Input/Output Modules Ea12; Supplementary Components - Siemens SIMADYN D Hardware Manual

Input/output modules
5.1

Input/output modules EA12

Order No.
Features
Load capability
Adjustment,
temperature
Adjustment
Noise signals at
the outputs

5.1.1 Supplementary components

Interface modules
with terminals
5-2
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6DD1642-0BC0
• 8 analog outputs
• 20-pin connector for the analog outputs
• 8 test socket pairs (2.3 mm) on the front panel to connect measuring
equipment (for start-up)
• L bus connection
An analog output (signal at the connector and interface module and at the
test socket) can be loaded up to 10 mA and is short-circuit proof for 2 min.
The manufacturer adjusts the outputs as far as offset and gain are
concerned for an ambient temperature of approximately 20° C:
This adjustment is made using 2 potentiometers for each output, which are
not sealed so that they can be re-adjusted in operation (e. g. due to different
ambient temperatures).
The temperature dependency is max. approx. +/-240 µV at a temperature
change of +/-1° C.
Analog output
Output 1
Output 2
Output 3
Output 4
Output 5
Output 6
Output 7
Output 8
Table 5-1 Adjustment potentiometers for analog outputs
The module should be operated for approx. 2 min before any adjustment is
made so that it has time to reach its operating temperature.
The offset adjustment is first made. The value 0.0 (0%) should be output in
the configured software at the connection of the associated function block,
and the associated offset potentiometer should be adjusted until 0 V is
measured.
The output voltage is increased by rotating the potentiometer clockwise.
The gain is then adjusted. The associated analog output should be driven
with 2.0 (200%) (configured software) and the associated offset
potentiometer should be adjusted until 10 V is measured.
The switch-mode power supply causes voltage spikes (these can be
measured up to 100 mV) on the ground cable. They can be suppressed by:
• smoothing at the load input
• low-ohmic load
All of the cables for the output signals are not directly connected at the
module, but via interface modules. The interface modules serve as
mechanical connecting element (screw/plug-in terminals) and toelectrically
adapt the system/plant signals (optional).
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Offset
-R49
-R55
-R61
-R67
-R73
-R79
-R85
-R91
Industry Automation
Gain
-R46
-R52
-R58
-R64
-R70
-R76
-R82
-R88
Hardware - SIMADYN D
Edition 12.2004
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