Emerson Fisher FLOBOSS 407

FloBoss 407 Instruction Manual
3-40 Rev 5/00
3.7 I/O MODULE SPECIFICATIONS
The specifications for the various I/O modules are given in the following order in sections 3.7.1 through
3.7.11:
♦ Analog Input Modules—Loop and Differential
♦ Analog Input Source Module
♦ Analog Output Source Module
♦ Discrete Input Modules—Source and Isolated
♦ Discrete Output Modules—Source and Isolated
♦ Discrete Output Relay Module
♦ Pulse Input Modules—Source and Isolated
♦ Slow Pulse Input Modules—Source and Isolated
♦ Pulse Input Module—Low Level
♦ RTD Input Module
♦ HART Interface Module
3.7.1 Analog Input Modules—Loop and Differential
Loop Module Specifications
FIELD
WIRING
TERMINALS
INPUT
A:
Loop Power (+T)
B:
Analog Input (+)
C:
Common (-)
Type:
Single-ended, voltage sense.
Current loop with scaling resistor (R1).
Loop Current:
0 to 25 mA maxi-
mum range. Actual range depends
on scaling resistor used.
Voltage Sensing:
0 to 5 Volts dc,
software configured.
Accuracy:
0.1% of full scale (20 to
30 °C). 0.5% of full scale (-40 to
70 °C).
INPUT
(CONTINUED)
POWER
REQUIRE-
MENTS
ISOLATION
Impedance:
Greater than 400K
ohms (without scaling resistor).
Normal Mode Rejection:
50 dB
@ 60 Hz.
Loop Source:
25 mA maximum,
from ROC power supply or I/O
converter card (V
s
= 11 to 30 Vdc).
Module:
4.9 to 5.1 Volts dc, 6 mA
maximum; -4.5 to -5.5 Volts dc, 2
mA maximum (supplied by ROC).
Not isolated. Terminal C tied to
power supply common.