Honeywell HC900 User And Installation Manual page 125

DC Output Module Wiring
The DC Output Module provides 16 current-sinking outputs in two groups of eight points per group. The
two groups are isolated from each other; outputs are non-isolated within each group. Current sinking
means that a positive voltage potential is continuously applied to one side of each DC output load, and the
negative side of the load is switched internally in the module. SIL applications require an external series
relay used to ensure outputs achieve failsafe action. See HC900 Process & Safety Controller Safety Manual
for additional details.
Specifications for this module and for other modules are given in the Specifications manual. Examples of
DC Output wiring are shown in Figure 60 - DC Output Module Wiring Diagram
Over-Current Protection
Electronic high-current and high-temperature limiting provides overload protection; resets after cycling
power. Conventional external fuses may be used if desired.
Revision 6
21 April 2017
Figure 59 – Contact Input Wiring Diagram
HC900 Process & Safety Controller User and Installation Manual 111