SIPART DR20
Project Planning Manual
3.1.3.2
Alarm Outputs GW
The standard controller contains an adjustable alarm monitoring system with two LEDs on the front
module. This circuit can be programmed such that either the controlled variable, command variable
or deviation is monitored. Two additional modules are available for external signalling of the alarms
which can be inserted as options into the standard controller.
6DR2801-8A Output module with two floating (relay) contacts for 24 V 5 A.
The contact assignment can be set using jumpers.
6DR2801-8B Output module with four digital outputs 20 V / 30 mA and an additional digital input.
Two of the digital outputs are for alarms, the manipulated variable signals are output
via the two other outputs in the S controller. In this case the output relays in the
standard controller for output of the manipulated variable pulses are switched off. If
the digital input of this module is connected to L+ of the standard controller (or to
another 24 V supply), the parameterization and configuring facilities via the front
module of the device are blocked.
3.1.3.3 Serial
Interface
(SES)
6DR2803-8A Interface module to connect the SIPART DR20 to a serial data bus. The levels of
this data bus are based on V.28; switching to V.28 point-to-point communication is
possible using a jumper. Using this module, the device can transmit and receive
process variables, operating states, parameter settings and configuring switch
positions. Up to 32 SIPART DR controllers can be connected in parallel to a bus
line. Combinations with TELEPERM D devices are also possible if the control of the
higher-level computer allows this. A bus driver C73451-A347-B202 must be
connected into the transmission line if more than three bus interfaces are to be
connected together or if the transmission is to be via a line of more than 50 m.
SIPART bus signals can be transmitted over distances up to 500 m; 20 mA current
loop signals (TTY level) are transmitted over larger cable lengths - up to 1000 m.
A separate power supply (± 24 V 100 mA) must be provided for the bus driver if only
SIPART DR controllers are operated on a bus line. A TELEPERM D device can
supply the bus driver if SIPART DR and TELEPERM D controllers are connected
simultaneously to the bus line.
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