Emerson Rosemount 975 - Troubleshooting; LED Off, Fault Relay Open, 0-20 mA 0 mA; LED Flashes Yellow, Fault Relay Open, 0-20 mA 1 mA; LED Flashes Yellow, Relay Open, 0-20 mA 2 mA

A Reference data
A.1 Ordering information, specifications, and
dimensional drawings
To view current Rosemount 975 Series ordering information, specifications, and
dimensional drawings, follow these steps:
Procedure
1. Go to Emerson.com/en-us/catalog/flame-detectors
2. Select the appropriate product.
3. Scroll down to Documents and Drawings.
4. Select DATA SHEETS & BULLETINS
5. Select the appropriate Product Data Sheet.
A.2 Product certifications and installation
drawings
To view current Rosemount 975 Series product certifications and installation drawings,
follow these steps:
Procedure
1. Go to Emerson.com/en-us/catalog/flame-detectors
2. Select the appropriate product.
3. Scroll down to Documents and Drawings.
4. Select CERTIFICATES & APPROVALS
5. Select the appropriate document.
A.3 Failure status codes
Rosemount 975 MR and HR Models
Status
Description 4-20mA
output
Analog
output
Fault
relay
LED
indicator
Test rate
S90 Start up 1mA 0v Open 4Hz
blinking
orange
Every start-up
S91 E2PROM
parameter
restoration
1mA 0v Open 4Hz
blinking
orange
After
parameters
burning
Reference Manual Reference data
00809-1500-4975 June 2021
Rosemount 975 31