ROC364 Instruction Manual
3-41 Input and Output Modules Rev Jun/05
3.7.11 HART Interface Module
HART Interface Module Specifications
FIELD WIRING TERMINALS
A: Loop Power (+T).
B: Channel 1 (CH1).
C: Channel 2 (CH2).
CHANNELS
Two HART-compatible channels, which
communicate via digital signals only.
Mode: Half-duplex.
Data Rate: 1200 bps asynchronous.
Parity: Odd.
Format: 8 bit.
Modulation: Phase coherent, Frequency Shift
Keyed (FSK) per Bell 202.
Carrier Frequencies: Mark: 1200 Hz.
Space: 2200 Hz, ± 0.1%.
HART MODULES AND DEVICES SUPPORTED
Up to six HART Modules and 32 HART devices
maximum.
Point-to-Point Mode: Two HART devices per
module (one per channel).
Multi-drop Mode: Up to ten HART devices per
module (five per channel).
LOOP POWER
Total power supplied through module for HART
devices is 20 mA per channel at 10 to 29 V dc.
Each HART device typically uses 4 mA.
POWER REQUIREMENTS
Loop Source: 11 to 30 V dc, 40 mA maximum
from ROC power supply.
Module: 4.9 to 5.1 V dc, 17 mA maximum.
VIBRATION
20 Gs peak or 0.06 in. double amplitude,
10 to 2,000 Hz, per MIL-STD-202 method 204
condition F.
MECHANICAL SHOCK
1500 Gs 0.5 ms half sine per MIL-STD-202,
method 213, condition F.
WEIGHT
48 g (1.7 oz) nominal.
CASE
Solvent-resistant thermoplastic polyester, meets
UL94V-0.
Dimensions 15 mm D by 51 mm H by 43 mm W
(0.60 in. D by 2.00 in. H by 1.69 in. W), not
including pins.
ENVIRONMENTAL
Meets the Environmental specifications of the ROC
in which the module is installed, including
Temperature, Humidity, and Surge specifications.
APPROVALS
Approved by CSA for hazardous locations Class I,
Division 2, Groups A, B, C, and D.
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