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ACA-20PC Series
vailable
s
Lead CT
Digital, LED-Display AC Ammeters with
Built-in Current Transformers
Now
with
A
Wire
C
?
US E156931
FEATURES
?
? Built-in Current Transformers for direct measurement
of 0 to 2/20/50/100 Amps
?
? Functionally complete:
On-board current transformers
Scaling/interface circuitry
Precision A/D converters
Bright red LED displays
8
? ? different models
?
?
? Subminiature, 1.38" x 0.88" package
? Easy-to-read, 0.37"/9.4mm digits
?
? AC powered models 85-264Vac @ 50/60Hz
?
? "Self-powered" 85-264Vac, 2A and 20A models feature
built-in load connections
?
? +5-40V dc powered models
?
? 2000V isolation; approvals to UL/cUL/IEC/61010-1
DATEL's new ACA-20PC Series are the ?rst digital ac ammeters to incorporate on-board current
transformers (CT’s), and they are amazingly easy to use. Simply pass the current-carrying load
wire through the ACA-20PC’s on-board CT, apply power to the meter's two supply terminals,
and you’re instantly measuring ac currents over one of four ranges (0-2A with 1mA resolu-
tion, 0-20A with 10mA resolution, or 0-50A and 0-100A with 100mA resolution). Absolutely no
external components, such as expensive low-value shunts or 5A "donut" CT’s, are required.
Meters are ac powered (120/220Vac @ 50/60Hz) or dc powered (+5-40V) and impose
minimal loads (50mA max. and 120mA max., respectively) on their supplies. All models employ
auto-zeroing circuits, precision bandgap references, and super stable thin-?lm resistors for
unsurpassed accuracy (±0.15%FS) and stability.
The functionally complete ACA-20PC ammeters provide all the scaling/interface circuitry to
mate the CT’s output to a precision (3? digit) A/D converter. The A/D's output goes directly to
drivers for the meters’ large (0.37"/9.4mm digit height), easy-to-read, LED displays. AC-pow-
ered units have on-board AC/DC converters, and wide-range dc-powered units have on-board
linear regulators. AC-powered models can be powered by the same ac supply whose current
they are monitoring. The 2A and 20A, 85-264Vac, 50/60Hz ("AC1") models feature additional
on-board terminal blocks to supply power to the external load. All models provide 2000Vdc iso-
lation between the measured ac current and their power supply, and all are UL/CSA recognized.
Each meter is housed in a subminiature, 1.38" x 0.88", epoxy-encapsulated package. Total
behind-the-panel installation depth is approximately 2 inches.
SIMPLIFIED SCHEMATIC DIAGRAM
CAL.
+
3? DIGIT
A/D CONVERTER
–
RMS-to-DC
CONVERTER
(L1)
+V
POWER
CONVERTER
–V
LED DISPLAY
BUILT-IN
CURRENT
TRANSFORMER
A
B
Figure 1. ACA-20PC Series simpli?ed schematic
TB1
　
For full details go to
www.murata-ps.com/rohs
MEASURED AC
LOAD CURRENT
CURRENT LIMITED
AC OR DC SUPPLY
www.murata-ps.com/support
MPM_ACA_20PC.B12 Page 1 of 6
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ACA-20RM-0-AC4-RL-C 功能描述:数字面板表 199.9mAInput TrueRMS-AC RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-1-AC3-RL-C 功能描述:数字面板表 1.99AInput TrueRMS-AC RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-1-AC4RL 功能描述:数字面板表 3 1/2 digit red ammeter RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-1-AC4-RL 制造商:Murata Power Solutions 功能描述:True-RMS-AC Ammeters With Built-In CT
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