ABB REC 523 Technical Reference Manual page 26

REC 523
26
Remote Monitoring and Control Unit
Technical Reference Manual
Operating time/h
40
30
20
10
0
-50 -40 -30
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.
X7.1
REC 523
9
R1
10
V1 = Diode 4A , 50 V
R1 = PTC resistor , Rn=2,3 ohm (Siemens B59940-C160-A70)
R2 = Resistor 3 ... 4 ohm, 2W
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.
-20 -10 0
Temperature/°C
V1
R2
+ 12 V -
+ 12 V -
BATTERY BATTERY
1MRS750881-MUM
10 20 30
Charlim
A040382