Operation; Contacts - Vega Absolute Vega SI-13 User Manual

3 OPERATION

CONTACTS

When connecting a modem to external devices, consider the internal circuitry of its
pulse inputs shown below.
The modem has 10 contacts, see table below:
Contact
-V
+V
B
A
Tx
Rx
,
In1, In2
Ground " " contact is used for connecting of RS-232 or RS-485; ground " " is used
for connecting of pulse inputs 1 and 2.
The modem pulse inputs are used to connect circuits with the following types of NO
contacts:
- reed switch (Herkon);
- mechanical pushbutton;
- open-collector output.
8
Description
Power -
Power +
RS-485 B
RS-485 A
RS-232 TX
RS-232 RX
Signal ground
Pulse inputs 1 and 2
Vega SI-13 / User Manual
Revision 13 - 23 September
2020