
Do you have a question about the Johnson Controls Penn A421 Series and is the answer not in the manual?
| Power Consumption | 5 VA max |
|---|---|
| Relative Humidity | non-condensing |
| Output Type | Relay |
| Mounting | Surface mount |
| Control Mode | On/Off |
| Enclosure Rating | NEMA 1 |
| Input Types | Thermistor |
| Sensor Type | Thermistor |
Details the A421 Series Standard Electronic Controls with SPDT relay, LCD, touchpad, and LED indicator.
Explains setting defrost periods, intervals, and manual activation methods for the A421 Control with Defrost.
Covers sensor offset, temperature setback, anti-short cycle delay, and user adjustment modes.
Details Type 1, IP20 and Type 4X, IP66 enclosures for surface or DIN rail mounting.
Lists sample temperature control applications for refrigeration and HVAC equipment.
Displays temperature, parameters, status, backlight intensity, and custom icons.
Offers two levels of parameter adjustment and control for setup.
Covers On/Off adjustment, switch-activated setback, and anti-short cycle delay.
Details adjustable sensor offset, restricted adjustment mode, and sensor failure behavior.
Covers LCD backlight adjustment and guidance for repairs.
Guides on ordering sensors, hardware, and accessories from distributors.
Lists A421 models, enclosures, and included sensors with their specifications.
Details various A99 PTC temperature sensors, probe types, cable lengths, and operating ranges.
Lists available accessories like DIN rail sections, clamps, clips, sun shields, and enclosures.
Provides detailed specs for power, supply, ambient conditions, temp range, sensor, enclosure, and compliance.
Outlines terms of use for the product's software and hosted services.
Lists regional contact points and provides links for customer support.
States the product is covered by a limited warranty with details available online.












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