Mettler Toledo IND131 Guide D'installation page 56

2.4.5.3.1. Active Input
Selecting the inputs as active enables connection of switches or other simple devices to trigger an
input. No voltage is supplied by the external simple device. The active and passive positions of the
selector switch are shown in Figure 2-51.
The wiring for the inputs of the solid state version is the same as for the relay version. An example
of this is shown in Figure 2-47.
2.4.5.3.2. Passive Input
Selecting the inputs as passive (Figure 2-51) 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".
The wiring for the inputs of the solid state version is the same as for the relay version. An example
of this is shown in Figure 2-48.
2.4.5.3.3. Solid State Outputs
The solid state outputs can switch up to 30 VAC or 30 VDC voltages at 400mA maximum. The
solid state outputs should be wired up as shown in Figure 2-52.
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Active Position
Figure 2-51: Active/Passive Input Switch
Figure 2-52: Relay Outputs
METTLER TOLEDO IND131/IND131x/IND331/IND331xx Installation Manual
Passive Position
NOTES:
1. SOLID STATE MOS FET RELAYS.
2. SOLID STATE OUTPUT RATING:
AC: Max. 30 VAC, 400mA INTO RESISTIVE LOAD
DC: 5-30 VDC, 400mA INTO RESISTIVE LOAD.
3. ALL INDUCTIVE LOADS MUST BE SUPPRESSED.
4. WIRE SIZE:
2
18 AWG (0.8 mm ) MAXIMUM
2
24 AWG (0.2 mm ) MINIMUM
2-33