![](https://csdnimg.cn/release/download_crawler_static/89271404/bg11.jpg)
UNIFLOW-200_Instruction_manual_rev06a_EN_2021_06.docx
- 17 -
Pulse/frequency inputs
Signal type (operator selectable)
open collector, potential-free contact - powered from UNIFLOW-200, 12 V/3 mA
active signal (externally powered) – square, unipolar
5 V – max. 5 V, signal level change min. 2 V
15 V – max. 15 V, signal level change min. 5 V
NAMUR
powered from UNIFLOW-200, 8,2 V,
input impedance 1 kΩ,
signal level change, min. 1,5 mA.
frequency range 0…10000 Hz
signal form square, unipolar
signal counting without loss of pulses
Uncertainty of frequency measurement 0.001 % max.
Digital inputs
potential-free contacts, open collector inputs (transistor) or 24 VDC inputs accepted and used as:
static inputs, or
pulse inputs (frequency: 100 Hz max., 50 % fill in ratio)
internal power supply for potential-free inputs: 12 VDC, 6,8 kohm
Analog outputs
output channels with individual galvanic isolation
current range 0-20 mA / 4-20 mA (operator selectable)
resolution 12 bits
load 500 ohm max.
Digital outputs
galvanically isolated open collector (transistor), overvoltage- and overcurrent-protected outputs
type of outputs
o dual state static signal
o flow rate limits
o analog input limits
o repeating dual state input signal with negation/delay
o common alarm output
o pulse signal
o pulse output proportional to totals
o time base
Max. frequency: 100 Hz,
On/off time duration min. 10 msec
load 100 mA, 40 Vdc max.
Digital communication
serial links overvoltage- and overcurrent-protected
mode RS232/RS485/RS422 (operator selectable)
baud rate 1200…38400 baud (operator selectable)
protocol Modbus ASCII and RTU
maximum cable length RS232 15 m
RS485/RS4222 1200 m
10/100 Ehernet protocol: Modbus TCP
USB 1.1 port standard-A receptacle, for data saving to flash drive
Hot/stand-by interface
flow computer status output (to stand-by unit)
change-over voltage-free contact, maximum load: 100 V, 100 mA
operating closed contact (NO)
fault opened contact (NC)