Videotec DTMRX2 - Manual (Page 38)

Page 12 MNVCDTMRX2_0351
7.3 Setting the receiver protocol
The DTMRX2 (DTMRX224) receiver is able to operate with four different types of protocol. Set DIP switches 3
an4 of SW1 according to the desired type of protocol and referring to the following table:
DIP 3 DIP 4 Protocol
OFF OFF MACRO*
OFF ON Videotec
ON OFF Pelco D
ON ON COAX
* Default setting
Pelco D Protocol: the receiver sets a communication rate of 2400 baud, irrespective of the DIP 1 and DIP 2
settings for SW1.
7.4 Setting the auxiliary as Wiper
The DTMRX2 (DTMRX224) receiver allows the Auxiliary contact (AUX) to be set for Wiper operation (this
function can only be activated from DCJ and DCT keyboards).
Normally the Auxiliary contact is activated from the keyboards with the AUX 1 command and is then deactivated
with AUX 1. If Wiper mode is activated, the auxiliary contact will only operate when the Wiper key is pressed.
When the wiper key is released the contact is deactivated.
The setting is made on DIP 8 of SW2 according to the following table:
DIP 8 Aux1 Function
OFF Aux1*
ON Wiper
* Default setting
7.5 Setting receiver reception mode (RS232/RS485/COAX)
Jumper JP1 and JP2 settings for RS485 reception:
Jumper JP1 and JP2 settings for RS232 reception:
For COAX reception (telemetry on coaxial cable) just set DIP switches 3 and 4 of SW1 as shown in the section
on setting the receiver protocol.
7.6 Inserting the load on the RS485 line
NOTE: This setting is only necessary if a RS485 communication line is used.
To configure Jumpers JP3 and JP4, refer to the following settings:
Jumper in position A Jumper in position B
Settings: JP3 in position A: load inserted in RS485 transmission.
JP3 in position B: no load inserted in RS485 transmission.
JP4 in position A: load inserted in RS485 reception.
JP4 in position B: no load inserted in RS485 reception.