Siemens SIMATIC S5 Manual page 61

Design and method of operation of the S5-95U with DP master interface
Table 4-1 The indicators, controls and interfaces of the S5-95U, continued
Callout Designation
in Fig.
4-1
LEDs for digital
5
inputs/
outputs
Terminals for
6
power supply
Jack for I/O
7
modules
Port for analog
8
inputs and analog
output
SINEC L2 DP
9
interface
LED "BF"
10
Mode indicator
11
Mode selector
12
switch
Slot for memory
13
module
Interface for PG,
14
PC, OP or SINEC
L1
Port for alarm and
15
counter inputs
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
Purpose
LED lights up when the signal state of the digital input/output is "1".
These terminals connect the S5-95U to the power supply unit.
If you want to add I/O modules to the S5-95U, connect the ribbon
cable of a bus module to this jack.
Port for the D-Sub connector with the signal lines of the analog inputs
(IW 40 to IW 54) and the analog output (OW 40).
The SINEC L2 DP interface connects the field bus to the S5-95U by
means of a bus connector.
See Table 4-2.
Green LED on: S5-95U is in RUN
Red LED on: S5-95U is in STOP
For details, see Table 4-2
Meaning for SINEC L2 DP
RUN: normal operation; S5-95U cyclically reads the input data of the
DP slaves and sends output data to the DP slaves. The S5-95U can
receive the token from another DP master and pass on the token.
STOP: The S5-95U cannot exchange data with the DP slaves, but it
can receive the token (send authorization) from another DP master on
the bus and pass on the token. All outputs of the DP slaves are set to
"0". The inputs of the S5-95U are reset.
For a detailed description of the mode selector switch in the S5-95U
without SINEC L2 DP, see the system manual S5-90U/S5-95U
Programmable Controller.
Accommodates the memory module (32 K EEPROM)
All important configuration data for the bus layout and the STEP 5
application program is stored on the 32 K EEPROM.
This interface enables you to connect a PG, TD, OP or the S5-95U as a
slave to the SINEC-L1 bus.
Port for the D-Sub connector with the signal lines of the alarm inputs
(I 34.1 to I 34.3) and counter inputs (IW 36, IW 38).
4
4-3