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Model 1250B:
Synchro (Selsyn®) - Rotary Position Indicator

The Model 1250B provides highly accurate rotary position indication, with interfaces to SCADA, PLC’s, and computers.

Applications

Applications

For many years this versatile instrument has been a Utility and Industrial standard for measurement of:

  • Head & Tailwater Level
  • Stream or Pond Level
  • Spillway Gate Position
  • Governor Limit & Position
  • Valve Position
  • Fish Wier Position

Capabilities

Capabilities

This sophisticated instrument can help solve tough position measurement problems

  • Non-Linear Conversion
  • Multi-Turn Measurements
  • Interfaces with PLC’s and PC-Based SCADA Systems
  • Programmable Alarm or Control Outputs
  • MODBUS & ASCII Protocols

Features/Benefits

Features

  • Absolute Position Feedback
  • Proportional Analog Output Signal
  • Programmable Hi/Lo Relay Limits
  • RS-485 Multi-drop Communication
  • RS-232 ASCII Serial Communication
  • Programming via Serial Port

Benefits

  • Highly Accurate
  • Easy Automation Interface
  • Proven Reliability
  • Maintenance Free
  • Retrofit to Older Systems
  • Simple Programming
  • Cost Effective
  • Highly Visible LED Display

Specs

Specifications


GENERAL
Input Signal Synchro (5 wire) 90V maximum
Resolution +/-0.001% of full scale or 6 arc minutes
Accuracy +/-0.02% of full scale maximum (.01% typical)
Temperature Drift +/- 0.01 % per °C
Operating Temp. 0° to 55° C (standard)
Humidity 10% - 90% non condensing
Weight 24 ounces
Voltage 117/234 +/- 10%
Frequency 47 - 63 Hz
Load 8 Watts, maximum
DISPLAY
Type 5-digit LED
Digit Height 0.56 inch (14.2 mm)
Viewing distance 23 feet
Decimal point Field programmable (scaled modes only)
OPTIONAL ANALOG OUTPUT
Outputs +/- 1 mA, 0-1mA, 0-2mA, 4-20mA (requires external loop power)
Compliance 10 Volts (0-1mA, +/- 1mA, 0-2mA) 500 Ohms (4-20mA)
Non-Linearity +/- 0.1% of full scale
Resolution 12 bits (+/- 0.025% of full scale)
OPTIONAL HI/LO RELAYS
Contact Rating 3A @ 125/250 VAC (resistive), 30 VDC



Panel cut out min.: 1.653 (42mm) x 3.543 (90mm)
(+2 / -0 mm)

Panel thickness: 0.1 (2.7mm) to 0.19 (5.0mm)

OPTIONAL ACCESSORIES
Model 1292 - Selsyn Synchro Transmitter
Model 1292K -Transmitter w/bracket
Model 1292KS - Transmitter w/bracket & surge protection circuit
Model 1293 - Flexible coupling shaft
Model 1945 - 15 VDC Loop Power Supply (For 4-20mA Analog Output)

Order

Ordering Information

1250B-U-W-X-Y-777 = options, see below

OPTIONS
U = Output Options:   0 (0-1mA)   2 (0-2 mA)
    1 (+/-1mA)   4 (4-20mA)
W = Control:   R - Hi/Lo Relay Limits
X = Input Options   I - Input Isolation
Y = Comm. Options:   S - RS-232   M - RS-485 MODBUS
    PB - Parallel Data (BCD)    
ZZZ = Line Voltage:   120 (120 VAC) or 240 (240 VAC)

Data Sheet

Download Reference

PDF - Data Sheet (PDF)