Rosemount 3491 - APPENDIX A Specifications; Specifications

Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
www.rosemount.com
Appendix A Reference Data
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-1
Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-3
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-6
SPECIFICATIONS
General
Product Rosemount 3490 Series Control Unit:
3491 - Standard Control Unit
3492 - Differential Control Unit
3493 - Logging Control Unit
Mounting styles Wall mount or Panel mount
Power options AC Mains or DC
Display
Type Dot matrix LCD, 32 x 122 pixels, back lit
Location Integrated into enclosure
Indicators Red LED for health status
Electrical
AC Mains Power Supply Input 115V or 230V ac ±10% (switch selectable).
Power consumption: 10VA nom., 18VA maximum.
Fuse: 200mA(T), 5 x 20mm, 250V
DC Power Supply Input 15-30V dc, 30Vdc maximum.
Power consumption: 9W maximum.
Current Input 4-20mA (Earth referenced in control unit) or HART digital communications (Rev. 5)
Supplies 23 volts from 400 Ohm source resistance.
Trigger Inputs 2 voltage-free contact closures.
Current Output Signal range (nominal): 4-20mA
Output range (linear) : 3.8 - 20.5mA.(Alarm current of 3.6 or 21mA - user-selectable)
Load: Rmax is 1 K Ohm
Resolution: 12-bit
Regulation: < 0.1% over load change from 0 to 600 Ohms
Isolation: Isolated from other terminals to 500V dc
Update rate (software): 5s
Relays 5 SPCO, 5A at 240V ac
Cable entry IP-rated wall mount enclosure:
5 positions pre-drilled, 2 glands and 3 blanking plugs supplied.
NEMA4X-rated wall mount enclosure:
Positions require drilling by user, glands/conduits and blanking plugs are not supplied.
Panel enclosure:
Direct wiring to terminal blocks at rear.
Cable connection Wall mount enclosure:
Cage clamp terminal blocks in separate terminal compartment.
Panel mount enclosure:
2-part cage clamp terminal blocks at rear.