BASI BLD-457, Руководство пользователя

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User manual - METER BDL-457
5
The unit is designed for operation in an industrial environment and must not
be used in a household environment or similar.
2. GENERAL CHARACTERISTICS
The BLD-457 meter is equipped with one current input (0-20mA), two voltage inputs (0-
10V and 0-150 mV), one RTD input (Pt 100/500/1000) and one TC input (thermocouple: K, S, J,
T, N, R, B, E). Temperature of cold ends is compensated automatically. RTD and TC inputs are
fully linearised.
It is allowed to use only one input at the same time. Input ranges are described
in the next chapter. Result is showed on 4-digit LED display.
The device can be equipped with two or four relay (or OC type) outputs. Optionally BLD457
can be equipped with active current output, passive isolated current output or active voltage
output. Device
BLD-457 is equipped with RS-485 / Modbus RTU communication interface and
sensor supply output. The meter can be ordered in two power supply versions.
The device has 4 buttons being used for main presets programming. To get high protection
level, the keyboard is mounted under transparent cover. To allow user to change presets without
opening the cover, an IR sensor is mounted.
Remote controller keyboard is equivalent to the device keyboard (Note, that remote
controller is not a part of the BLD-457 set
– it is an additional equipment).
BLD-457 can be used for controlling and regulation of processes need proportional and
threshold control like: temperature processes (heating or cooling), valves controlling or other.
3. TECHNICAL DATA
Power supply voltage
(depending on version)
External fuse (required)
Power consumption
85... 230 ...260V AC/DC; 50 ÷ 60 Hz (separated) or
19... 24 ...50V DC and 16... 24 ...35V AC (separated)
T - type, max. 2 A
max. 33 VA @ 85 ÷ 260V
AC/DC max. 22 VA @ 16V ÷
35V AC max. 13 W @ 19V ÷
50V DC
Current input (20 mA) 0÷20 mA, 4÷20 mA overload protected,
input current is limited to 50 mA (typically)
Current measurement accuracy ± 0.1% @ 25°C; ± one digit (for 0÷20 mA range)
Current input resistance
< 65
W
(typical 30
W
)
Accepted prolonged input
overload 20%
Voltage input (10V range) 0÷5 V, 1÷5 V, 0÷10 V, 2÷10 V
Voltage measurement accuracy ± 0.1% @ 25°C; ± one digit (for 0÷10 V range)
Voltage input resistance > 100 k W ( while maintaining correct polarization )
!