Mettler Toledo IND131 Installationshandbuch Seite 52

IND131/IND331 Terminals Installation Manual
An example of how to wire to the inputs when selected as active is shown in Figure
2-43.
Passive Input
Selecting the inputs as passive (Figure 2-42) enables other devices such as PLCs
to provide the trigger voltage (typically 12 VDC or 24 VDC, maximum 30 VDC) to
turn the inputs "on". An example of wiring to the passive inputs is shown in Figure
2-44.
2-28
NOTES:
1. VOLTAGE IS LOGIC LEVEL 5 VDC. LOW RESISTANCE CONTACTS
RECOMMENDED. MAXIMUM CABLE LENGTH: 20 FEET (6 m).
2.
DO NOT BUNDLE INPUT WIRING WITH POWER WIRING OR ANY
OTHER HIGH ENERGY CABLES.
3.
SWITCHES MAY BE REPLACED WITH RELAY DRY CONTACTS.
4.
WIRE SIZE: 18 AWG (0.8 mm
24 AWG (0.2 mm
Figure 2-43: Active Input Connections
NOTES:
1. VOLTAGE: 5-30 VDC, 10mA MAXIMUM CURRENT.
VOLTAGE POLARITY MAY BE REVERSED.
2. DO NOT BUNDLE INPUT WIRING WITH POWER WIRING
OR ANY OTHER HIGH ENERGY CABLES.
3. WIRE SIZE: 18 AWG (0.8 mm
Figure 2-44: Passive Input Connections
2
) MAXIMUM
2
) MINIMUM
2
) MAXIMUM
2
24 AWG (0.2 mm ) MINIMUM