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1MRS750881-MUM
Remote Monitoring and Control Unit
Technical Reference Manual
REC 523
A040382
Fig. 5.2.2.-1
Operation time versus temperature with 17 Ah batteries
Batteries
Sealed lead-acid batteries, for example, Yuasa’s NP 17-12, NPL 24-12 or equivalent
are recommended to be used, refer to Section 7.1. Technical data.
Current limiter
A current limiter should be used when the battery capacity is less than 7 Ah. The
current limiter is to be connected between the charger output (connector X7.1, pin
10) and the + pole of the battery to prevent the charging current from exceeding the
specified maximum limit of about 0.6 A.
Fig. 5.2.2.-2
Circuit diagram for current limiter
The voltage of the batteries may vary in range of 19...32 V.
The batteries are charged by the battery charger of the REC 523 device.
-50
-40
-30
-20
-10
0
10
20
30
Operating time/h
Temperature/°C
40
30
20
10
0
X7.1
9
10
V1
R2
R1
+ 12 V -
BATTERY
+ 12 V -
BATTERY
V1 = Diode 4A , 50 V
R1 = PTC resistor , Rn=2,3 ohm (Siemens B59940-C160-A70)
R2 = Resistor 3 ... 4 ohm, 2W
REC 523
Charlim