Saia-Burgess
Controls Ltd.
Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Communication interfaces
4
4-8
Serial interfaces on I/O module Slot 0
4.5
Serial interfaces on I/O module Slot 0 (Port 1)
4.5.1 RS 485/422 with PCD3.F110
PCD3.F110:
RS 422 with RTS/CTS or RS 485, electrically connected,
with line termination resistors capable of activation, for I/O
module Slot 0. To change the jumper (activate the line ter-
mination resistors) the module housing has to be opened,
as described in
section 5.1.5
, to reach the PCD7.F110
circuit board.
Connections and LEDs for RS 485
Choice of line termination resistors
PCD3.F1
10
0
1
2
3
4
5
6
7
8
9
LED 0...7
Terminal 0
Description-
label
Address-
label
Terminal 9
Terminals
1
1
0
0
1
2
3
4
5
6
7
F
J1
OPEN
CLOSED
PCD7.F110
PGND
RX - TX
/RX - /TX
PGND
RX - TX
/RX - /TX
GND
Bus RS 485
Bus-cable
Cage-
clamp
Bus RS 485
PGND
RX - TX
/RX - /TX
not used
Colour
Signal
amber
TXD
amber
RXD
amber
n.r.
amber
n.r.
amber
n.r.
amber
n.r.
amber
n.r.
green
Detect
n.r. = not relevant
PCD3.Mxxxx
Socket A
+5 V
Pull up
330 Ohm
Pull down
330 Ohm
Segment lenght max. 1200 m
max. 32 stations
Termination
Resistor
150 Ohm
+5 V
/RX-/TX
RX-TX
2
/n
1
n
/n
n
/n
n
PCD3.Mxxxx
PCD3.Mxxxx
PCD3.Mxxxx