Hardware User Manual Manual

Publication 1758-UM001D-EN-P - June 2011

Wiring the Controller 35

Wiring for Pulse Count Input (PI)

Counter inputs operate as DC inputs or as high-speed counter inputs. This

figure shows how to wire these inputs.

Each pulse input has a filter circuit that allows more reliable operation in noisy

environments, but at reduced counting frequency. The factory default setting

of the filter is disabled, allowing operation to 10 KHz. With the filter

DIP-switch set to on, maximum frequency is reduced to 30 Hz.

Wiring for RS232 Serial Communications

Shielded cabling must be used for RS232 wiring in the DataSite controller. The

shield should be connected to chassis ground at one point. Failure to properly

shield the cable may result in the installation not complying with FCC or DOC

wireless electromagnetism interference regulations.

The following table shows the serial and protocol communication parameters

supported by RS232 Serial port. These parameters are set from the DS Setting

software utility for the 1758-RTU controller or the DS FloConfig software

utility for the 1758-FLO controller. For details, refer to the DataSite Software

User Manual, publication 1758-UM002

Serial and protocol communication parameters

Parameter Engineering value

Baud rate (bps) 2400, 4800, 9600, 19200, 38400, 57600

Communication duplex mode Full Duplex, Half Duplex

Parity Odd, None or Even

Data bits 7 or 8 bits

PULSE OUTPUT

DEVICE (12…24 V)

12…24 V

Filter PI0

Filter PI1

Filter PI2

PI0 PI1 PI2 PI-COM

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