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There are several common combinations of switches that are configured. The following examples illustrate these:
- Single PCM 30 (bi dirertional directional CT) (analogue start & stop triggers) (Electrical Machines, e.g. M63, HW2000)
- Single PCM 20 (Command relays - NWR, NWN) (digital start, analogue end) (Clamplocks, electrical or hydraulic)
- Single PCM 20 (Detection relays - NKR, RKR, digital start, digital end) (Clamplocks, electrical or hydraulic)
- Two PCM 20 - (current triggered, note: channel mapping) (electrical machines)
- Single PCM 20 - Valve CTs, CT on N-R and R-N valve (hydraulic machines)
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