Electrical connection
Leuze electronic BPS 8 50
TNT 35/7-24V
Connecting the functional earth FE
• BPS 8 with cable (option) and open cable end:
- Use shielded cables (see chapter 12.5 "Accessories – Cables").
- Connect the shield in the switch cabinet to FE (functional earth).
- The BPS 8 is usually connected to an earthed steel structure (PE). To prevent com-
pensating currents, FE and PE must be configured for potential equalization.
• BPS 8 connected via MA 8…:
- Use shielded cables (see chapter 12.5 "Accessories – Cables").
- Connect PIN 5 of MA 8 PWR connection cable to FE.
- The BPS 8 is usually connected to an earthed steel structure (PE). To prevent com-
pensating currents, FE and PE must be configured for potential equalization.
Cable lengths and shielding
The following maximum cable lengths and shielding types must be observed:
CAUTION
Connect functional earth!
Ensure that the functional earth (FE) is connected correctly.
Fault-free operation is only guaranteed if the functional earth is connected properly.
Connection Interface Max. cable length Shielding
BPS 8 - Service RS 232 10 m Absolutely required,
sheath of a shielded line
BPS 8/MA 8… - Host RS 485 25 m Absolutely required, shielded
Switching input 10 m Not necessary
Switching output 10 m Not necessary
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