Epson RC90 User Manual

2. Installation
RC700 / RC90 Option Fieldbus I/O Rev.14 85
Station
There are four types of stations (devices):
Master : Controls a network and gathers its slaves.
Slave : External I/O and other devices/
Slave outputs data as a response to a master’s output order and informs
the master of its input status.
Repeater : Repeater is necessary for a network with more than 32 slaves to separate
network segments.
Configurator : Used only for network installation. It configures a scan list of the slaves
on the master device.
You can install masters anywhere in the network. You can connect up to 126 stations
including server and repeater in the network. However, it is recommended to keep one
device for the engineering device.
Network Cable
The PROFIBUS cable can be used as a network cable. There are four types (A, B, C, and
D) of PROFIBUS cables. Normally, cable type A is used for PROFIBUS DP network.
The cable type A specifications are shown in the table below.
Item
Specification
Impedance
135 to 165 Ω
Capacity
< 30 pf/m
Loop resistance
110 Ω/km
Wire diameter
0.64 mm
Core cross-section
> 0.34 mm2
It is recommended to use a 9-pin D-Sub connector for protecting rating IP 20. For IP
65/67, M12 connector (IEC 947-5-2 compliant), Han-Bird connector (DESINA compliant),
and Siemens hybrid connector are available.
Pin assignment (9-pin D-Sub)
Pin No.
Signal
Assignment
1
Shield
Shield / Protective ground
2
M24
Ground of output voltage (24 V)
3
RxD/TxD-P
Data line B
4
CNTR-P
Repeater control signal (directional control)
5
DGND
Communications power supply (5 V)
6
VP
Supply voltage to terminating resistor (P5V)
7
P24
Output voltage (24 V)
8
RxD/TxD-N
Data line A
9
CNTR-N
Repeater control signal (directional control)
Use pins 2 and 7 for connecting a maintenance device without any power supply.

Epson RC90 Specifications

General

Brand	Epson
Model	RC90
Category	Controller
Language	English