Mettler Toledo IND246 Guia De Instalacion página 58

2.4.6.3.4. Relay Outputs
The relay outputs can switch up to 250 VAC or 30 VDC voltages at 1A maximum. The relay outputs
are not polarity-sensitive since they are dry contact outputs. An example of wiring to the outputs is
given in Figure 2-65.
2.4.6.4. USB Connections
The USB option board is positioned in option position 1 on the Main board. This option board
provides a single USB type B connector port, shown in Figure 2-66.
The USB port is a device type interface (not a master) and operates basically as a serial port. A
mating type B USB cable is required when connecting to this port.
2.4.6.5. USB with Discrete I/O Connections
The USB/DIO option board is positioned in option position 1 on the Main board. This option board
provides a single USB type B connector port with two isolated inputs and four dry-contact, normally
open relay outputs. The inputs can be selected as either active or passive based on the position of
the slide switch on the board. The connectors are visible in Figure 2-67.
2-36 METTLER TOLEDO IND246 and IND246 POWERCELL Installation Manual
NOTES:
1. DRY CONTACT RELAYS.
2. RELAY CONTACT RATING:
AC: 24-250 VAC ,1.0 AMP. INTO RESISTIVE
LOAD
DC: 5-30 VDC ,1.0 AMP. INTO RESISTIVE
LOAD.
MAXIMUM SWITCHING POWER: 250VA, 30 W.
3. MAXIMUM OUTPUT CIRCUIT CURRENT = 3
AMPS.
4. ALL INDUCTIVE LOADS MUST BE
SUPPRESSED.
5. WIRE SIZE: 18 AWG (0.832 mm
Figure 2-68: Relay Outputs
Figure 2-69: USB Option Board
2
) MAXIMUM
2
24 AWG (0.205 mm ) MINIMUM
64084463 | 03 | 12/2017