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• Heater:

To prevent condensation in the enclosure at low temperatures, it is recommendable to install

a heater. The heater must be dimensioned in accordance with the enclosure size.

A heater permits operation of the devices at temperatures below -20°C.

Note

The optionally available heater can be fused with a type B miniature circuit breaker up to 16 A

for short-circuit and line protection. A residual current device with a rated value of 300 mA

must be installed, preferably 30mA. Neither is installed in the Ex device.

• Modular electro-pneumatic automation system AirLine Ex (type 8650, from the company

Bürkert):

Connected to the ET 200iSP components to form an automation system for processing

electrical and pneumatic variables.

When connecting and operating, observe the manufacturer's descriptions and manuals.

• When installing a pneumatic system, exit the air passing through the exhaust connections

out of the enclosure.

NOTICE

Damage to seal or screwed glands

Make sure that the vent of the pneumatic system does not blow directly into the enclosure.

The pressure resulting in the enclosure would otherwise damage the seal and screwed

glands, and the degree of protection would no longer be provided.

Note

If components with a supply voltage of 120 / 230 V AC are installed, you must fuse these

devices according to the manufacturer information.

5.5 Use of I/O device at temperatures down to -40 °C

You must install a heater in the enclosure in order to operate the devices at temperatures down

to -40°C. Note the following:

When commissioning the enclosure in the closed state, switch on the built-in components

only after a speci󹪝c warming-up time, depending on the enclosure size and heating power.

With enclosure types 6DL2804-xxDxx and -xxExx, the warming-up time is at least 2 hours.

NOTICE

Low temperatures can cause serious damage

If components in the cabinet are switched on and operated at temperatures below the

speci󹪝ed minimum ambient temperature, they can su󹪜er serious damage.

Once a preheating time has elapsed (heating mode only), the cabinet interior reaches the

temperatures required for operation so that the other installed components can be added.

Mounting

5.5Use of I/O device at temperatures down to -40 °C

Distributed I/O device 6DL2804-1xxxx & 6DL2804-2xxxx

Hardware Installation Manual, 11/2023, A5E42025214-AC 25

Siemens SIMATIC ET 200iSP Installation Manual

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