Elster EK220, Operating Instructions And Installation Information, Page: 85 / 120

Volume Conversion Device EK220
© Elster GmbH 85
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 With modem control by "return messages" via data lines,
without baud rate selection. Num.T is activated.
or = 5 * 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.
- Bd.S2 = 19200 * Baud rate 19200 Bd (or lower, depending on the device con-
nected to the FE260)
- TypS2 = RS485 Type of interface 2: RS485
- BusS2 = 0 No bus mode.
- Num.T = ... 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
* 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.