Omron GRT1 - 27-11-2006, Operation Manual

Page: 34 / 111

15
Unit Components
Section 2-1
2-1-4 Power Supply Connector
The PROFIBUS Communication Unit provides two 24VDC power supply ter-
minals on the front of the Unit.
Note System Power supply and External I/O power supply are not transferred
through the GCN2-100 Turnback cable. The GRT1-TBR units provide the
same set of Power supply terminals as the PROFIBUS Communication Unit.
2-1-5 PROFIBUS Connector
The PROFIBUS connector on the font of the Unit is a 9-pin female sub-D con-
nector, as recommended by the PROFIBUS standard EN50170.
The signal RTS (TTL signal) is for the direction control of repeaters, which do
not have a self-controlling capability.
The signals DGND and VP are used to power the bus terminator located in
the cable connector.
Note 1. The orientation of the sub-D connector allows the use of PROFIBUS con-
nectors with a 90° angle cable outlet, e.g ERNI, Delconec and Phoenix.
2. The 9-pin sub-D connector uses #4/40 UNC thread for mechanical fixation
of the cable connector. Make sure that if non-standard PROFIBUS connec-
tors are used, the same thread is used on the cable connector.
3. PROFIBUS DP Baud rate setting is accomplished through automatic de-
tection, all the defined PROFIBUS DP baud rate values are supported.
Power supply
terminals
Description
Unit power sup-
ply terminals These terminals supply power to the PROFIBUS Communication
Unit’s internal circuits as well as the connected SmartSlice I/O
Units’ internal circuits (supplied through the SmartSlice bus).
I/O power supply
terminals These terminals supply power to the external I/O that is con-
nected to the System’s SmartSlice I/O Units.
System Power supply terminals
Holes for wires
(pin terminals)
Release button
24 VDC
24 VDC
External I/O Power supply terminals
Pin No. Signal Description
1 Shield Shield/protective ground
2 --
3 B-line Receive/Transmit data - plus (B wire)
4 RTS Control signal for repeaters (direction control) (TTL)
5 DGND Data ground (reference potential for VP)
6 VP Supply voltage of the terminator resistance (5 Vdc)
7 --
8 A-line Receive/Transmit data - minus (A wire)
9 - -
5
9
1
6