• In the H201Ci-C: To the DB-9 Male RS-232 Computer Port Connector J10 (item
7 in Figure 4-3) on the circuit board.
• In the H201Ci-1: To the DB-9 Male RS-232 Computer Port Connector J10 (item
7 in Figure 4-7).
Figure 10-2: Host Computer Connection Modes in a Hydran 201R Model i
The installation of an RS-232 serial communication link cable is described in Section
10.5.2.
10.3.1 Local Communications using USB communication link
One or more Hydran 201R Model is and/or Hydran 201i Systems are connected to a
host computer using a USB communication link. This connection can be done as follows
(see Figure 10-2) by connecting the host computer to the USB Type B connector of a
Hydran 201Ti. In this case, the communication can only be established with this
particular H201Ti.
• By connecting the host computer to the DB-9 or USB connector of a Hydran
201Ci Controller. This connection gives access to all H201Ti’s linked to this
H201Ci and also, if present, to all H201Ti’s of all H201Ci’s in this local network.
The maximum distance for an RS-232 link is 7.5m (25ft) and USB link is 5 m (16.4 ft).
10.3.2 Local Communications using RS-485 serial communication link
Starting with the CPU FW v4.0 that supports both proprietary Hydran protocol and
standard Modbus RTU protocol, up to max 32 Hydran 201Ti can be connected to a host
computer to its USB port via a converter RS-485 to USB. An example is shown on Figure
10-3 below. The Hydran 201Tis are connected in daisy chain over the RS-485 link.
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