A-B 1746-ITB16 module Rockwell SLC 16 digital input

Channel-status LED Indicators (green)

The channel-status LED indicator operates with status bits in the 

channel status word to indicate the following faults detected by the module:

• Invalid channel configuration

• An open-circuit input

• Out-of-range errors

When the module detects any of the following fault conditions, it 

causes the channel-status LED indicator to blink and sets the 

corresponding fault bit in the channel status word. Channel fault bits 

(bits 12…15) and channel-status LED indicators are self-clearing when 

fault conditions are corrected.

Open-circuit Detection (Bit 12)

The module tests all enabled channels for an open-circuit condition 

each time it scans its inputs. Possible causes of an open-circuit 

include:

• broken thermocouple or CJC thermistor.

• thermocouple or CJC thermistor wire cut or disconnected.

• Usare una treccia in rame da 2.54 cm o un filo in rame da 5.2 mm2 (10 AWG) per collegare i singoli

chassis, la custodia ed un bus di terra centrale montato sul pannello posteriore

• Usare una custodia in acciaio per evitare disturbi elettromagnetici (EMI)

• Assicurarsi che il visore posto sullo sportello della custodia sia uno schermo laminato o un substrato

ottico conduttivo (per bloccare gli EMI)

• Installare un cavo di massa per il contatto elettrico tra lo sportello e la custodia; non utilizzare la

cerniera a tal scopo

Hinweis zur Installation

Die Montageplatte (linke Endplatte) für das Netzteil verfügt über die in der 

nachfolgenden Abbildung dargestellten Schrauben. Die mittlere und die rechte 

Endplatte werden durch ein Gussform-Kupplungselement in Position gehalten, 

sodass keine Schrauben erforderlich sind.

Connect Ground Bus to Grounding-Electrode System

The grounding-electrode system is at earth-ground potential and is the central ground for all electrical equipment and ac power within any facility. 

Use a grounding-electrode conductor to connect the ground bus to the grounding-electrode system. 

Use at minimum 8.3 mm2 (8 AWG) copper wire for the grounding-electrode conductor to guard against EMI. 

The National Electrical Code specifies safety requirements for the grounding-electrode conductor.