參數(shù)資料
型號： 20ALMDC-AXXX-8
英文描述： TRIP AMPLIFIER DC
中文描述： 行直流放大器
文件頁數(shù)： 1/1頁
文件大?。?/td> 37K
代理商： 20ALMDC-AXXX-8
The 20ALM is an input loop powered trip amplifier,
deriving its power from the input signal
I
High or low alarm option
I
Low voltage drop
I
Setpoints available on front panel as 0.4 to 2V signal (4 to
20mA)
I
LED indication of alarm
I
Unique low cost solution
Loop Powered Trip
Amplifiers
20ALM
Description
The 20ALM is a 4-20mA loop powered trip amplifier. The
device derives its power from the input signal and therefore
requires no external power supply.
The output of the 20ALM is a single pole, normally open, solid state
relay which can be configured to close either above or below the
adjustable setpoint. The switched output can be connected to any
potential within 1kV of the transmitter supply, while transients of
2.5kV can be withstood.
The relay is designed to switch AC or DC.
The trip amplifier is typically used to activate a warning or control
system override when a sensor output goes above or below a pre-set
limit. Alternatively, the unit can be used for simple on/off control,
having a built in switching hysteresis.
The device is housed in an ultra-compact DIN-Rail mounted
enclosure, only 18mm wide.
Recommended operating conditions
Input current
Relay contact voltage
Relay current (max) 300mA @ 24Vdc – 130mA @ 110Vac
Output resistance 5
(on) 24V type – 24
on 110Vac type
4-20mA
24Vac/dc or 110Vac
Environmental conditions
Storage temperature
Operating ambient
Relative humidity
-40-70C
0-55C
0-90%RH
Options and ordering codes
20ALM
AXXX
–
–
8
115VAC
Options
115Vac rated contacts
115VAC
24Vac/dc rated contacts
DC
L
L
L
4-20mA
3
4
1
2
N.O. or N.C. solid
state relay output
3.4V
Dimensions
Specifications
1 2
3 4
L
L
L
L
L
L
63mm
5
1
Connection details
1. Relay output -ve
2. Relay output +ve
3. Input channel +ve
4. Input channel -ve
Parameter
Supply voltage
Supply current
Full scale volt drop
Relay type 1 current
Relay type 2 current
Output resistance ‘ON’
Setpoint hysteresis
Trip point accuracy
Temperature coefficient
Trip point drift
Relay time response
Operating ambient
Relative humidity
Isolation voltage
Surge voltage
Notes
Min
Typ
Max
Comments
Loop power
4mA
20mA
3.5V
315mA
130mA
5
/24
3.4V
At 20mA input
Rated at 24Vdc/ac
Rated at 110Vac
24V/110Vac relay type
Other values available
50μA
±0.25%
±100ppm/C
±100ppm/C
10ms
0C
0%
1kV
55C
90%
2.5kV for 50μS
Transient of 10kV/μS
Setpoint is adjusted by 20 turn potentiometers on the front panel.
Setpoint can be checked by measuring the 0.4 to 2V (4 to 20mA) voltage on the
front panel terminals.
High or low alarm is selectable using internal link.
Closed output contact is indicated by a red LED on the front panel.
AND ORDERING
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