User´s Guide Power Rail Booster Version 12/2005
Copyright © Siemens AG 2005 All rights reserved. 6ES7 972-4AA02-0XA0 Page 37 of 49
8 Technical Specifications
Power Rail Booster
Voltage and current supply
Operating voltage 20,4 V to 28,8V DC, typ. 24 V, SELV, galv. isolated
Power consumption (rated current) Max. 1,2 A
Current at make Max. 15 A approx. 200 µs
Fusing for supply voltage 6 A Category C circuit-breaker
Power dissipation Max. 20W
Signal transmission
Transmission speed 9,6; 19,2; 45,45; 93,75; 187,5; 500kbit/s
Setting of transmission speed Automatic
Signal propagation time ≤ 6 t
bit
Compatibility to
6ES7 972 4AA00 0XA0 Mixed configuration possible
6ES7 972 4AA00 0XA0 with fan Mixed configuration possible, fan not necessary
6ES7 972 4AA01 0XA0 Mixed configuration possible
Safety
VDE / EN Specifications EN61010
PROFIBUS interface
Input / Output signal RS485 level
Input voltage insurance -7V to +12V
Characteristic PIN 6 (Vcc) 5V ± 10%, 50mA
PIN assignments See Documentation, Chapter 6.3.2.4
Galvanic isolation Yes
POWER RAIL interface
Input / Output signal Differential signal up to 40V
Input voltage endurance Differential signal up to 60V, against ground 2,5kV
PIN assignment See Documentation, Chapter 6.3.2.2
Shock-proof Yes, to EN 61131-2
Galvanic isolation Yes (not to internal logic)
Supply voltage interface
PIN assignment See Documentation, Chapter 6.3.2.5
Galvanic isolation Yes
Signalling contact interface
Maximum switching voltage 30 V DC; 230 V AC
Maximum switching current 0,20A
Maximum braking capacity 6 W (resistive load)
In the case of interconnection with inductive loads,
you must suppress interference using suitable
protective circuits (varistors or free wheeling
diodes)
PIN assignment See Documentation, Chapter 6.3.2.6
Galvanic isolation Yes
Electromagnetic compatibility (EMC)
Emitted interference Limit value class B (EN55022)
Immunity to static discharges Shield connection and housing components: ± 6 kV
Contact discharge (EN61000-4-2)
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