24
Output 2 functions: Dwell timer
Deviation high/low alarm
Deviation band high/low alarm
PV high/low alarm
PID cooling control
Alarm modes: Normal, latching, hold, latching/hold.
Dwell timer: 0.1–4553.6 minutes
Data Communication
Interface: RS-232 (1 unit), RS-485 (up to 247 units)
Protocol: Modbus protocol RTU mode
Address: 1–247
Baud rate: 0.3 - 38.4Kbits/sec
Data bits: 7 or 8 bits
Parity bit: None, even or odd
Stop bit: 1 or 2 bits
Communication buffer: 160 bytes
Analog Retransmission
Output Signal: 4-20 mA, 0-20 mA, 0-5V, 1-5V, 0-10V
Resolution: 15 bits
Accuracy: ±0.05% of span ±0.0025%/°C
Load Resistance: 0-500 ohms (for current output)
10K ohms minimum (for voltage output)
Output Regulation: 0.01% for full load change)
User Interface
Single 4-digit LED display
Keypad: 3 keys for TEC-220, 4 keys for TEC-920
Programming port: For automatic setup, calibration, and
testing
Communication port: Connection to PC for supervisory
control
Control Mode
Output 1: Reverse (heating) or direct (cooling) action
Output 2: PID cooling control, cooling P band 50~300% of
PB, dead band -36.0-36.0% of PB
ON-OFF: 0.1-90.0 (°F) hysteresis control (P band=0)
P or PD: 0–100.0% offset adjustment
PID: Fuzzy logic modified
Proportional band 0.1-900.0°F
Integral time 0–1000 seconds
Derivative time 0–360.0 seconds
Cycle time: 0.1–90.0 seconds
Manual control: Heat (MV1) and cool (MV2)
Auto-tuning: Cold start and warm start
Failure mode: Auto-transfer to manual mode while sensor
break or A-D converter damage
Ramping control: 0–900.0°F/minute or
0–900.0°F/hour ramp rate
Digital Filter
Function: First order
Time constant: 0, 0.2, 0.5, 1, 2, 5, 10, 20, 30, 60 seconds
programmable
Environmental and Physical
Operating temperature: 14°F (-10°C) to 122°F (50°C)
Storage temperature: -40°F (-40°C) to 140°F (60°C)
Humidity: 0 to 90% RH (non-condensing)
Insulation resistance: 20Mohms min. (at 500VDC)
Dielectric strength: 2000VAC, 50/60 Hz for 1 minute
Vibration resistance: 10–55 Hz, 10 m/s≈ for 2 hours
Shock resistance: 200m/s ≈ (20g)
Moldings: Flame retardant polycarbonate
Dimensions:
TEC-220 — 1-3/64" (26.5 mm) H × 2" (50 mm) W
× 4-3/8" (110.5 mm) D
Depth behind panel: 3-7/8" (98 mm)
TEC-920 — 1-7/8" (48 mm) H × 1-7/8" (48 mm) W
× 3-3/4" (94 mm) D
Depth behind panel: 3-3/8" (86 mm)
Weight: TEC-220—.26 lbs. (120 grams)
TEC-920—.31 lbs. (140 grams)
Approval Standards
Safety: UL61010C-1
CSA C22.2 No. 24-93
EN61010-1 (IEC1010-1)
Protective class:
IP65 front panel for TEC-220
IP30 front panel for TEC-920, all indoor use
IP20 for terminals and housing with protective cover.
All indoor use.
EMC: EN61326
Specifications, continued…
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