Datafox Evo 4.6 FleKey, Руководство пользователя

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Manual Datafox Evo 4.6 FleKey Page 114 Date: 14.09.2021 V 04.03.17.XX
5.8.8. Calculation for the power supply of Access modules
When using Datafox access readers or door modules, the necessary cable cross-section has to be
calculated before setting up an RS485 network for access control. The voltage drop in the whole
bus must not exceed 4 V. Please note that if you use a Datafox device power supply unit as voltage
source, 16 modules at most (8 in the RS485 bus and 8 via RS232 stub line) can be fed.
Maximum power consumption of the single modules:
TS-TMR33-TR
56,5 mA 16 V max. 8 V min.DC
TS-TMR33-TM 156,0 mA 16 V max. 8 V min.DC
TS-TMR33-TMR 180,0 mA 16 V max. 8 V min.DC
EVO-reader
250,0 mA 24 V max. 9 V min.DC
PHG-reader 250,0 mA 24 V max. 9 V min.DC
The result is a permissible maximum power consumption per Datafox power supply unit of (8 x
180.0 mA + 8 x 56.5 mA) 1.9 A. In order to assure this, you can calculate the necessary cross-sec-
tion for a given cable length or the permissible maximum cable length for a given cable cross-sec-
tion.
!
Caution:
Before setting up and commissioning a ZK-network, the calculation
has to be done by a person qualified in this field.
The cable cross-section is calculated as follows:
The following applies for 12 V voltage supply:
Uv
= voltage drop. 4V at most. 4 V TMR33
Uv
= voltage drop. 4V at most. 3 V PHG and Reder EVO-ZK
Uv is calculated from the supply voltage minus the minimum voltage for the reader.
Thus, the equation for calculating the maximum cable length for a given cable cross-section
is:
v
U k
l I
Q

 

2
I
U k Q
l
v

 

2
Q
= wire size in mm
2
I
= current
l
= wire length in m
k
= Conductivity for copper 56
2
mm
m
 