Velleman К8056 User Manual
Page 9
9
Control options
19. Control options
Normal Current
10K 1K
ON
OF
F
Fig 2.0
9 pole
3 : TxD
5 : GND
25 pole
2 : TxD
7 : GND
0 IN
3
5
5
3
TO PC
SUBD 9 pole female
TO K8056
10 meter max.
5
3
TxD
GND
1) RS232 cable :
Do not use a null-modem cable !!
Jumper setting :
Place JP1 in ON position
Place JP2 in RS232 mode, see fig 1.0.
Choose the impedance, high or low with JP3. Define the
impedance on experimental use. The impedance depends
on the length of RS232 cable you’re using.
Normally the impedance is 10Kohm => select normal.
If you use current loop (long cable), select current. The impedance will be
1Kohm.
2) Wireless link :
It is possible to use the K8056 together with a remote control (e.g. our K8058).
In this case an optional receiver module type RX433 is available.
The receiver module is mounted on the left hand side of the K8056 board.
Watch the position, the coil point to the relays of the K8056. If you choose wire-
less operation, make sure to set jumper JP1 & JP2 in right position.
Transmission quality depends on your environment. Other RF sources might
interfere with your signal.
Jumper setting :
Place JP2 in RF mode.
Place now JP1 in ON position (see fig. 2.0)
Put JP1 in OFF mode if you don't use a remote control (RS232 or wireless link)
RF
RS
23
2
Fig 1.0