Electrical Connections - Honeywell OELD Operating Instructions Manual

4 Electrical Connections

Number Marking
1 +V
2 -V
3 mA
4 +V
5 -V
Number Marking
1 +V
2 -V
3 mA
4 485A
5 485B
6 485A
7 485B
<Figure 8. OELD Electronics Module>
Terminal Block 1 (TB1)
Colour Description
Red Input power +ve
Black Input power 0V
White mA Signal to Field Wiring
Red Auxiliary power e.g. Excel cross duct heater
Black Auxiliary power e.g. Excel cross duct heater
Terminal Block 2 (TB2)
Colour Description
Red Sensor power +ve
Black Sensor power -ve
White mA Signal to gas detector (Optima, Excel, etc.)
Blue RS-485+ to Optima or Excel
Orange RS-485 to Optima or Excel
Blue Reserved for SHC-1 connection
Orange Reserved for SHC-1 connection
4 Electrical Connections
OELD Operating Instructions
11