Connecting Of The Operating Power Supply; Connecting The Signaling Contact Wires; Figure 5-8 Operating Power Supply, Pin Assignment 5-Pin Terminal Block; Figure 5-9 Signaling Contact Relay With Floating Contacts - Siemens OLM/P11 V4.0 Operating Instructions Manual

Installation and Maintenance

5.4 Connecting of the Operating Power Supply

5.4 Connecting of the Operating Power Supply
L1+
F1
M
F2
L2+
Figure 5-8 Operating power supply,
pin assignment 5-pin
terminal block

5.5 Connecting the Signaling Contact Wires

F1 F2
Figure 5-9 Signaling contact relay
with floating contacts;
In case of error, the
contact is open
L1+
F1
M
F2
L2+
Figure 5-10 Signaling contact, pin
assignment 5 pin
terminal block
SIMATIC NET PROFIBUS, Optical Link Module
Operating Instructions, 07/2008, A2B00065774O, Edition V1.5
The terminal block can be removed from the device to allow
cables to be connected.
Supply the module only with a stabilized safety extra-low
voltage of a maximum of +32 V (typically +24V) according
to IEC 950 / EN 60 950 / VDE 0805. According to the
UL/CSA-approval, the power supply unit must meet the
requirements of NEC, Class 2. This can be supplied via
the 5-pin terminal block on the top of the module.
To increase the operational reliability, the module can be
supplied redundantly via the terminals L2+/+24 V DC* and
M. If the regular supply voltage fails, the module
automatically switches to the redundant power supply.
There is no load splitting between the individual power
supplies. The signaling contact does not indicate the
failure of one of the 24 V supplies. To monitor the power
supply, the supplies and the signaling contact must be
connected to an input module.
Latches on the terminal block ensure a secure connection to the
device and avoid polarity reversal.
The terminal block can be removed from the device to allow
wiring to be connected.
A relay with floating contacts is available for the signaling
contact on the 5-pin terminal block on the top of the module.
This relay can be used to signal problems in the network and on
the modules. If a problem occurs, the contact is opened. This
means that a total power outage is also signaled.
The problems indicated by the signaling contact are listed in
section 5.7. Limit values of the signaling contact:
– maximum switching voltage 50 V DC; 30 V AC
– maximum switching current 1.0 A
The voltage connected to the relay must be a safety extra-low
voltage according to IEC 950/ EN 60 950/ VDE 0805 and must
meet the requirements of NEC, Class 2 in accordance with the
UL/CSA approval.
Connection assignment 5-pin terminal block:
Terminal F1 and F2.
Please make absolutely sure that the terminals of the 5-pin
terminal block are connected up correctly. Make sure there is
adequate electrical insulation of the connecting cables to the
signaling contacts, especially if you are using voltages higher
than 32 V. Connecting up wrongly can lead to the destruction
of the modules.
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