A80, A80t, W80, W80t Operating Manual
28.08.2019
37
6.Electrical connection pin assignments
Use shielded cables only.
The shield should be continuous, and should be electrically
connected to the plug’s housing.
When working with the SERIAL interface, use a null modem cable.
Normal operation can be ensured only if cables no longer than 3m
(9.85 ft.) are used. The use of longer cables does not itself affect
proper performance of the unit, however external interference (e.g.
cellular phones) may have a negative impact on performance in this
configuration.
SERIAL interface
Use this socket to connect
a PC via null modem cable
to
in order to
remotely control the
temperature control
system.
RS232 pin assignments
Pin 2
RxD
Receive Data
Pin 3
TxD
Transmit Data
Pin 5
0 V
Signal GND
Pin 7
RTS
Request to send
Pin 8
CTS
Clear to send
Pin 1; 4; 6, 9 Reserved - do not use!
6.1.
Accessories
Order No.:
Description
8 980 073
RS232 interface cable 9 pole/9 pole, 2.5 m
(8.2 ft) long.
8 900 110
USB interface adapter cable
6.1.1.
Alarm output
This socket is a voltage-free change-over contact. With the options in the
menu item > AL-OUT Function< (see operating instructions for the user
interface), all possible operating conditions can be signalled as desired,
without having to change the wiring of the cable. Normally during an
alarm, pins 2 and 3 are connected.
Alarm output
This output can be used to
alert the user when the
unit enters an alarm
condition, from a distance.
Check the operating
condition of the plug
regularly (about every 2-3
days).
ALARM
Breaking capacity
max. 30 W / 25 VA
with turn-on voltage
max. 30 V
DC
; max.25 V
AC
with switching current
max. 1 A
9
6
5
1
1
3
2
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