User's Manual

MorphoAccess® SIGMA Lite Series – Installation Guide
Section 1 : Introduction
2015_2000007248-V1 - Draft
This document and the information therein are the property of Morpho. They must not be
copied or communicated to a third party without the prior written authorization of Morpho
11
June 2015
Safety Instructions
means Direct Current (DC)
The installation of this product should be made by a qualified service Person and
should comply with all local regulations.
It is strongly recommended to use a class II power supply at 12VDC-24VDC and 1A
minimum (at 12VDC) in conformity with Safety Electrical Low Voltage (SELV). The
power supply cable length should not exceed 10 meters.
This product is intended to be installed with a power supply complying with
IEC60950-1, in accordance with the NEC Class 2 requirements; or supplied by a listed
IEC60950-1 external Power Unit marked Class 2, Limited Power source, or LPS and
rated 12VDC, 1A minimum or 24VDC, 0,5A minimum.
In case of building-to-building connection (power source in a building, and terminal in
another building), it is recommended to connect the 0V of the power supply to the
earthing system of the building. And the terminal block Power Ground must be
connected with the earthing system of the other building.
Note that all connections of the MorphoAccess® SIGMA Lite Series terminal described
hereafter are of SELV (Safety Electrical Low Voltage) type.
Wiring Recommendations
Morpho recommends using a gauge AWG20 for 12VDC power supply (when the
terminal is not powered using POE feature).
The voltage must be measured on the product block connector and must be equal to
12VDC-24VDC (-15% / +10%)
For information, this table shows the maximum drop voltage observed on the
terminal MorphoAccess® SIGMA Lite Series, depending on the length of the cable:
Gauge AWG
Diameter
(mm)
Maximum drop
voltage @ 1m
(V)
Maximum drop
voltage @ 5m (V)
Maximum drop
voltage
@ 10m (V)
20
0.81
0.03
0.17
0.33
22
0.64
0.05
0.26
0.53
24
0.51
0.08
0.42
0.84
Drop voltage = loss of power due to wire resistance and its length:
V2 = V1 – Drop voltage
V1
V2
L