many Enapter devices as wanted to a common safety signal. To use the dry contact to shut down the
hydrogen production, connect a normally open dry contact circuit to Circuit 1 (as shown in the picture),
using the specially supplied plug. This circuit is generally achieved by a relay system that is triggered to
open by signals sent from a switch or sensor used to ensure system safety. If the circuit is interrupted
(i.e., the dry contact is opened), the device will immediately stop all hydrogen production and release
the internal hydrogen by purging.
To pass the signal on to the next Enapter device, connect the two free contacts (Circuit 2) to the Circuit
1 of the nearest Enapter device. If the dry contact circuit is triggered by an opened contact, all
connected devices will stop. Opening the Dry Contact circuit will cause the stack to be immediately de-
energised and the device to depressurise and to go into fatal error. Dry contacts should not be used for
normal start and stop operation. Unexpected power cuts to the stack without normal ramp downs can
shorten the device’s lifetime and damage the device!
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