Basler BE1-CDS220, Instruction Manual

Page: 28 / 476

1-16 General Information BE1-CDS220
Calculated Values and Accuracy
Demand
Range: 0.1 to 1.5 nominal
Type: Thermal, Block, Sliding Block
Accuracy: ±1% of reading, ±1 digit at 25
°
C
Temperature Dependence:
≤
±0.02% per
°
C
Interval: 1 to 60 minutes
Real-Time Clock
Accuracy at 25 C
Free Running: 1 second per day
With IRIG Synchronization:
±
2 milliseconds per day
Resolution: 1 millisecond
Date and Time Setting Provisions: Front panel, communications port, and IRIG. Leap year
correction provided. Daylight savings time correction available.
Clock Power Supply Holdup
Capacitor: 8 to 24 hours, depending on conditions
IRIG
Standard: 200-98, Format B002
Input Signal: Demodulated (dc level-shifted digital signal)
Logic-High Voltage: 3.5 Vdc, minimum
Logic Low Voltage: 0.5 Vdc, maximum
Input Voltage Range: ±20 Vdc, maximum
Burden: Nonlinear, approximately 4 k
Ω
at 3.5 Vdc,
approximately 3 k
Ω
at 20 Vdc
Contact Inputs
Recognition Time: Programmable from 4 to 255 milliseconds
87 Differential Functions
Restrained Differential (87RPU, 87RT)
Pickup Accuracy
5 A Current Sensing: ±4% or ±75 mA, whichever is greater
1 A Current Sensing: ±4% or ±25 mA, whichever is greater
Response Time (See Figure 1-9) : <2 cycles at 5 times pickup
<3 cycles at 1.5 times pickup
Unrestrained Differential (87UT)
Pickup
Accuracy
5 A Current Sensing: ±3% or ±75 mA, whichever is greater
1 A Current Sensing: ±3% or ±25 mA, whichever is greater
Response Time (See Figure 1-9) : <1 cycle at 5 times pickup
<2 cycles at 1.5 times pickup
NOTE
All timing specifications are for the worst-case response. This includes output
contact operate times and standard BESTlogic operation timing, but excludes
input debounce timing and non-standard logic configurations. If a nonstandard
logic scheme involves feedback, then one or more BESTlogic update rate delays
must be included to calculate the worst-case delay. An example of feedback is
virtual outputs driving function block inputs or other higher numbered virtual
outputs, or function block outputs driving function block inputs. For more
information, see Section 7, BESTlogic Programmable Logic.