coil and the mechanical part of the safety gear do not belong to the certificate of LIMAX Safe
SG/SC.

to open the safety circuit which cannot be bridged at all. This applies to LIMAX Safe SC
They have to be integrated into the lift as described in chapter

8.3.
Additional LIMAX Safe SG/SC contains a potential free contact in order to signalize door zones as emergency
rescue aid.
LIMAX Safe SG/SC is connected with the lift control by CAN interface. LIMAX Safe SG/SC provides position and
velocity of the lift cabin to the control via the CAN interface.
Additional data is transferred via CAN interface used for:

Diagnostics

Comparing the shaft image stored in lift control and shaft image stored in LIMAX Safe SG/SC

Signals for door bridging

Learning temporary reference positions in order to keep the technician safe during teach mode

Signals to learn and readjust the shaft image

Request to carry out a relay test

Changing of values of safety-relevant parameters (only within allowed limits)
For details refer to

/CO_SPECS/.
Dependent on the safety circuit voltage the suitable version of the Safe Box as a component of the LIMAX Safe
SG/SC system has to be installed.
There is one variant for each of the following safety circuit voltages:

110 VAC, 50 Hz (with Sensor: LIMAX33 RED)

230 VAC, 50 Hz (with Sensor: LIMAX33 RED or LIMAX44 RED)