Analogue Pstn Modem Dm130 - Honeywell EK280 Applications Manual

EK280

7.5.5 Analogue PSTN Modem DM130

7.5.5.1 Connection of a DM130 to the RS232 interface of the EK280
For the connection of a DM130 to the EL280 both devices must be opened
CAUTION! Danger!
Ensure the mains voltage is disconnected before opening the FE260 housing, ensure it is not
turned back on and verify that there is no voltage!
For the operation of the analog modem DM130 to a conversion device EK280, the RJ10 socket running
RS232 interface of the DM130 must be connected with the terminals of the RS232/485 interface in the
EK280 as follows:
EK280
Terminal designation on the
RS232/485 interface
RxD
TxD
GND
(The white DCD core connected to pin 1 of the RJ10 connector is not required for this application.)
On the DM130, the current loop CL1 must be closed when using
the RS232 interface! This is guaranteed by the short-circuiting of
terminals RTX- and RTX+:
The conversion device EK280 can optionally be supplied by means of its internal AC power supply or the +9
VDC auxiliary voltage of the DM130. For the connection of the auxiliary voltage of the DM130, the wiring must
be carried out as follows:
Terminal designation on the RS232/485
interface in EK280
Usio+
Usio-
"Adapter Cable DM130/RS232 – RJ10", Order ID 7302 3135
38
Application Manual
Wire Color Pin-Nr. on the RJ10-connector
38
(4P4C) of the DM130 connection
green
yellow
brown
DM130
cable
38
3 (TxD)
4 (RxD)
2 (GND)
Terminal designation on the DM130
RTX-
RTX+
Terminal designation on the DM130
HS+
HS-
158