Quantrol LC300 - Temperature Controller Jumo - Free user manual and instructions
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| Product Type | Temperature Controller |
| Brand | Jumo |
| Model | Quantrol LC300 |
| Dimensions (W x H x D) | 48 mm x 48 mm x 90 mm (1/16 DIN) |
| Weight | Approx. 150 g |
| Power Supply | 100–240 V AC, 50/60 Hz |
| Input Type | Universal (thermocouple, RTD, linear) |
| Output Options | Relay, SSR drive, analog 4-20 mA |
| Control Algorithm | PID with auto-tuning and self-optimization |
| Display | Dual 4-digit LED (red/green) |
| Alarm Functions | High/low alarm, sensor break alarm |
| Communication | RS-485 Modbus (optional) |
| Protection Rating | IP65 front panel |
| Operating Temperature | 0°C to 50°C |
| Maintenance | Clean front panel with soft cloth; avoid solvents |
| Safety Certifications | CE, UL, cUL |
| Replaceable Parts | Relay module, terminal blocks (order from Jumo) |
| Repair Support | Authorized service centers worldwide; spare parts available |
Frequently Asked Questions - Quantrol LC300 Jumo
How do I configure the input type for my sensor?
Press and hold the SET key for 3 seconds to enter configuration menu. Navigate to InP parameter and select your sensor type (e.g., Pt100, type K thermocouple). Confirm with SET.
What does the 'Err' display mean?
'Err' indicates a sensor break or short circuit. Check sensor wiring and continuity. If using a thermocouple, ensure correct polarity.
How to perform auto-tuning?
Go to tunE parameter and select on. The controller will perform one tuning cycle. Ensure load is near normal operating conditions.
Can I power the controller with 24 V DC?
Yes, the LC300 has a universal power supply accepting 24 V DC (20–50 V DC) as well as 100–240 V AC. Check the label for exact range.
How to set an alarm output?
Access alarm parameters via AL1 or AL2. Set ALM type to high/low and define setpoint. Connect output to external load.
What is the maximum load for the relay output?
The relay output is rated for 3 A at 250 V AC resistive load. Inductive loads require a snubber.
How to clean the front panel?
Use a soft, lint-free cloth lightly dampened with water or mild detergent. Do not use solvents or abrasive cleaners.
Is the controller RoHS compliant?
Yes, the Quantrol LC300 is compliant with RoHS Directive 2011/65/EU.
Where can I find the Modbus register map?
The Modbus register map is available in the communication manual (supplied separately or downloadable from Jumo website).
How to reset to factory defaults?
Press SET and ▼ keys simultaneously while powering up. The display will show rSt. Confirm to reset all parameters.
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USER MANUAL Quantrol LC300 Jumo
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Product information
Brand : Jumo
Model : Quantrol LC300
Category : Temperature Controller