English
7XV5662-0AD00
38
C53000-B1174-C205-1
When a device or PC with an asynchronous interface is connected with the RS232 interface
of CC–2M, the 7XV5100–4 DIGSI cable can be used as connection cable.
The CC–2M supports the following communication protocol:
E1 – 2048 kBit/s
T1 – 1544 kBit/s
A contact output (relay contact, change over contact) generates a “device ready” signal
(GOK/DR). Only when a relay has picked up the device is ready for data communication.
The NC contact signals a fault. All operating states are signalled via LED. In Figure 16 the
GOK contact is shown in the idle state and at a fault respectivily.
Connections
Figure 16 Interfaces and connections
The following interfaces and connections are located on the device side (Figure 16):
RS232:
The RS232–Interface is used for asynchronous transmission up to 115.2 kBAUD
The maximum admissible setting in DIGSI and the protection device in the case of
applications with DIGSI and SIPROTEC protection devices is 57.6 kBAUD. This RS232
interface is a non-isolated interface and therefore it is not designed for the transmission
of time-critical data. Only the signals Rx, Tx and GND are used for transmission. No
further parameterization for the BAUD–rate.
E1 / T1:
The signals of the E1 / T1 interface must be applied to the 4-pole screw terminal
(E1 / T1, Rx and Tx twisted pair). The fifth screw terminal “S” adjacent on the left is for
contacting the cable screen. The cable screen is connected to the housing. The E1 / T1
interface signals are electrically isolated from the other electrical circuits. No additional
clock is required. The clock is obtained from the SDH/PDH network through the receiving
direction and it is also used for sending the data.
