Honeywell Weather Radio STT250 User Manual

Honeywell  
Housings for STT 3000  
Series STT250  
SMART TEMPERATURE TRANSMITTER  
EN0I-6032 01/98  
Housing Specifications and Dimensional Drawings  
OVERVIEW  
Honeywell’s STT250 range of  
Temperature Transmitters can  
be supplied with a wide variety  
of enclosures for direct sensor  
head, 2” pipe or wall mounting.  
Available materials include  
Aluminium, Plastic, Cast Iron  
and 316 Stainless Steel.  
Select the most suitable  
housing for lowest installed  
cost, lightweight, corrosive  
environments or for safety  
approvals - whichever is most  
important to match your  
requirements.  
All the housings for direct  
sensor head mounting include  
the facilities for spring loading  
of the STT250 transmitter  
module at a 33mm pitch (DIN  
43729).  
For FM or CSA Explosion-Proof If the temperature transmitter is  
applications, choose the  
Aluminium or 316 SS field  
mount housing.  
pipe or wall mounted, a housing  
can be supplied with a sensor  
and a terminal block installed  
for connection to the remote  
mounted transmitter.  
The housings can be supplied  
with the STT250 transmitter  
installed by specifying from the  
STT250 Model Selection Guide  
included in Sales Specification  
Sheet EN0I-6031.  
When integral meter is  
required, choose the pipe or  
wall (field) mount housing.  
Order sensor and thermowells  
for this direct sensor head  
mounting by referring to  
Specification EN0I-6033 (non-  
North America) and 34-44-29-  
01 (North America).  
For Flame-Proof EEx d  
applications, choose the Cast  
Iron housing and ensure that  
the sensor connection is  
sealed with an approved  
flametrap by ordering the  
sensor assembly with the  
transmitter and housing.  
 
316 Stainless Steel Direct Head  
Mount Housing  
Suitable for corrosive/ salt spray  
environments and for general purpose or  
Intrinsically Safe applications.  
33  
Dimensions shown in Fig. 4.  
Housing entry length = 40 mm  
Material : 316SS  
2 x M4  
Sensor entry : 1/2”NPT  
Cable/ conduit entry : 1/2”NPT or  
M20x1.5  
Paint cover : none.  
Weight : 1.6kg (3.5 lb)  
80  
1/2" NPT  
Enclosure classification IP65  
Order as STT250 Table II selection S _ _.  
Flame-Proof version available.  
B-B section  
A-A section  
Figure 4  
Meters  
Honeywell’s Series STT250 Temperature Transmitters can be supplied with local or remote indication. An Analogue or  
Smart meter can be mounted integral to the transmitter inside the field mount housing. Order an integral meter as part  
of the model number; Table II _ _ M and _ _ S, respectively. Order a remote meter as model RMA300.  
The analogue meter is a 4-20mA moving coil type and displays the temperature in 0 to 100% span.  
The Smart meter accepts 4-20mA or DE protocol and displays temperature on a LCD in engineering units or 0 to  
100% span. The Smart meter displays temperature in 0 to 100% span with the STT25H HART unit. Refer to 34-ST-  
25-08D for more details.  
The remote digital meter reads DE protocol and displays temperature on a LCD in 0 to 100% span. Refer to 34-ST-25-  
07A for details.  
STT250 Dimensions  
Aluminium Pipe or Wall (Field) Mount Housing  
Suitable for pipe or wall mounting remote from the temperature sensor, for direct sensor head mounting (in North  
America), for local indication and for Explosion-Proof (FM/ CSA and Cenelec), Intrinsically Safe or general purpose  
applications.  
Dimensions shown in Fig. 5 and 6.  
Material : Low copper Aluminium alloy  
Cable/ Conduit entries : 1/2”NPT.  
Paint cover : Beige polyester/ epoxy hybrid or beige epoxy painted.  
Weight : 1.1kg (2.4 lb)  
Enclosure classification : IP65. Conforms to the applicable requirements of NEMA 7and 9 for FM/ CSA Explosion-Proof  
applications.  
Order as STT250 Table II selection E _ _ or X _ _, respectively.  
316 Stainless Steel Pipe or Wall (Field) Mount Housing  
Suitable for corrosive/ salt spray environments and for pipe or wall mounting remote from the temperature sensor, for  
direct sensor head mounting (in North America), for local indication and for Explosion-Proof (FM/ CSA and Cenelec),  
Intrinsically Safe or general purpose applications.  
Dimensions shown in Fig. 5 and 6.  
Material : 316SS  
Cable/ Conduit entries : 1/2”NPT. 3/4” NPT or M20 available via an adaptor.  
Paint cover : none.  
Weight : 3.2 kg (6.9 lb)  
Enclosure classification : IP65  
Order as STT250 Table II selection T _ _.  
EN0I-6032  
3
 
Dimensions in  
Aluminium Field Mount Housing  
316 Stainless Steel Field Mount Housing  
Figures 5 and 6  
Without integral meter  
A
B
A
B
70 mm  
120.8 mm  
4.76 inch  
210.8 mm  
8.30 inch  
95.5 mm  
3.76 inch  
127 mm  
5.00 inch  
146.3 mm  
5.76 inch  
210.8 mm  
8.30 inch  
2.76 inch  
127 mm  
5.00 inch  
With integral meter  
A
A
B
B
With meter  
Without meter  
142  
(5.59)  
OPTIONAL 316 SS  
WIRED ON TAG  
PROCESS/SENSOR  
ENTRY : 1/2" NPT  
OPTIONAL M20 OR  
3/4" NPT ADAPTOR  
PANEL  
CABLE/CONDUIT  
ENTRY 1/2" NPT  
OPTIONAL M20 OR  
3/4" NPT ADAPTOR  
FIELD MOUNT  
HOUSING  
PROVIDE 2  
BOLTS AND NUTS  
M8 TO THE  
FIXATION  
94  
(3.7)  
115  
(4.53)  
Figure 5 - STT250 Wall Mounting Dimensions  
4
EN0I-6032  
 
A
A
B
B
CLEARANCE FOR CAP  
REMOVAL  
CLEARANCE FOR CAP  
REMOVAL  
With meter  
Without meter  
142  
(5.59)  
14.9  
(0.59)  
OPTIONAL 316 SS  
WIRED ON TAG  
OPTIONAL MOUNTING  
BRACKET FOR 2" PIPE  
PROCESS/SENSOR  
ENTRY : 1/2" NPT  
OPTIONAL M20 OR  
3/4" NPT ADAPTOR  
CABLE/CONDUIT  
ENTRY 1/2" NPT  
OPTIONAL M20  
OR 3/4" NPT  
ADAPTOR  
FIELD MOUNT  
HOUSING  
94  
(3.7)  
14.9  
(0.59)  
115  
(4.53)  
129.5  
(5.1)  
Figure 6 - STT250 Pipe Mounting Dimensions  
29.2  
(1.15)  
36.7  
(1.44)  
39.2  
(1.56)  
GDIN RAIL  
TOP HAT / ″Ω″ DIN RAIL  
EN0I-6032  
5
 
TOP HAT /  
DIN RAIL  
33  
(1.3)  
"G" DIN RAIL  
Optional DIN rail clip  
STT250  
52  
(2.05)  
STT250 MODULE  
INSTALLATION WITH DIN RAIL  
Figure 7 - STT250DIN Rail Mounting Dimensions  
Distributor :  
Honeywell  
Industrial Automation and Control  
Helping You Control Your World  
Honeywell Inc.  
In the U.S.A.:  
In Europe:  
Honeywell Industrial Automation and Control, 16404 North Black Canyon Hwy., Phoenix, AZ 85023, (602) 313-5000  
Honeywell Pace, 1 Avenue du Bourget, B-1140 Brussels, Belgium, (32-2) 728-211  
Honeywell S.A., Zone Industrielle de Longpré, F-80084 Amiens Cédex 2, France, (33-3) 22-54-56-56  
Honeywell Asia Pacific Inc., N° 19, Toa Payoh, Lorong 8 #06-00, Singapore 1231, 354-6768  
In Asia:  
In the Mediterranean:  
Africa & Middle East Region, Honeywell SpA, Via Vittor Pisani 13, 20124 Milano, Italy, (39-2) 67731  
In Canada: The Honeywell Centre, 155 Gordon Baker Rd., North York, Ontario M2H 3N7, 1-800-461-0013  
In Latin America: Honeywell Inc., 14505 Commerce Way, Suite 500, Miami Lakes, Florida 33016-1556, (305) 3642300  
6
EN0I-6032  
 

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