Analog Input ModuleProduct Specifications

and Installation DataHEC-ADC-80

The Horner Electric Analog Input Module HEC-ADC-80 is compatible with the Reliance Shark PLC. It provides 8channels of 12-bit (plus sign) input, and each channel may be configured for +/-10V or 4-20mA analog inputs.Each channel converts an analog signal into a digital value of +/-4095, and that value is placed directly in theShark I/O table as a word input. There are eight word inputs required per module, one per channel. The initialrelease of the Analog input module may not be used in the last slot of a 5-slot rack, or the last two slots of a 10-slotrack. This is due to a mechanial interference. Release A or later of the analog input module may be placed in anyslot of any Shark rack.

DE

SC

RIP

TIO

NW

IRIN

GS

PE

CIF

ICA

TIO

NS

Installation Hints

Wiring should be routed in its ownconduit.

Shielded, twisted wiring offers thebest noise immunity.

If shielded wiring is used, a goodearth ground connection (on oneend only) is critical. If shields areconnected at the module end, theframe ground (FG) terminal may beused as the shield ground point.

The PLC power supply radiates asignificant amount of noise. Forbest results, the analog inputmodule should be physicallylocated in a slot as far away fromthe power supply as possible.

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Specification Voltage Current Specification Voltage Current

Power Consumption 100mA @ 5VDC Digital Filtering 1 to 255 samples/update

Number of Channels 8 Analog Filtering approximately 1kHz*

PLC Input Words Required 8, 16-bit (i.e. 0-1 thru 14-15) Input Impedence >200Mohms 100ohms

PLC Output WordsRequired

1, 8-bit (i.e. 200) Maximum Voltage Input +/- 15VDC or AC

Measurable Input Range +/-10.24V 4-20.38mA A/D Conversion Type Integrating

Resolution 12-bits plus sign A/D Conversion Time 45 channels per second

Accuracy +/- 2 counts Operating Temperature 0 to 60°C (32 to 140°F)

Bus Isolation >500V Relative Humidity 5% to 95% non-condensing

12-12-97 MAN0181-01

Digital Filtering . The Analog Input Module features selectabledigital filtering, a technique whereby A/D conversions are aver-aged before being written to the PLC, enhancing signal stability.The effect of digital filtering on module response to a change inthe analog input signal is illustrated in the above chart. Thedigital filtering level is set by setting the first module's output wordto a value of 0-255. Legal values are 1-255 samples/update, or0, which is sets the factory default of 4 samples/update.

HA

RD

WA

RE

SE

TU

P

JP1through

JP8(bottom)

JP1,JP2(top)

PLC

INT

ER

FA

CE

Jumper Function Setting Jumper Function Setting

Top Board

JP1 Hardware Watchdog Factory Set JP2 PLC Select Factory Set

Bottom Board

JP1 Chan. 0, +/-10V/4-20mA See Module JP5 Chan. 4, +/-10V/4-20mA See Module

JP2 Chan. 1, +/-10V/4-20mA See Module JP6 Chan. 5, +/-10V/4-20mA See Module

JP3 Chan. 2, +/-10V/4-20mA See Module JP7 Chan. 6, +/-10V/4-20mA See Module

JP4 Chan. 3, +/-10V/4-20mA See Module JP8 Chan. 7, +/-10V/4-20mA See Module

Input Words

Input Words 8, 16-bit (i.e. 0-1 thru 14-15)

Units A/D Counts

Data Format bits 1-12 data, bit 16 sign

Data Range +/- 4095

Voltage V = counts x .0025

Conversion

CurrentmA = (counts x .004) + 4

Conversion

Output Words

Output Words 1, 8-bit (i.e. 200)

Units Samples/Update

Legal Range 0 to 255

0102030405060708090

100