Siemens 6RA7086-6KS22 Operating Instructions Manual page 213

05.05
Option board SCB1 (Serial Communication Board 1) is used to link the 6RA70 SIMOREG DC
master to board SCI1 or SCI2 (Serial Communication Interface) using a fiber optic connection
(recommendation: Siemens plastic fiber optic cable, CA-1V2YP980/1000,200A or Siemens glass-
fiber cable, CLY-1V01S200/230,10A). These boards can be used if the CUD2 terminal expansion
module is not large enough or safe electrical isolation via fiber optics is an absolute necessity.
This board only allows the SCB1 master to exchange data with the SCI slaves. Data cannot be
exchanged between the SCI slaves themselves.
A maximum of 2 SCIs, of either the same or different types, can be connected to the SCB1.
SCI1 or SCI2 are terminal expansion boards which are mounted on a rail outside the SIMOREG
DC master and supplied with 24 V DC voltage (-17% +25%, 1A) from an external source.
The interface boards extend the converter by the following additional inputs/outputs:
SCI1
10 binary inputs
8 binary outputs
3 analog inputs
3 analog outputs
Reception of SCI data by the SCB1 or transmission to the SCIs is synchronized, i.e. the data of two
slaves is received simultaneously or transmitted simultaneously.
Details about the functions and connections of inputs and outputs are shown in the function
diagrams in Section 8.
CAUTION
SCI boards have no external enclosure to protect them against direct contact or ingress of
pollutants. To protect them against damage, they must be installed in a housing or in the
control cabinet of a higher-level system.
The maximum permissible length of fiber optic cables is 10m.
An input filter must be fitted for the external power supply of the interface boards.
Ground SCI at X80 using a short lead.
Analog inputs on SCI1: Only the voltage input or the current input may be used for each
channel.
Analog outputs on SCI1: Only the voltage input or the current input may be used for each
channel. The outputs are short-circuit-proof.
The binary driver outputs are short-circuit-proof. Relays may only be connected to these
outputs in conjunction with an external power supply.
The binary relay outputs are not designed for protective separation.
To protect them against static discharge, the boards may only be placed on conductive
surfaces.
SIEMENS AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
SCI2
16 binary inputs
12 binary outputs
Start-Up
7-55