Model 1945
The Model 1945 is a 15 Volt DC, regulated Power Supply. The Model 1945 is only used with INCON Panel Meters that were ordered with the 4 to 20 milliamp analog output option.
Applications
MI/RFI
The 1945 power supply has inherently low conducted and radiated noise levels for most system applications that meet the requirements of FCC Docket 20780 for Class A equipment and VDE 0871 for Class A equipment without additional noise filtering.
COOLING
Convection cooling is adequate where nonrestricted airflow is available. When operating in a confined area, moving air or conduction cooling is recommended.
AC CONNECTIONS & FUSING
The five-wire input to the 1945 provides four voltage ranges:
100/ 120/220/230-240 +10% to -13%. See chassis AC connection
table (Figure 1) for the jumpering requirements. Extended
low line tolerance provides additional drop out margin in
areas where line voltages are marginal. Inputs must be fused.
Note: This product is a Class 1 power supply and requires the chassis to be connected to earth ground at end application.
*Note: Use 700 °C iron for soldering input connections.
**Note: Tolerance for 230 VAC operations is +15% to -10%
Features
- VDE transformer construction – Full rated to 50 °C
- + 0.05% regulation - Foldback/current limit
- T.C. burned-in to MIL - 883 Lev. B
- UL recognized/CSA certified
- Chassis notched for AC input
- Over Voltage Protection on 15V output
- 100/120/220/230-240 VAC power
- Industry standard size
Specifications
| |
| AC Input: |
100/120/220/230-240 VAC, ±10%, 47-63Hz (Derate output current 10% for 50 Hz operation). Fuse at: 0.5 / 0.25 amps for 100 -120 / 220 - 240 VAC. See Figure 1 – AC Input connection table, for jumpers required |
| DC Output: |
12 - 15V (±5%) Adjustable |
| Line Regulation: |
±0.05% for a 10% line change |
| Load Regulation: |
±0.05% for a 50% load change |
| Output Ripple: |
5.0 mV PK-PK maximum |
| Transient Response: |
≤ 50µs for a 50 to 100 % load change |
| Short Cicuit and Overload
Protection: |
Automatic current limit / foldback |
| Over Voltage Protection: |
Not Available |
| Remote Sensing: |
Not Available |
| Stability: |
±0.3% for 24 hour period after 1 hour warm-up |
| Temperature Rating: |
0 °C to 50 °C full-rated derated linearly to 40% at 70 °C |
| Temperature Coefficient: |
±0.03%/°C maximum |
| Efficiency: |
55% |
| Vibration: |
Per ML-STD-8100 method 514.3 category 1 procedure I |
| Shock: |
Per ML-STD-8100 method 516.3 procedure III |
| Weight: |
2 lbs (1 KG) [Shipping: 3 lbs (1.5 Kg)] |
Safety Specifications
The 1945 power supply is designed to meet or exceed requirements
of the following specifications: IEC 380, IEC 435, VDE 0730
Part 2, VDE 0804, ECMA-57, CEE 10 Part 2P, UL 1012, CSA 22.2
No. 143, CSA 22.2 No. 154. Specifically, field terminal to
terminal spacing is 5.25 mm with 9.0 mm creepage to other
metal. Leakage current is less than 5.0 mA and dielectric
withstanding voltages are 3750 VAC input to chassis. 3750
VAC input to output and 300 VDC output to chassis.
AC Input Wiring Connections
