Outputs - Emerson Rosemount 975UF Reference Manual

Specifications and reference data
June 2021
Table A-2: Electrical Specifications
Operating voltage
Power consumption
(max. 18-32 Vdc)
Maximum current (18 -
32 Vdc)
Electrical input protection: The input circuit is protected against voltage-reversed polarity,
voltage transients, surges, and spikes according to MIL-STD-1275B.
A.3

Outputs

Electrical
interface
50
(continued)
Status
Normal when heater
on
Alarm
Alarm when heater on
Normal
Normal when heater
on
Alarm
Alarm when heater on
Normal
Normal when heater
on
Alarm
Alarm when heater on
There are five output configurations. These configurations must be defined
at the factory per the customer order and cannot be changed at the
customer facility.
See General instructions for electrical wiring
diagrams for each option.
Unless otherwise specified, the default is output configuration 1A. The
wiring arrangement is identified on the detector by the part number (see
Ordering information).
• Output configuration 1A: power, RS-485, 0-20 mA (sink), fault relay
(N.C.), alarm rela (N.O.)
• Output configuration 2A: power, RS-485, 0-20 mA (source) and HART
protocol, analog output, fault relay (N.O.), alarm relay (N.O., N.C.)
• Output configuration 3A: power, RS-485, 0-20 mA (source) and HART
protocol, analog output, fault relay (N.O.), alarm relay (N.O., N.C.)
• Output configuration 1R: power, RS-485, analog output, fault relay
(N.C.), auxiliary relay (N.O.), alarm relay (N.O.)
• Output configuration 2R: power, RS-485, analog output, fault relay
(N.O.), auxiliary relay (N.O.), alarm relay (N.O.)
All outputs Without 0-20 mA
95 mA 90 mA
110 mA 95 mA
135 mA 120 mA
1.95 W 1.85 W
2.56 W 2.45 W
3.04 W 2.56 W
3.68 W 3.2 W
90 mA 85 mA
105 mA 100 mA
130 mA 115 mA
160 mA 145 mA
for the wiring/terminal
Emerson.com/Rosemount
Reference Manual
00809-0100-4977
®