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11-6
Technical Specifications
Terminal Definitions (Digital/Analog Inputs & Outputs)
Digital Input
Digital Output
These outputs are active
high and source current
from the terminal to the
load. Thus the load
must be connected
between the output and
the signal ground. A
free-wheel diode is
included in the output to
protect the output
transistor when
switching inductive
loads such as relays.
Analog Input/Output
Terminal blocks A, B,
and C are located on
the control board each
block being a 9 way
plug-in connector. In
addition to terminal
blocks A, B and C,
terminal blocks G and
H provide connections
when the two option
modules are fitted on
the control board.
Nominal Input Voltage
Maximum Input Voltage
Input Impedance
Sample Time
Threshold
V Input Low
V Input High
Digital Output Voltage
Digital Output Current
Output Update Rate
Output Impedance
Input/Output Resolution
Input Impedance
Maximum Input Sample Rate
Input Overload Capability
Output Capacity
Output Update Rate
Output Overdrive Capability
24V dc
30V dc
4.7kΩ
10ms
16V typical
<6V
>18V
+24V dc
+50mA maximum source
10ms
Negligible up to 50mA load, short circuit protection
provided.
10 Bit plus sign, i.e. 10mV. 0.1% of full scale deflection
100kΩ with a 1ms filter for Analog I/P (A3) and 2ms for
others
10ms (typically), 3ms for Analog I/P 2 (A3)
10%, i.e. maximum recognisable voltage 11V. Analog
Tachogenerator input should be applied to Terminal G3
on Calibration Option Card only
10V at 5mA. Short circuit protected
10ms
10%, i.e. maximum output 11V
590 Series DC Digital Converter
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