Category: Horner

General

In order to meet CISPR (EN 55011) Group 1. Class A Radiated Emissions levels, all components in the

PLC system require the following:

• All components must be mounted in a metal enclosure or the equivalent.  The wiring must be

routed in metal conduit or the equivalent.  All surfaces of the enclosure must be adequately

grounded to adjacent surfaces to provide electrical conductivity.

• The metal conduit (flexible conduit is acceptable) for all wiring external to the cabinet must be

mounted to the enclosure using standard procedures and hardware to ensure electrical

conductivity between the enclosure and the conduit.

• An external EMI filter must be wired to the AC Main for the PLC.  Sprague Electric Part

Number 259A9098P3 (available from GE Fanuc), or any other EMI filter which provides

equivalent performance, may be used.

• An external ground wire (16 AWG (1.32 mm2), 6″ (15.24 cm) maximum length) must be wired

from the Series 90-30 power supply safety ground wire terminal to the metal enclosure.

• On AC Main Ports connected to PLCs, MOVs shall be connected Line to Line and Line to Ground.

• All cables and Analog signals must use shielded cable with a minimum of overall foil.

DESCRIPTION

The Horner APG Thermocouple Input Modules allow thermocouple temperature sensors to be directly

connected to the PLC without external signal processing (transducers, transmitters, etc.).  All analog and

digital processing of the thermocouple signal is performed on the module.  These modules have a

resolution of 0.5°C, and temperature values may be reported to the PLC %AI I/O table in 0.5°C or 0.5°F

increments.  There are four standard resolution models available, with four input channels

(HE693THM409/HE693THM449), and with eight input channels (HE693THM809/HE693THM889).  All

models feature open circuit detection, where the temperature value written to the %AI register goes to its

maximum value upon an open circuit condition.  Two models (HE693THM449 and HE693THM889) also

feature %I alarm bits which energize on an open circuit condition.  The first four %I bits are used for the

HE693THM449 and the first eight %I bits are used for the HE693THM889.