KRAL BEM 500 - Page 7

3 Technical data
3.3 Connection data
Output Designation Unit Value
Pulse output Active pulse source (PNP transistor switches power supply)
Short-circuit proof
Scalable
Output current max. [mA] 20
Load [kΩ] > 1
Signal level at 24V DC power
supply
High [VDC] > 20
Low [VDC] <1
Pulse width can be set High [ms] 2–200
Max. output frequency at pulse
width 2ms
Independent [Hz] 250
Encoder [Hz] 125
Flow direction detection in the Encoder mode possible
Relay output Potential-free change-over contact
Fuse protection by customer required
Nominal load voltage [VAC] 250
[VDC] 30
Switching current, ohmic [AAC/DC] 6
Switching current, inductive [AAC/DC] 2
Switching time max. [ms] 8
Switching cycles min. 30000
3.3.5 Modbus interface
Designation Unit Data/value
Interface type
o RS 232 (SLAVE)
o RS 485 (SLAVE)
Baud rate [Bd] 9600
Data format 8N1 (8 data bits, no parity, 1 stop bit)
Protocol Modbus RTU
Processor cycle time [ms] 20
Operating instructions
OIE 12en-GB Edition 2020-03
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