Eurotherm 590+ Series, Product Manual, Page: 244 / 308

11-8
Technical Specifications
590+ Series DC Digital Converter
Terminal Definitions (Digital/Analog Inputs & Outputs)
User inputs/outputs are IEC1131 compliant.
Digital Input Rated Voltage:
• Off Region:
input voltage
input current
• Transition Region:
input voltage
input current
• On Region:
input voltage
input current
Input Impedance
Sample Time
24V dc
minimum -3V, maximum 5V
minimum not defined, maximum 15mA
minimum 5V, maximum 15V
minimum 0.5mA, maximum 15mA
minimum 15V, maximum 30V
minimum 2mA, maximum 15mA
4.7k
Ω
10ms
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. Digital Output Voltage
Digital Output Current
Output Update Rate
Output Impedance
Source/Sink
Rated Current
Temporary Overload
Overload Protection
Overload Recover
Reverse Voltage Protection
Operating Voltage
Off state leakage current +24V dc
+100mA maximum source
10ms
Negligible up to 50mA load, short circuit protection provided.
Source
0.1A
None
Indefinite
Automatic
Yes
<30V dc
<0.4mA
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. Input Resolution
Output Resolution
Input Impedance
Input Impedance Limit
Maximum Input Sample Rate
Input Overload Capability
Output Capacity
Output Update Rate
Output Overdrive Capability
12 Bit plus sign, i.e. 10mV = 0.025% of full scale deflection
10 Bit plus sign, i.e. 10mV = 0.1% of full scale deflection
100k
Ω with a 1ms filter for Analog I/P (A3) and 2ms for
others.
≥ 10k Ω (signal range -10V to +10V)
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