Mettler Toledo IND570 Manual De Instalación página 89

2.4.6.3.2. Passive Input Wiring
The inputs can be selected as either active or passive via a switch on the board. When "active" is
selected, an external voltage source is required.
2-56 METTLER TOLEDO IND570 Terminal Installation Manual
Notes for Passive Input Discrete I/O wiring:
•
Voltage: 5-30VDC, 10 mA max. current. Voltage polarity may be reversed
•
The two IN COM terminals are connected internally on the DI/O pcb so either IN COM can
be utilized during installation. Two IN COMs are provided as a convenience for installations
where external switches/contacts are not located together and multiple commons require
wire termination.
• Do not bundle input wiring with power wiring or any other high energy cables
• Wire sizes: 22 AWG min./14 AWG max.
Figure 2-102: Passive Input Wiring
30205319 | 11 | 07/2019