ES-3315 Rev.8
TM
Super-mini Two-wire Signal Conditioners T-UNIT
POTENTIOMETER TRANSMITTER
Functions & Features
• Providing a 4 – 20 mA DC signal proportional to a potentiometer or slidewire position input
• Constant voltage excitation allows use with pots with total resistances from 100 Ω – 2 kΩ without affecting accuracy
• Minimal interaction between zero and span adjustments
• Monitor terminals
• High-density mounting
Typical Applications
• Tank levels
• Positions
MODEL:TM
ORDERING INFORMATION
• Code number: TM
GENERAL SPECIFICATIONS
Construction
: Stand-alone; terminal access at the front
Connection
: Euro type terminal
(applicable wire size: 0.25 to 1.5 mm
2
, stripped length
7 mm)
Housing material
: Flame-resistant resin (black)
Zero adjustment
: 0 – 10 % (front)
Span adjustment
(front):
50 – 100 % (of total resistance): 135 Ω or above
70 – 100 % (of total resistance): Below 135 Ω
INPUT SPECIFICATIONS
Potentiometer
: 100 Ω – 2 kΩ
Minimum span
: 50 % of total resistance (≥ 135 Ω); ≥ 70 % of total resistance (< 135 Ω)
Excitation
: Approx. 0.2 V DC
OUTPUT SPECIFICATIONS
Output
: 4 – 20 mA DC
Load resistance vs. supply voltage:
Load Resistance (Ω) = (Supply Voltage (V) – 12 (V)) ÷ 0.02 (A) (including leadwire resistance)
INSTALLATION
Supply voltage
: 12 – 28 V DC
Operating temperature
: -5 to +60°C (23 to 140°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Surface or DIN rail
Weight
: 120 g (0.26 lb)
PERFORMANCE in percentage of span
Accuracy
: ±0.2 %
Temp. coefficient
: ±0.015 %/°C (±0.008 %/°F)
Response time
: ≤ 0.5 sec. (0 – 90 %)
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM