Optional Accessories; Connection Of Several Dataloggers - Carel RS232 Manuel D'utilisation

Optional accessories

"T" connector: (code TCONN6J000) enables a Datalogger to be interfaced to a network of several
Dataloggers, thanks to its three RS485 telephone connectors (Fig. 3), two "input" and one "output", and a
terminal block in which the reception, transmission and ground wires of the RS485 serial connectors are
accessible. Connection examples are described in the paragraph on networks (Figs. 4 and 5).
6 5 4 3 2 1 0
A C
B
1 2 3 1 2 3
"A" and "C" are the input RS485 telephone connectors, whereas "B" is the output. The description of the
terminal-block pins is provided in the table on the right. It is recommended to leave the bottom-left jumper
switches in the position 2-3, creating a power switch between "A" and "B" and between "B" and the terminals
(B and C are in any case always connected).

Connection of several Dataloggers

Example: Datalogger network
SERIAL ADDRESS 1 SERIAL ADDRESS 2
sensor 1 sensor 2 sensor 1 sensor 2
Telephone Telephone
cable cable
Conn. "T" Conn. "T"
230Vac
12Vac
Terminal block Function
0 Ground
+VRL ≈ 30Vcc
1
2 Gnd
3 Rx/Tx-
4 Rx/Tx+
5 Gnd
+VRL ≈ 30Vcc
6
Fig. 3
SERIAL ADDRESS ... SERIAL ADDRESS n
sensor 1 sensor 2 sensor 1 sensor 2
Telephone
cable
Conn. "T" Conn. "T"
3 wires: 3,4,5
Modem - PC cable
WinLog
32
A network of Dataloggers simultaneously connected to a PC can be created using "T" connectors as described
above and one of the telephone cables up to 100m available on the market. For Carel's cables, see codes
below. It is recommended to limit the networks to a maximum of 30 Dataloggers.
Important: the "T" connectors must be installed by the installer in derivation boxes or in a proper electrical
panel (both available on the market).
In this example all the connections between the various "T" connectors use three-wire cables (model AWG24
shielded) which carry the transmission, reception, and ground signals to the converter through the terminal
blocks (black rectangles), present both on the connectors themselves and on the RS485-RS232 converter.
In this case, the use of the transformer is required to power the converter, as well as one "T" connector for
each Datalogger. The cable wiring, however, is simple as its involves ordinary three-wire cables, that is,
paired cables, two twisted wires plus one shield.
The connection between the RS485-RS232 converter and the "T" connectors using pair + shield is made as
per the following diagram:
Telephone
cable
Fig. 4
Telephone cable codes
S90CONN002 L= 0.8m
S90CONN000 L= 1.5m
S90CONN001 L= 3m
S90CONN003 L= 6m
power supply
12Vac
RX+/TX+ RX-/TX-
PWR
RX
RX- / TX-
TX
RX+ / TX+
GND
RS485
Network
Shield
Opto-isolated
RS232-485
Converter
33
C
0
1
2
3
B
4
5
6
A
Fig. 5