Helios Large Display Temperature Meter Instruction Manual
PD2-7000
4
Table of Figures
Figure 1. Meter Mounting Holes ............................10
Figure 2. Meter Dimensions - Side View ...............10
Figure 3. Meter Dimensions – Front View .............10
Figure 4. Vertical Pipe Mount Assembly ...............11
Figure 5. Horizontal Pipe Mount Assembly ...........11
Figure 6. Fully Loaded PD2-7000 Connections ....12
Figure 7. Power Connections ................................12
Figure 8. Thermocouple Input Connections ..........13
Figure 9. Three-Wire RTD Input Connections ......13
Figure 10. Two-Wire RTD Input Connections .......13
Figure 11. Four-Wire RTD Input Connections ......13
Figure 12. Average Temperature RTD Input
Connections ..........................................................14
Figure 13. Relay Connections ...............................14
Figure 14. AC and DC Loads Protection .............. 15
Figure 15. Low Voltage DC Loads Protection ...... 15
Figure 16. RS-422 or RS-485 Wiring .................... 16
Figure 17. RS-485 Two-Wire Multi-Drop Wiring ... 17
Figure 18. Connections for RS485 Connector to
Serial Converter .................................................... 17
Figure 19. Three-Wire RS485 Connection ........... 17
Figure 20. Digital Input and Output Connections . 18
Figure 21. F4 Digital Input Connections ............... 18
Figure 22. 4-20 mA Output Connections .............. 19
Figure 23. Interlock Connections .......................... 19
Figure 24. Acknowledge Relays with Function Key
or Digital Input ....................................................... 36
Introduction
The Helios PD2-7000 is a multi-purpose, easy to use, large-display digital temperature meter. It
features large 1.8 inch superluminous LED digits, which can be read in direct sunlight from up to
100 feet away. It is housed in a water-resistant, field mountable NEMA 4X/IP65 rated enclosure
for convenient indoor and outdoor installation.
The meter accepts type J, K, T, E, R, S, B, N, and C thermocouples as well as 100 or 1000 Ω
platinum, 10 Ω copper, and 120 Ω nickel RTDs. Three of the programming buttons can be set
for custom operation. The meter features automatic cold junction compensation for thermo-
couples and can average up to 10 RTD sensors for precision temperature measurement.
A fully loaded Helios PD2-7000 temperature meter comes with four (4) SPDT relays, a 4 20 mA
output, two 24 VDC power supplies, five (5) digital inputs and four (4) digital outputs, and RS485
serial communications.
The four relays can be used for alarm indication or temperature control applications. The large
display size, ease of readability, Modbus
®
RTU serial communications, and digital I/O features
make the Helios an excellent addition to any system.
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