Yaskawa Remote I/O Controller LAN Node PCB for use with Microtrac DSD LAN - Manual (Page 2)

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LAN INTERCONNECT
There are 2 connections to be made
in order to connect the RIO to the LAN.
The first connector, J6 (faston tab), is
to be connected to chassis ground. This is
necessary in order to provide a return path
for the snubber network of the LAN.
The other connector, J2, is a BNC
connector to be connected to the LAN
coaxial cable. In order to meet LAN
requirements, type RG-62/U coaxial cable
should be used.
The RIO uses a High Impedence
Transceiver (HIT) for signal transceiving in
order to utilize a bus topology on the LAN.
NOTE
For a full discussion of the LAN,
refer to the MicroTrac DSD
technical manual, TM 6100.
LAN NODE ADDRESS SWITCHES
The LAN Node address switches allow
for the selection of the network ID. The RIO
may have a Node address from 100 to 199.
Since the Node address is in the hundreds
range, the 1 in the hundred’s place is
assumed, and silk-screened on the circuit
board as a reminder. There is a switch for
each of the other 2 numeric positions, ten’s
place (S1) and one’s place (S2). These
switches must be set before power-up, and
remain set while powered up, for proper
operation. If the switches are changed while
powered up, then the LAN Node will get a
new network ID; however, the software will
not (and cannot) be made aware of the ID
change, thus invalid operation will occur.
ANALOG INPUTS
The RIO has 3 analog inputs. These
are 0 to +5 VDC non-isolated analog inputs.
The inputs have 10-bit resolution, are single
ended, and are as accurate as the +5 VDC
supply (+/- 5% but stable). They are
recommended to be used as ratio type
inputs only. In other words, each analog
input should be a fraction of the +5 VDC
supply (e.g., one end of a potentiometer
connected to COMMON, and the wiper
terminal connected to the analog input).
The analog inputs are called AI0, AI1,
and AI2, and can be connected through TB1
pins 1, 2, and 5, respectively. Power
connection terminals are provided that will
supply +5 VDC (TB1 pins 6 and 7) and
COMMON (TB1 pin 4) to the external loads.
I/O EXPANSION BUS
There is an I/O expansion bus
connector on the RIO that allows Remote
I/O boards to be added in order to configure
a given system to meet specific require-
ments.
The I/O expansion bus uses a 40 pin
connector (J3) that is to be connected to
Remote I/O boards through use of a 40 pin
ribbon cable. The bus is intended to be
connected in a daisy chain style from
Remote I/O board to Remote I/O board,
originating from the RIO. A maximum of 6
Remote I/O boards may be connected to the
I/O expansion bus at one time.
The I/O expansion bus carries logic
level signals and power to the Remote I/O
boards. Care should be taken in the routing
of the cable in order to keep it away from
noise inducing circuitry. Furthermore, the
maximum I/O expansion bus length should
not exceed 10 feet.
LED
There is an LED on the RIO (DS1)
that is used to indicate the operating status
of the RIO. This is the only visual means
that the RIO has in order to give its
operating status.
RD 790-10