Applications For Interface 2 As Rs485; Fe260 Function Expansion - Elster EK220 Operating Instructions And Installation Information

4.4

Applications for Interface 2 as RS485

4.4.1 FE260 Function Expansion

F
Connection see Chap. 5.6.1, page 95
The FE260 is a mains-powered function expansion incl. Ex isolation and supply for the
EK220. It has may have alternatively an integral modem or a connection for a comme r-
cially available modem.
For the connection of an FE260 with integral or separately connected modem, the follo w-
ing settings should be made under the interface list ( ® 3.13):
- Md.S2 = 3
or = 5 *
- Bd.S2 = 19200 * Baud rate 19200 Bd (or lower, depending on the device con-
- TypS2 = RS485
- BusS2 = 0
- Num.T = ...
* Normally, modems do not execute any baud rate selection so that with Md.S2 = "5" the
values under the addresses 02:708 (Bd.S2) and 02:709 must be equal.
For the connection of a device with baud rate selection, the starting baud rate (normally
300 Bd) must be set under the Bd.S2 (address 02:708) and the baud rate identification
under address 02:709.
© Elster GmbH
With modem control by "return messages" via data lines,
without baud rate selection. Num.T is activated.
Without modem control. Either the modem accepts the call
automatically or another device is connected to the FE260 (no
modem). Num.T is not activated.
nected to the FE260)
Type of interface 2: RS485
No bus mode.
Num.T is only activated with Md.S2 = 3.
Possible values are dependent on the modem used, e.g.:
- Standard modem (Insys) integrated in FE260 ............ 2 to 9
- ISDN modem (Insys) integrated in FE260 .................. 2 to 9
- GSM modem (Wavecom) integrated in FE260 .......... 1 to 9
- Separate GSM modem Siemens M20T or TC35T ...... 1
- Separate analogue modem EM200 or Insys Onbit ..... 2 to 9
Volume Conversion Device EK220
85