Specifications

1. Introduction MI 611-211 – October 2005
5
Figure 2. Supply Power vs. Load
Product Safety: The 870IT transmitters have been designed to meet electrical safety descriptions
listed in Table 1. For detailed information, or status of testing laboratory approvals/certifications,
contact Invensys Foxboro.
Table 1. Product Safety Specifications
Testing Laboratory,
Type of Protection,
and Area Classification Application Conditions
Electrical
Safety Design
Code
ATEX intrinsically safe for II 1 G, EEx ia IIC hazardous
locations.
Temperature Class T4 - T6 AAA
ATEX Type n energy limited for II 3 G EEx nL IIC
hazardous locations
Temperature Class T4 - T6 ANN
CSA intrinsically safe for Class I, II, and III, Groups A,
B, C, D, E, F, and G, Division 1 hazardous locations.
Connect per MI 611-206.
Temperature Class T4.
CAA
CSA suitable for use in Class I, II, and III, Groups A, B,
C, D, F, and G, Division 2 hazardous locations.
Temperature Class T4. CNZ
FM intrinsically safe for Class I, II, and III, Groups A, B,
C, D, E, F, and G, Division 1 hazardous locations.
Connect per MI 611-206.
Temperature Class T4.
FAA
FM nonincendive for Class I, II, and III, Groups A, B,
C, D, F, and G, Division 2 hazardous locations.
Temperature Class T4. FNZ
NOTE
The transmitter will function with an output load
less than 250 ohms provided that a PC-based
1400
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
0
12.5
20
30 40
42
1450
TYPICAL SUPPLY VOLTAGE
AND LOAD LIMITS
OPERATING
AREA
OPERATING
AREA
SUPPLY VOLTAGE, V dc
OUTPUT LOAD, Ω
SEE NOTE
V dc
Load (ohms)
24 250 and 565
30 250 and 860
32 960
250 and
configurator is not connected to it. Connecting
a PC-based configurator while operating in
this area may cause disturbances and/or
communication problems.
250