HRW HPE8884MR Manual

HPE8884MR Network I/O Expansion, Modbus RTU 485
FW4.02
28 point network point expansion unit for Modbus 485 networks. The large I/O count enables remote
monitoring and control of numerous points over the Modbus network.
Universal inputs may be locally scaled and tagged according to engineering units, calibrated and/or
filtered to adjust for cabling or sensor characteristics. Digital inputs and UI's may be configured as pulse
counters. Digital outputs may have short-cycle timers set.
Typical Applications

Digital/analogue inputs such as alarms, operation statuses, high/low level, water & air flow
proving, environmental conditions such as temperature, humidity or pressure, and other
auxiliary contacts.

Digital/analogue outputs for switching of fans, pumps, lighting or remote status indication, and
modulating control of actuators, speed or load controllers and remote analogue gauges.

Universal inputs and digital inputs may be used as counting inputs for metering of energy and
volume and instantaneous load calculation at the Master controller
Feature Summary

8 Digital Inputs (DI n/o or n/c, flip/flop, pulse-counting up to 10Hz)

8 Digital Outputs (DO) with power-up presetting & short-cycle timers

8 Universal Inputs (UI - user configurable analogue [AI] or digital [DI n/o or n/c], flip/flop, pulse-
counting up to 10Hz)

4 Analogue Outputs (AO) with power up presetting

RJ11 socket connection of HSD0012 or HSD0011 room sensors to UI1 & UI2 (room sensor
with set point adjuster option, occupancy button & HPECOM port)

UI's user definable for non-standard sensors, active or passive from 1kΩ

Connected sensors may be calibrated and filtered by way of the UI configuration

Isolated, 256 node (1/8

Communication speeds from 2400 baud up to 76800 baud

LED indication of the On/Off status of DI and DO points for fast visual status verification

Dynamic LED indication of AO status

Sequential flashing of DI LED's as 'Watchdog'

Automatic communication resumption after a power loss

PC configuration by text file download using FUNCPROG or by direct parameter settings entry

Upload text file data for retrieving lost application settings, for re-use in other controllers
HRW Limited
load), RS485 network driver
th
Unit E, 11/F, Sun Ying Industrial Centre
9 Tin Wan Close, Tin Wan
Hong Kong
Ph +852 2546 7402
Fax +852 2546 7403
www.hrw.hk