Sartorius YDO01C-232 A1 Notice D'installation page 4

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Configuration of the solder bridges
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Configuring the Interface Module
YDO01C-232 (Option A1)
The YDO01C-232 interface module (RS-232 serial interface) is installed directly on the
digital PCB in the Combics indicator (models CISL., CIS., CW.P, CW.S); no further
configuration is required. For details, please see "Installation in the Indicator."
YDO01C-485 (Options A2 and A3)
The YDO01C-485 module (serial RS-485/RS-422 interface, electrically isolated
operated in your choice of the RS-485 or RS-422 mode. Configuring the module for
the intended use involves opening and closing certain solder bridges. In addition to
defining whether RS-485 or RS-422 is used, certain terminating resistors (120 O)
and/or bias resistors may have to be activated or deactivated, depending on whether
a network or point-to-point connection is used.
The positions of the relevant solder bridges are shown in the drawing on the left.
The arrow (1) points to the solder bridge that determines the operating mode (RS-485
or RS-422). When the solder bridge is closed, the interface is configured for RS-422
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operation. Arrows (2) and (3) each mark a row of three solder bridges: 2a, 2b, 2c and
3a, 3b, 3c. When the a and b solder bridges are closed, the bias resistors for the RS-422
(2a and 2b) or the RS-485 (3a and 3b) operating mode are activated. When the c sol-
der bridges are closed, the 120 O terminating resistors are active (2c: RS-422 mode;
3c: RS-485 mode).
The factory defaults are as follows:
– RS-485 operating mode is active (solder bridge 1, RS-485/RS-422 setting: open).
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– Solder bridges 2a and 2b, for activating the RS-422 bias resistors are closed (i.e., both
bias resistors are activated).
– Solder bridge 2c, for the RS-422 terminating resistor (120 O) is closed (i.e., the termi-
nating resistor for operation in RS-422 mode is activated).
– Solder bridges 3a and 3b, for activating the RS-485 bias resistors, are closed (i.e., both
bias resistors are activated).
– Solder bridge 3c, for the RS-485 terminating resistor (120 O) is closed (i.e., the termi-
nating resistor for operation in RS-485 mode is activated).
Operation as an RS-485 Interface (Option A3):
§ Solder bridge 1, for the RS-485/RS-422 setting, must be open (factory setting).
2a
§ Deactivate both RS-485 bias resistors (if active). To do this, open the solder bridges
2b
(factory setting: both bias resistors are activated; i.e., the solder bridges are closed).
The bias resistors must occur no more than once per data transmission path (whether
2c
over a network or in a point-to-point connection); otherwise, transmission errors may
occur. Please refer to the specifications or wiring diagram for the remote station or
network node in question for detailed information. Always activate or deactivate bias
3a
resistors in pairs.
3b
§ Deactivate the terminating resistor (120 O) for operation in RS-485 mode (3c),
3c if active. To do this, open the solder bridge (factory setting: terminating resistor
activated; i.e., solder bridge is closed).
The terminating resistor must be activated if the device is at either end of an RS-485
bus system, or when connected point-to-point with another device. The remote
station must also have a 120 O terminating resistor. If the device is not at either end
of an RS-485 bus system, deactivate the terminating resistor by opening the solder
bridge.
§ The configuration of solder bridges 2a, 2b and 2c is not relevant for operation in
RS-485 mode.
§ The YDO01C-485 module configured as an RS-485 interface is installed directly on
the digital PCB in the Combics indicator (models CISL., CIS., CW.P, CW.S). For details,
please see "Installation in the Indicator."
1) The shielding in the connecting cable is connected at one end to the housing of the indicator.
The indicator is connected to the protective grounding conductor.
1)
) can be