Woodward LS-5 v2 Series - Connecting 24 V Relays

Woodward recommends the use of shielded, twisted-pair cables for the CAN bus (see
examples).
• Lappkabel Unitronic LIYCY (TP) 2×2×0.25
• UNITRONIC-Bus LD 2×2×0.22
3.5 Connecting 24 V Relays
NOTICE!
Damage to adjacent electronic components due to induced voltages
• Implement protection circuits as detailed below.
Fig. 71: Protection circuit (example)
Interferences in the interaction of all components may a󰈠ect the function of electronic
devices. One interference factor is disabling inductive loads, like coils of electromagnetic
switching devices.
When disabling such a device, high switch-o󰈠 induced voltages may occur, which might
destroy adjacent electronic devices or result interference voltage pulses, which lead to
functional faults, by capacitive coupling mechanisms.
Since an interference-free switch-o󰈠 is not possible without additional equipment, the
relay coil is connected with an interference suppressing circuit.
If 24 V (coupling) relays are used in an application, it is required to connect a protection
circuit to avoid interferences.
╚═▷ Fig. 71
shows the exemplary connection of a diode as an interference suppressing
circuit.
73LS-5 v2 Series37650
3 Installation
3.5 Connecting 24 V Relays
Released