User Guide

FUNCTIONAL DESCRIPTION

1. Infrared optical interface for HI 504920

2. Cable glands for 24 VDC power supply, for HI504

or computer workstation connection, for pH (or

ORP) electrode & temperature probe inputs

3. Cable gland for Matching Pin connection

4. Power supply input (24V AC/DC)

5. RS485 connections to HI 504, PC or modem

6. Connections for Pt100/Pt1000 temperature sensor

7. Connection for Potential Matching Pin

8. Connection for electrode reference

9. Connection for pH or ORP electrode input

10. Protecting shield: remove to access connectors;

reattach after wiring.

11. Green status LED

12. Red status LED