SBC PCD1 Series - 4.5.4 RS-485 communication interface PORT#1, only on PCD1.M110

Saia-Burgess Controls AG
Manual Manual PCD 1 / PCD 2 Series │ Document 26 / 737 EN22 │ 2013-11-26
4
Communication interfaces
4-9
Onboard interfaces
4.5.4 RS-485 communication interface PORT # 1, only on PCD1.M110
On the PCD1.M110, 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
Bus RS-485
PCD1.M110
Choice of the termination resistors
+5 V
PCD1.M110
Port #1
PCD1.M1xx
PCD2.Mxx0
PCD1.M1xx
PCD2.Mxx0
PCD1.M1xx
PCD2.Mxx0
/RX - /TX
n n
11 n
/n
/n/n
12
RX - TX
+5 V
Pull up
330 Ohm
Termination
Resistor
150 Ohm
Segment length max. 1200 m
max. 32 stations
Bus-RS485
First station Middle stations End station
Pull down
330 Ohm
At the rst 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).