Discrete Output Source Module; Figure 3-13. Discrete Output Source Module Field Wiring - Emerson Fisher FLOBOSS 407 Instruction Manual

FloBoss 407 Instruction Manual

3.4.7 Discrete Output Source Module

A schematic representation of the field wiring connections to the output circuit of the Discrete Output
Source module is shown in Figure 3-13.
The Discrete Output Source module is designed to operate only with non-powered
discrete devices such as relay coils or solid-state switch inputs. Using the module
with powered devices may cause improper operation or damage to occur.
The Discrete Output Source module provides a switched voltage across terminals B and C that is
derived from internal voltage source V
ROC/FloBoss electronics provides a voltage at terminals B and C. When V
ROC/FloBoss electronics, the field device is no longer energized.
When using the Discrete Output Source module to drive an inductive load such as a
relay coil, a suppression diode should be placed across the input terminals to the
load. This protects the module from the reverse EMF spike generated when the
inductive load is switched off.
DO SRC
+5V
CONTROL
V
I LIMIT
S
DOC0145A
3-16
. A field device, such as a relay coil, is energized when the
s
1 Amp
N/C
A
+
+
B
–
C
–

Figure 3-13. Discrete Output Source Module Field Wiring

CAUTION
CAUTION
is switched off by the
s
ROC-POWERED
DISCRETE DEVICE
Rev 5/00