ACA-20PC Series www.murata-ps.com Digital, LED-Display AC Ammeters with Built-in Current Transformers Now AWviariela Lbelea dw CitThs C® US E156931 Murata Power Solutions' new ACA-20PC Series are the fi rst digital ac ammeters to incorporate FEATURES 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 Built-in Current Transformers for direct measurement two supply terminals, and you’re instantly measuring ac currents over one of four ranges (0-2A of 0 to 2/20/50/100 Amps with 1mA resolution, 0-20A with 10mA resolution, or 0-50A and 0-100A with 100mA resolu- Functionally complete: tion). Absolutely no external components, such as expensive low-value shunts or 5A "donut" On-board current transformers CT’s, are required. Scaling/interface circuitry Meters are ac powered (120/220Vac @ 50/60Hz) or dc powered (+5-40V) and impose Precision A/D converters Bright red LED displays minimal loads (50mA max. and 120mA max., respectively) on their supplies. All models employ auto-zeroing circuits, precision bandgap references, and super stable thin-fi lm resistors for 8 different models unsurpassed accuracy (±0.15%FS) and stability. Subminiature, 1.38" x 0.88" package The functionally complete ACA-20PC ammeters provide all the scaling/interface circuitry to Easy-to-read, 0.37"/9.4mm digits mate the CT’s output to a precision (3½ digit) A/D converter. The A/D's output goes directly to AC powered models 85-264Vac @ 50/60Hz 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 "Self-powered" 85-264Vac, 2A and 20A models feature linear regulators. AC-powered models can be powered by the same ac supply whose current built-in load connections they are monitoring. The 2A and 20A, 85-264Vac, 50/60Hz ("AC1") models feature additional +5-40V dc powered models on-board terminal blocks to supply power to the external load. All models provide 2000Vdc iso- 2000V isolation; approvals to UL/cUL/IEC/61010-1 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. + 3½ DIGIT A/D CONVERTER – +V –V LED DISPLAY RMS-to-DC CONVERTER POWER CONVERTER (L1) BUILT-IN CURRENT A B Figure 1. ACA-20PC Series simplifi ed schematic TRANSFORMER TB1 MEASURED AC CURRENT LIMITED For full details go to LOAD CURRENT AC OR DC SUPPLY www.murata-ps.com/rohs www.murata-ps.com/support MPM_ACA_20PC.C01 Page 1 of 6

ACA-20PC Series Digital, LED-Display AC Ammeters with Built-in Current Transformers Performance/Functional Specifi cations Typical at TA = +25°C, unless otherwise noted. ➀ Full-Scale Current (45-450Hz) ➁ Min. Typ. Max. Units Physical/Environmental ACA-20PC-1-XXX-XX – – 1.999 Amps Case Material Polycarbonate ACA-20PC-2-XXX-XX ➂ – – 19.99 Amps Dimensions 1.38”W x 0.88”H. Depth is model depen- dent (see mechanical specifi cation) ACA-20PC-3-XXX-XX – – 50.0 Amps Weight: ACA-20PC-4-XXX-XX – – 100.0 Amps ACA-20PC-1-XXX-XX 1.1 ounces (31 grams) DMS-30798-C – – 30.0 Amps ACA-20PC-2-XXX-XX 1.1 ounces (31 grams) Overcurrent Rating ➁ 1.5 x rated full-scale current ACA-20PC-3-XXX-XX 1.3 ounces (37 grams) Performance ACA-20PC-4-XXX-XX 1.5 ounces (43 grams) Sampling Rate 2.5 reading per second DMS-30798-C 1.0 ounces (28 grams) Accuracy ➁ ±0.15%FS ±6 Counts Measurement Type Sine wave input, full-wave averaging, rms calibrated ➀ The ACA-20PC-1-AC1-RL and ACA-20PC-2-AC1-RL have 4-position on-board terminal blocks. All other models have 2-position terminal blocks. Temperature Drift (0 = +60°C) – ±0.2 ±0.4 Cnts/°C ➁ Specifi ed full-scale currents are those passing through the built-in CT's Zero Reading (Vin = 0 Volts) “–001” “000” “001” Counts primary(load) circuit, over the frequency of 45-450Hz. The Overcurrent Rating Dielectric Withstanding Voltage 2000 – – Vdc is a continuous rating that applies to the measured ac load current. It does not apply to any circuitry external to the meter. Accuracy is guaranteed to the UL/IEC61010-1 Measurement category II rated current. Power Supply Voltage ➄ ➁ For the ACA-20PC-2-AC1-RL, if the load is connected to the meter's on-board ACA-20PC-X-AC1-RL (47-99Hz) 85 120 264 Vac 4-position terminal block, the 20A full scale range requires 12AWG solid copper wire on all connections. If 14AWG solid copper wire is used, the current ACA-20PC-X-DC1-RL +4.75 – +40 Vdc should be limited to 15A. See Figure 3. Power Supply Current ➃ ➃ All specifi ed maximum power supply currents are steady-state values. AC-powered models can draw higher surges at initial turn-on. ACA-20PC-X-AC1-RL (47-99Hz) – 30 50 mA ➄ Maximum reverse polarity protection on "DC1" models is –40Vdc. ACA-20PC-X-DC1-RL – +8 +12 mAdc Power Supply Terminal Block ACA-20PC-1-AC1-RL and ACA-20PC-2-AC1-RL Ordering Information (2A and 20A ac-powered models with 4-position terminal blocks): ACA - 20PC - 1 - AC1 - RL - L - C Wire Size and Type 12-20AWG (solid), 14-20AWG (stranded) (45-450Hz) RoHS Insulation Strip Length 0.25 inches Input Range: Leaded CT (100A model) Screw Tightening Torque 4.4 lb·in (0.5N·m) ±20% 1 = 1.999A LED Color: Maximum Rated Current 20A with 12AWG solid wire; 15A with 2 = 19.99A RL = Red Standard 14AWG solid or stranded wire 3 = 50.0A BL = Blue Standard Maximum Rated Voltage 630V (VDE 0110-V. Group 2) 4 = 100.0A Power Supply: PGL = Green Standard 250V (VDE 0110-V Group 3) AC1 = 85-264Vac@50/60Hz ACA-20PC-X-XXX-XX DC1 = +5-40Vdc (All other ac or dc-powered models with 2-position terminal blocks): Wire Size and Type 16-24AWG (solid or stranded) See www.murata-ps.com/dpm-availability for model-specifi c availability. Insulation Strip Length 0.25 inches Screw Tightening Torque 2.2 lb·in (0.25 N·m) ±20% DMS-30798-C: 30Amp model with a wire lead CT and “-AC1” power supply specifi cations. See Mechanical section for dimensions. Display Display Type and Size 3½ digit, 0.37"/9.4mm high LED Accessories: DMS-20-CP Panel cutout punch Overrange Indication “1_ _ _” A DMS-BZL4-C bezel assembly with sealing gasket is supplied with each ammeter. Decimal Point Fixed, model dependent Physical/Environmental Operating Temperature 0 – +60 °C Storage Temperature –40 – +75 °C Humidity (non-condensing) 0 – 95 % www.murata-ps.com/support MPM_ACA_20PC.C01 Page 2 of 6

ACA-20PC Series Digital, LED-Display AC Ammeters with Built-in Current Transformers TECHNICAL NOTES designations. Also, ac-powered ACA-20PC ammeters do not include IMPORTANT! To ensure safe and reliable operation, ACA-20PC or require a connection to earth/chassis ground. However, in many ammeters must be installed and serviced by qualifi ed technical applications, external ac loads which are connected directly to the personnel. Contact Murata Power Solutions if there is any doubt ACA-20PC’s built-in auxiliary terminal blocks must be wired with regarding ammeter installation and/or operation. proper polarity and connected to earth/chassis ground. 1. Measurement Type: ACA-20PC ac ammeters employ a full-wave- 5. Connector Torque Ratings: It is important to tighten TB1's screw rectifi ed, average responding, rms-calibrated circuit to measure the terminals to their rated torque specifi cations of 4.4 pound-inches stepped-down output of their on-board, L1 current transformer (CT) . (0.5Nm) for four-terminal ammeters (ACA-20PC-1-AC1-RL and ACA- Stated accuracy specifi cations are measured using a sine-wave cur- 20PC-2-AC1-RL), and 3.6 pound-inches (0.4Nm) for two-terminal rent at or close to the specifi ed full scale input level, at nominal line ammeters. Proper tightening will minimize connector losses and frequency. ensure safe, reliable operation. 2. Calibration: Periodic recalibration of ACA-20PC ammeters is not 6. 100 Amp Model (ACA-20PC-4-XXX): This model’s built-in current required under normal, indoor operating environments. If user transformer requires a larger panel cutout width dimension. See calibration is necessary, it should be performed by qualifi ed technical Mechanical Specifi cations for more information. personnel. Calibration is performed with potentially lethal voltages 7. DC-Powered Models: DC-powered models draw minimal supply applied to the ACA-20PC and its associated wiring, with the specifi ed currents and in most applications can be fused according to the full-scale current fl owing through the ammeter’s built-in current supply wire’s maximum amperage rating. However, be sure to check transformer. and comply with all applicable codes and regulations to ensure A plastic, fully insulated adjusting tool must be used to access the proper installation and operation. recessed calibration potentiometer located on the back of the meter 8. Isolation: The on-board CT (L1) provides a minimum 2000Vdc (see Mechanical Specifi cations). Contact Murata Power Solutions if isolation between the current-carrying conductor passing through its additional information is required regarding calibration, setup, or any primary circuit and the ammeter supply voltage connected to TB1. Of other technical issue pertaining to the ACA-20PC. course, this isolation rating only applies to applications in which the 3. Wire Gauges and Fusing: Wires specifi ed in the Functional Specifi - load wiring (i.e., the wire passing through the CT’s center hole) does cations section must be used for making connections to ACA-20PC not connect directly or indirectly to TB1-A or TB1-B. Series ammeters. All power-supply and load wiring must be rated for the supply voltages and currents they will conduct and must comply with any code or application-mandated requirements pertaining to PANEL INSTALLATION the user’s specifi c installation. ACA-20PC Series ammeters are not internally fused. Special attention All connections to ACA-20PC Series ammeters must be made must be paid to ACA-20PC-1-AC1 (0-2A range) and ACA-20PC-2-AC1 after the ammeter is securely attached to the panel and with all (0-20A range) ac-powered models when their built-in auxiliary termi- load and supply voltages de-energized (off). nal block connections on TB1 are used to supply power to an external Care should be exercised when passing the load-carrying conduc- load. The input supply wires connected to both the ammeter and the tor through the meter’s built-in CT—particularly when larger-gauge load must be fused according to the current rating of the wire gauge conductors are used. The position of the installed wire should be being used, in accordance with applicable regulatory codes, but not such that minimal forces are applied to the built-in CT, TB1, or to to exceed TB1’s maximum 20A rating. If TB1 is not used to supply the ammeter itself. In high-vibration environments, adequate strain power to external loads, a 0.25A/250V time delay/time lag fuse must reliefs be used for all load and supply wiring. be used. To ensure a secure panel-mount installation, Murata Power Solutions ACA-20PC-3-AC1 (0-50A range, ac-powered) and ACA-20PC- 4-AC1 recommends using the DMS-BZL4 bezel assembly (with sealing (0-100A, ac-powered) models’ TB1 is to be used only for powering gasket) supplied with each ammeter. Also, please note that the ACA- the ammeters’ internal circuitry; it must not be used to supply power 20PC-4-XXX 100A oversize CT requires a larger panel-cutout width to external loads. The supply wires feeding these models must be of 1.350" (34.3mm). See Mechanical Specifi cations for detailed fused with a 0.25A time delay/time lag fuse, in accordance with cutout and ammeter dimensions. applicable regulatory codes. Following the four-step sequence shown in Figure 2 below—being Wire insulation must be stripped to within ±10% of the stated dimen- careful not to apply excessive force or twisting motions—insert the sions, and wires should be inserted into TB1 such that their insulation ammeter into the panel opening. When using the DMS-BZL4 bezel is not pinched by the screw terminal. assembly, install its sealing gasket so it is positioned between the 4. AC Supply Polarity and Grounding: The two ac supply inputs, ammeter’s front fl ange and panel front surface (see Mechanical TB1-A and TB1-B, on ac-powered ammeters are not in themselves Specifi cations). Be sure to use and securely tighten all four screws polarity sensitive, that is, they have no internal "AC LO" or "AC HI" supplied with the bezel assembly. www.murata-ps.com/support MPM_ACA_20PC.C01 Page 3 of 6

ACA-20PC Series Digital, LED-Display AC Ammeters with Built-in Current Transformers Step 1. Step 2. Step 3. Step 4. Panel Figure 2. Panel Installation TYPICAL WIRING DIAGRAM First pass and carefully dress one external load wire through the FUSED on-board CT (L1). Then connect the ac supply and load wires to TB1 AC POWER as shown. If required, verify that correct line-power polarities are SUPPLY applied to the external load (see Technical Note 4). Ensure all wires ACA-20PC-X-ACX are stripped and terminals torqued correctly. For proper operation, pass only one load wire through the on-board CT’s center hole. TO AC LOAD FUSED FUSED 85-264Vac 85-264Vac POWER POWER ACA-20PC-1-AC1-RL AC SUPPLY Figure 4. All Other AC-Powered Models + ACA-20PC-2-AC1-RL FUSED DC POWER SUPPLY – ACA-20PC-X-DCX 85-264Vac TO LOAD TO LOAD Figure 3. 2A and 20A, 85-264V AC-Powered Models With Auxilliary Load Connections + – TO AC LOAD AC SUPPLY Figure 5. All DC-Powered Models www.murata-ps.com/support MPM_ACA_20PC.C01 Page 4 of 6

ACA-20PC Series Digital, LED-Display AC Ammeters with Built-in Current Transformers MECHANICAL SPECIFICATIONS ACA-20PC-1 & 2-AC1-RL ACA-20PC-1 & 2 2A and 20A, 85-264V ac-powered models 2A and 20A, all other models Hole Diameter: Hole Diameter: 0.27 (6.9) min. 0.27 (6.9) min. 2.01 2.01 (51.1) (51.1) 1.00 1.00 0.040 (25.4) 0.040 (25.4) (1.02) (1.02) 0(1.0.0420) ((1313.3.533..0018)) 0(1.0.0420) ((0202.0.288..3048)) 0(1.0.0420) ((1313.3.533..0018)) 0(1.0.0420) ((0202.0.288..3048)) 1.32 1.32 (33.5) (33.5) FRONT VIEW BACK VIEW FRONT VIEW BACK VIEW CAL. CAL. ACA-20PC-3 Series ACA-20PC-4 Series 50A models 100A models with pc-board mounted CTs * *THIS MODEL REQUIRES A PANEL 1.33 CUTOUT WIDTH OF 1.350" (34.3MM) (33.8) Hole Diameter: 0.35 (8.9) min. Hole Diameter: 0.55 (14.0) min. 2.12 2.53 (53.8) (64.3) 0(1.0.0420)(12.50.40) 0(1.0.0420)(12.50.40) 0(1.0.0420) ((1313.3.533..0018)) 0(1.0.0420) ((0202.0.288..3048)) 0(1.0.0420) ((1313.3.533..0018)) 0(1.0.0420) ((0202.0.288..3048)) (13.95.14) (13.33.52) FRONT VIEW BACK VIEW FRONT VIEW BACK VIEW CAL. CAL. wMewchawnic.aml Diumrenasitoans-: Ipncshe.sc (momm) T/olseruanpceps: o2 PrLt DEC ±0.02 (±0.51), 3 PL DEC ±0.010 (±0.254) MPM_ACA_20PC.C01 Page 5 of 6

ACA-20PC Series Digital, LED-Display AC Ammeters with Built-in Current Transformers BEZEL INSTALLATION AND RECOMMENDED DRILL AND MECHANICAL SPECIFICATIONS, CONTINUED PANEL CUTOUT #2-56 INSERT 0.187 ACA-20PC-4-XXX-L (100A model) 0.156 (3.96) DEEP (4.75) DMS-30798-C (30A model) OD: 100A Model: 1.18 (30.0) 1.280 DMS-30798-C (30A): 0.87 (22.0) FRONT VIEW (32.51) ID: 100A Model: 0.58 (14.7) DMS-30798-C (30A): 0.35 (8.9) 1.826 (46.38) 0.116 (2.95) Lead Length: INTERNAL CORNER RADII: 2.0 (50.5) min. 0.032 (0.81) MAX. 1.07 0.838 PANEL CUTOUT (27.18) (21.29) 1.00 0.040 (25.4) (1.02) 0.093 (2.362) DIA 1.336 (33.93)* 0.145 (3.68) (4 REQUIRED) 1.626 (41.30) 0(1.0.0420) (13.33.00) 0(1.0.0420) (02.08.30) * 1.350 (34.3) for ACA-20PC-4-XXX 100A model 1.38 0.88 (35.1) (22.4) with pc-board mounted CTs. 1.14 (29.0) et k FRONT VIEW BACK VIEW as G CAL. ® L E Z E B 1. Description of safety marks: Caution, risk of electrical shock Caution, risk of danger Equipment is protected throughout by double or reinforced insulation 2. Cleaning Instructions: Gently clean with dry cloth only. 3. Caution: if the equipment is used in a manner not specifi ed by Murata Power Solutions, the protection provided by the equipment may be impaired. This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. © 2015 Murata Power Solutions, Inc. www.murata-ps.com/support MPM_ACA_20PC.C01 Page 6 of 6

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M urata: ACA-20PC-4-AC1-RL ACA-20PC-4-DC1-RL ACA-20PC-3-DC1-RL ACA-20PC-3-AC1-RL ACA-20PC-1-AC1-RL-C ACA-20PC-1-DC1-RL-C ACA-20PC-2-AC1-RL-C ACA-20PC-2-DC1-RL-C ACA-20PC-3-AC1-RL-C ACA-20PC-3- DC1-RL-C ACA-20PC-4-AC1-RL-C ACA-20PC-4-DC1-RL-C DMS-30798-C ACA-20PC-1-AC1-RL ACA-20PC-2-AC1- RL ACA-20PC-2-DC1-RL ACA-20PC-1-DC1-RL ACA-20PC-4-AC1-RL-L-C ACA-20PC-2-AC2-RL