Interface Types - SAGEMCOM Dr. Neuhaus ZDUE-GPRS-PLUS-VI User Manual

Procedure for communication between control centre and meter

4.3 Interface types

CL1 (Optional)
ZDUE-GPRS-PLUS-VI
Fixed baud rate:
The speed is set to a fixed value via a parameter setting. The respective
meters that are communicating and the control centre connected via
modem exchange the data at the selected speed, i.e. the ZDUE-GPRS-
PLUS-VI works transparently. The speed does not exceed the GSM speed
(9600 bit/s), or may be less.
Variable baud rate:
Corresponds to the baud rate changeover as per Mode C according to DIN
EN 62056-21.
The starting speed is 300 baud. The speed is increased if the
communicating meter requests it from the corresponding interface, and the
interface confirms the requested baud rate. If there is no confirmation, the
communication continues at the current speed.
Interface CL1 conforms to the current loop interface according to DIN EN
62056-21.
This is an active 20mA interface with a 2-wire connection via the terminals
RTX- and RTX+ (terminals 6 and 7) of the terminal block.
L N HS-
Maximum that can be connected: 4 meters
Attention
If the CL interface is not used, it must be short-circuited with a wire jumper,
since otherwise the other interfaces of the ZDUE-GPRS-PLUS-VI will not
function.
The interface is isolated from the modem by means of an optocoupler.
When reading a meter, all of the characters transmitted to the meter are
transmitted back as an echo via the CL1 interface. These characters are
normally transmitted to the higher-level system. The echo is suppressed by
the modem.
RJ45
HS+ RTX- RTX+
Interfaces
RT- RT+
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