![background image](http://html1.mh-extra.com/html/vamp/vamp-55/vamp-55_installation-operation-and-configuration-instructions_3335045157.webp)
Technical description
8 Connections
8.5 Optional digital input/output
card
VM55.EN005
VAMP 24h support phone +358 (0)20 753 3264
157
How to select the threshold of digital inputs when the DI/DO –
option card is ordered separately and not modified at the
factory:
Figure 8.5-3 Option 1: 24Vdc / 110Vac
Figure 8.5-4 Option 2: 110Vdc / 220Vac
Figure 8.5-5 Option 3: 220Vdc