Sics; Connections; Discrete I/O (Input/Output); Mode Selector Switch - Mettler Toledo IND780 Guide D'installation

Discrete Output
Power Requirements
Aux Power Supply
2.7.6.

SICS

2.7.6.1.

Connections

SICS scale bases use a serial connection. They communicate using RS-232/422/485, and can
connect to COM1 or COM2 on the IND780 main board, or to a serial option board.
2.7.7.

Discrete I/O (Input/Output)

2.7.7.1.

Mode Selector Switch

A switch on the Discrete I/O board selects whether the inputs will be active or passive. An
explanation of these two modes and sample wiring diagrams were provided earlier in this chapter.
Ensure that the switch is set properly before wiring to the inputs. The location of the switch (S1) is
shown in the drawing and photograph in Figure 2-75. In both cases, the switch in the illustration is
set to active.
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Specification
Target latency time (turn off
time)
Preset to output on time
Power-up state
Output Type
Maximum Output Current Sink 35 mA
Output Voltage 5-30 VDC
Internal Supply +5V (no Output
current)
Internal Supply +5V (with
150mA Output current)
Internal Supply +12V
Output Power
• Description
200 µ sec maximum
20 msec maximum
Off
Open collector, TTL-compatible, current-sinking, negative true
230mA maximum
440mA maximum
150mA maximum
5V @ 150 mA, current limited
METTLER TOLEDO IND780 Installation Guide
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