Hardware Manual

Saia-Burgess Controls AG

Hardware Manual PCD 1 / PCD 2 Series│Document 26 / 737│Edition EN 15│2008-07-22

Communication interfaces

4

Serial interface on Port #1

4.4.4 RS 485 communication interface PORT #1, only on PCD1.M110RS 485 communication interface PORT #1, only on PCD1.M110 communication interface PORT #1, only on PCD1.M110communication interface PORT # 1, only on PCD1.M110

On the PCD1.M110, on Port #1, is a built-in RS 485 interface.PCD1.M110, on Port #1, is a built-in RS 485 interface., on Port #1, is a built-in RS 485 interface.

10

11

12

13

12

13

14

15

16

17

18

19

OPEN

CLOSED

19

18

17

16

14

11

PGND

RX - TX

/RX - /TX

PGND

RX - TX

/RX - /TX

GND

Bus RS 485

not used

Bus-cable

Screw-

terminal-

block A

PCD1.M 110 Bus RS 485

Choice of the termination resistors

+ 5 V

PCD 1 .M 110

Port #1

PCD 1 .M1xx

PCD2.Mxx0

PCD 1 .M1xx

PCD2.Mxx0

PCD 1 .M1xx

PCD2.Mxx0

/RX-/TX

n n

11 n

/n

/n /n

12

RX-TX

+ 5 V

Pullup

330 Ohm

Termination

Resistor

150 Ohm

Segment length max. 1200 m

max. 32 stations

BusRS 485

First station Middle stations End station

Pulldown

330 Ohm

At the first and last stations, the jumper must be set to the “CLOSED“ position.

At all other stations, the jumper must be set to “OPEN” (factory setting).