Siemens S5-135U/155U System Manual page 87

Inputs and
Based on the example of the 6ES5 955-3LF41 power supply unit, the
Outputs
following figure shows the arrangement of inputs and outputs on the front
plate of the power supply units:
SIEMENS
Enable
AC line 50/60 Hz
Power supply
AC120V4,5A
AC230V2,6A
EN UH
CAUTION!
Voltage
Disconnect
selector
before
removing
power supply!
L1 N
4 5
1 2
3
Unlock
Fan 1
The following table provides an overview of the labelling and purpose of the
inputs and outputs:
ID
A
B
C
D
E
F
G
H
I
J
System Manual
C79000-G8576-C199-06
Central Controllers and Expansion Units Power Supply Units
Voltage Monitor Fan
Input
Warning Alarm
Fault max. AC 250 V/ 3A
DC 24V Ext.
Power
Alarm
–
+
I
I
6 7 8 9 10 11
Unlock
Fan2
Label Element
AC 120V 4.5A Screw terminals
AC 230V 2.6A 1, 2, 3
EN Screw terminal 4
U Screw terminal 5
H
Input Screw terminals
DC 24V Ext. 6 and 7
Fan Warning Screw terminals
max. 250V/3A 8, 9, 10 (relay)
Fan Alarm Screw terminals
max. 250V/3A 11, 12, 13
(relay)
Battery Screw terminals
Warning 14, 15, 16
max. 250V/3A (relay)
3V = 40A 2 test sockets
Output Screw terminals
DC 24V 2.8A 17, 18
Ext.Batt. 2 input sockets
DC 4.5V
DC 5/15/24V
Battery
Internal
Output
Warning
DC 24V 2,8A
max. AC 250V/3A
+
–
Batt. 3,6V/5Ah
–
+
Use battery holder
13 14 15 16 17 18
12
C98100-A1155-B21
only!
Unlock
Replace by
Fan3/Res.Batt
trained personnel
.
only!
Purpose
AC connection and protective conductor
Enable Power Supply
Control input for power supply
Supply for EN
Voltage Monitor
Monitors 24 V load voltage for > 16 V
Indicates failure of a fan
Indicates failure of at least two fans and
inadequate air flow; if jumper set
accordingly, output enable is the second
signal source
Indicates that lithium battery or
rechargeable battery has dropped below
limit
Current measurement sockets for test
purposes only; no continuous operation;
linearity range 0.5 V/6.6 A to 3 V/40 A
Enable voltage for I/O modules
Input for an external 4.5 V backup
voltage
Ext.Batt.
DC 4,5V
+
–
4-21