STT170 Smart Temperature Transmitter

he STT170 is Honeywell’s economy-tier family of temperature transmitters to flank the existing mid-tier STT700 and high-tier STT750 & STT850 temperature transmitters. It helps convert low level signals from temperature sensors such as RTDs and TCs into current signals and is capable of transmitting long distances through noisy plant environments.  The STT170 line consists of three temperature transmitters and one configuration tool:

• STT171 – Analog output, RTD-only sensor input
• STT173  – Analog output, RTD or thermocouple sensor input
• STT17H – HART output, RTD & thermocouple sensor input
• STT17C  – PC-based configuration tool for configuring the STT171, STT173 and STT17H transmitters
• 

• Overview

  • Models
  • STT171
  • STT173
  • STT17C
  • STT17H

  I/O Capabilities

  • Sensor Types Supported
  • Pt100, Pt1000, Ni100, B, E, J, K, L, N, R, S, T, U, W3, W5, v, mV

  • Response Time
  • 1 to 60 sec (STT173, STT17H) millisecond
  • Programmable: 0.33 to 60 sec (STT171) millisecond

  • Configuration
  • STT17C Configuration Tool (PC-based, graphical UI, not for hazardous environments)

  • Update Time
  • STT171: 135 ms
  • STT17H: 440 ms

  Functional & Control Features

  • Sensor Error Response
  • NAMUR NE43 (upscale 23 mA, downscale 3.5 mA)
  • Programmable Alarm Levels

  Electrical Specifications

  • Output Current Range
  • 4 to 20 mA
  • Update time: 135 ms (STT171), 440 ms (STT173, STT17H)

  • Power Supply Effect
  • ≤ 0.005% of span per VDC

  • Supply Voltage
  • 8 to 30 VDC (STT171)
  • 8 to 35 VDC (STT173, STT17H)

  • Input Type
  • RTD, T/C, Ohm, mV (varies by model) voltage direct current
  • Single or dual sensor input (STT17H) voltage direct current

  Environmental Conditions

  • Relative Humidity
  • 0 to 95% RH (Non-Condensing)

  • Load Resistance
  • 0 to 870 Ω
  • ≤ (V supply – 8)/0.023 A

  • Vibration
  • Max 4g over 25 to 100 Hz

  Applications & Compatibility

  • Applications
  • Cost-effective, programmable temperature monitoring
  • Replaces direct-wired sensor monitoring for improved accuracy, safety, reliability, and reduced wiring costs

  • Mounting
  • DIN Form B Head Mount

  Dimensions & Weight

  • Dimensions
  • 44 mm Dia x 20.2 mm H

  Standards & Certifications

  • Approvals
  • ATEX, ATEX: EN 50014, CE, CSA, EMC: EN 61326, EN 50020, EN 50281, FM, IECEx, KEMA Approvals for Hazardous Areas, NAMUR NE43, RoHS, UL

  Processing & Performance Metrics

  • Accuracy
  • Pt100: ±0.1 deg C, Ni100: ±0.1 deg C
  • T/C: varies by type (see detailed specs below)

  Others

  • Ambient Temperature Range
  • -40 to 185 deg F
  • -40 to 85 deg C