Campbell Scientific LR4 Four Channel Latching Relay Module - Manual (Page 8)

LR4 Four Channel Latching Relay Module
3. Relay Details
Relay #1 and Relay #2
Contacts: 2 independent Form A (SPST)
Maximum Voltage Ratings: 30 Vdc / 30 Vac
Maximum Current: Not to exceed 100 VA or 5 A
Relay #3 and Relay #4
Contacts: 2 independent Form C (SPDT)
Maximum Voltage Ratings: 30 Vdc / 30 Vac
Maximum Current: Not to exceed 60 VA or 2 A
FIGURE 1. LR4 Latching Relay Module
4. Contact Details
4.1 Types
There are two different contact types on the LR4. One type is referred to as a
Form A and the second is referred to as a Form C. Relays #1 and #2 are type
Form A and Relays #3 and #4 are type Form C. The following figures outline
the differences:
FIGURE 2. Form A - State = 1
2