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Teqd-2301b Manual: Comprehensive Guide to the Analog Temperature Controller The Teqd-2301b Go to product viewer dialog for this item.
| Problem | Possible Cause | Solution | |---------|----------------|----------| | LCD blank, no LEDs | Power off | Check L/N (85–265V AC), fuse F1 (2A slow) | | Erratic input reading | Loose thermocouple wire | Re-tighten terminals 4-5; use shielded cable | | Output stuck at 4mA | Range scaling mismatch | Verify high/low range ≠ identical values | | No Modbus response | Wrong baud rate | Default 9600,8,N,1. Check termination resistor (120Ω) | | Alarm not triggering | Hysteresis too wide | Reduce hysteresis (default 5 units) |
| Terminal | Label | Function | |----------|-------|----------| | 1 | L (85–265V AC) | Power input phase | | 2 | N | Neutral | | 3 | ⏚ | Earth ground | | 4 | A+ | Sensor input channel A (+) | | 5 | A- | Sensor input channel A (-) | | 6 | B+ | Sensor input channel B (+) | | 7 | B- | Sensor input channel B (-) | | 8 | OUT+ | 4-20mA output (+) | | 9 | OUT- | 4-20mA output (–) | | 10 | COM | Relay common (Alarm 1) | | 11 | NO | Relay 1 N.O. | | 12 | COM | Relay common (Alarm 2) | | 13 | NO | Relay 2 N.O. | | 14 | D+ | RS-485 A / Data + | | 15 | D- | RS-485 B / Data - | Teqd-2301b Manual
He jerked his hand back. The blueprint collapsed back into the paper.
Elias ran his thumb over the diagram. Suddenly, the paper warmed. The ink on the page—the brass gauntlet—began to shimmer. It wasn't just ink; it was a schematic that seemed to lift off the page, a three-dimensional blueprint hovering in the dim light of the basement. | | 12 | COM | Relay common
Rotate the front dial to your required sealing temperature. LED indicators typically show power status and when the heating element is active Technopack Corporation Monitoring:
: Ensure you are connecting a 110V AC line to a 110V rated unit, or a 220V AC line to a 220V rated unit. Incorrect voltage will instantly burn out internal circuit transformers. Elias ran his thumb over the diagram
While a standalone digital PDF manual is rarely hosted publicly, the operational steps typically include:
Once set, the primary power indicator lights up, and the unit feeds voltage to the heating blocks.
Route the output signal lines through the internal 3A relay or to an external solid-state relay (SSR) module powering the machine's cartridge heaters. Step-by-Step Calibration and Operating Instructions
Output relay chatters rapidly. Manual solution: Set P (proportional band) to a value greater than 0.5%. For ON/OFF control, set P = 0 and increase hysteresis ( Hyd ) to 2.0.