SD/SA/SR340 Dual Speed Ratio Meters RPM, Speed ratio, Reciprocal speed, sum/differential speed-(2)encoders

Model Numbers

SD 340  Speed and Rate Meter (RS232 interface) 
SA 340 Speed and Rate Meter (RS232 interface, analogue output) 
SR 340  Speed and Rate Meter (RS232 and RS485 interface) 

Features

  • Measuring functions: tachometer, rate meter and frequency counter with two independent encoder inputs for use wiht incremental encoders, proximity switches, photocells
  • Both impulse inputs wiht individual scaling, each adjustable to 1, 2 or 4 tracks (A, /A, B, /B), suitable for frequencies from 0,01 Hz up to 1 MHz
  • Programmable operating modes for rpm, speed, processing time (reciprocal speed), sum speed or differential speed, speed reatio and percentaged speed difference
  • 4 preslections with fast-switching outputs and prgrammable maintain / latch / start-up delay functions
  • Adjustable filtering fucntions, programmable linearization and more 
  • Power supply 24 VDC or 24 VAC, dimensions 96 x 48 mm (3.780 x 1.890")

Diagrams

SD340 Speed Ratio Meter Diagram

Specifications

AC Power Supply 24 V~ ±10%, 15 VA 
 DC Power Supply

24V  - (17 - 40V), approx. 100 mA (+encoder)

 Aux. encoder supply outputs

2 x 5,2 VDC, 150mA each

2 x 24 VDC, 120mA each 

 Inputs

2 universal encoder inputs (Ri = 8.5kΩ each channel)

4 digital control inputs HTL (Ri = 3.3 kΩ)  

Low < 2.5 V, High > 10V, min. Pulse width 50 µsec.

 Max frequency (per encoder)

RS422 and TTL differential: 1 MHz

HTL single ended: 200 kHz 

TTL single ended: 200 kHz

Switching outputs (all models) 

4 fast power transistors 5 - 30V, 350 mA (b)

Response time < 1 msec. (a) 

 Serial link

SD / SA: RS232, 2400-38400 Bauds

SR: RS232 and RS485, 2400 - 38400 Bauds 

 Analogue outputs (Models SA only)

0/4 - 20mA (load max. 270 Ohm)

0 - ±10V (load max. 2 mA)

Resolution 14 bits, Accuracy 0.1%

Response time < 1 msec. (a) 

 Ambient temperature

Operation: 0-45°C (32 - 113°F)

Storage: -25 - +70°C (-13 - 158°F) 

Housing   Norly UL94 - V - 0  
 Display 6 Digit, LED, high-efficiency red, 15mm (0.59") 
 Protection class rear side IP20 
 Screw Terminals Cross section max. 1.5mm² 
 Conformity and Standards EMC 2004/108/EC: EN61000-6-2, EN61000-6-3; LV2006/95/EC: EN61010-1 
(a) Continuous serial communication may termporary increase response times; Overal response  = measuring time + response time  
(b) Diode or RC filtering is mandatory when switching inductive loads