Pfannenberg PCM 70 Peltier Cooling Unit, 24 V DC, 74 W

Peltier cooling and heating in a stainless IP 67 housing

The Pfannenberg PCM 70 is a 24 V DC Peltier unit that cools or heats a small enclosure without refrigerant or compressor. The PCM 55 and PCM 70 give 56 W and 74 W of cooling capacity and 84 W and 111 W of heating capacity. The stainless steel 1.4404 (V4A) cover and the IP 67 rating towards the surroundings make it a fit for harsh outdoor use, and it can be mounted in any position.

Heating and cooling are in one device, so no additional heater is needed. The sheet lists -40 to +70 °C ambient, high tolerance of shocks and vibration, and F-gas-free climatisation, which makes it a practical choice for small sensor boxes, camera housings, metering cabinets and mobile applications.

Technical specifications

Controller and accessories

The units are controlled by the Pfannenberg FLZ 700 Peltier thermostat (17270802070), which reverses the DC polarity for cooling and heating and offers a gap mode that saves energy. The sheet also lists a condensate drain channel (18310200006) and drainage elements for the bottom (18310200007) and the side (18310200008). Cooling-capacity curves for both units are on the product sheet. The Pfannenberg FLZ 700 is the matching Peltier thermostat. As a general point, a Peltier module moves heat rather than making cold, so the electrical input of 74 W for the PCM 55 or 108 W for the PCM 70 is added to the heat rejected on the outside, which is why the capacity drops as the temperature difference grows.

Selection and what to confirm before ordering

Peltier cooling is suited to small heat loads. Check the cooling capacity against the heat load at the maximum ambient temperature, using the performance curve, because capacity falls as the temperature difference between the inside and the outside rises. The sheet describes position-independent operation and high tolerance of shocks and vibration, so mounting orientation is flexible. Confirm the 24 V DC supply and its current capacity, the controller, the condensate arrangement and the cut-out size. For larger loads use a compressor cooling unit such as the DTT 6301 or the Rittal Blue e+ wall-mounted cooling units; see the Cooling category.

Related Pfannenberg products: Pfannenberg DTS 6301C Green Series Cooling Unit, 1500 W, Pfannenberg DTI 8401P Outdoor Cooling Unit, 2000 W, Pfannenberg DTS 3061 Cooling Unit, 694 W NEMA 3R/4, Pfannenberg DTT 6301 Top-Mounted Cooling Unit, 1500 W, Pfannenberg PWS 7062 Air/Water Heat Exchanger, 600 W and Pfannenberg PTF 60.500 Roof-Mounted Filterfan, up to 1000 m³/h.

Documents and quotation

The Pfannenberg PCM 55/PCM 70 product sheet is attached to this page and is the manufacturer’s own document, not a Seven Star summary. It also carries dimensions and performance curves.

State the heat load, supply and controller. Seven Star LLC, an independent supplier in Muscat, quotes the PCM 55 and PCM 70 against your application data; send the enclosure size, ambient temperature, supply voltage and quantity so the correct variant and article number can be confirmed before an offer is issued.