Basler BE1-CDS220, Инструкция по эксплуатации

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BE1-CDS220 Input And Output Functions 3-9
CONTACT SENSING INPUTS
BE1-CDS220 relays have eight contact sensing inputs to initiate BE1-CDS220 relay actions. These inputs
are isolated and require an external wetting voltage. Nominal voltage(s) of the external dc source(s) must
fall within the relay dc power supply input voltage range. To enhance user flexibility, the BE1-CDS220
relay uses wide range ac/dc power supplies that cover several common control voltage ratings. To further
enhance flexibility, the input circuits are designed to respond to voltages at the lower end of the control
voltage range while not overheating at the high end of the control voltage range.
Energizing levels for the contact sensing inputs are jumper selectable for a minimum of 13 Vdc for 24 Vdc
nominal sensing voltages, 26 Vdc for 48 Vdc nominal sensing voltages, or 69 Vdc for 125 Vdc nominal
sensing voltages. See Table 3-4 for the control voltage ranges.
Each BE1-CDS220 is delivered with the contact-sensing jumpers installed for operation in the lower end
of the control voltage range (pins 1 and 2 shorted). If the contact sensing inputs are to be operated at the
upper end of the control voltage range, the jumpers must be changed to pins 2 and 3 shorted or
completely removed. See Section 3, Installation for details on how to set the jumper positions in the
contact sensing input circuits.
Table 3-4Contact Sensing Turn-On Voltage
Turn-On Range Nominal Control
Voltage
Pin 1 - Pin 2 Pin 2 - Pin 3
24 Vdc 13-19 Vdc N/a
48/125 Vac/dc 26 to 38 V 69 to 100 V
125/250 Vac/dc 69 to 100 V 138 to 200 V
Digital Input Conditioning Function
The relay scans the inputs for status 24 times per cycle. When operating on a 60-hertz power system, this
results in the input status being sampled every 0.7 milliseconds (0.8 milliseconds on 50-hertz systems).
The relay uses digital contact recognition and debounce timers that are user settable to condition the
signals applied to the inputs. The user can adjust these parameters so that the optimum compromise
between speed and security can be attained for the specific application. The digital input conditioning
function is evaluated every quarter cycle.
If the sampled status of the monitored contact is detected to be closed for the recognition time, the logic
variable changes from an open (logic zero or FALSE) state to a closed (logic one or TRUE) state. Once
the contact closure has been recognized, the logic variable will remain in the closed state until the
sampled status of the monitored contact is detected to be open for longer than the debounce time. At this
point, the logic variable will change from a closed (logic one or TRUE) state to an open (logic zero or
FALSE) state.
Setting the Digital Input Conditioning Function
Settings and labels for the digital input conditioning function are set using BESTCOMS. Alternately,
settings may be made using the SG-IN ASCII command.
Each of the inputs has two settings and three labels. The settings are Recognition Time and Debounce
Time. The labels include a label to describe the input, a label to describe the Closed State, and a label to
describe the Open State. Labels are used by the BE1-CDS220’s reporting functions.
To edit the settings or labels, select Inputs and Outputs from the Screens pull-down menu. Then select
the Inputs 1-4 or Inputs 5-8 tab. Refer to Figure 3-5.