Honeywell HC900 Installation And User Manual page 88

I/O Module Installation and Wiring - I/O Terminal Block Wiring Diagrams
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.
Specifications for this module and for other modules are given in the Specifications section of this manual.
Examples of DC Output wiring are shown in Figure 43 - 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.
Reverse-Polarity Protection
A potential of ± 34 Volts will cause no damage to the module; a reverse polarity power supply connection
allows continuous current flow to the loads that are not controlled by the On/Off state of the output circuits.
Jumper Comb
Two-position jumper combs are available (as an option for barrier style terminal blocks only) for
connecting digital common wiring between terminals 10 and 12, and for connecting +24Vdc between
terminals 9 and 11. See Figure 44.
+V Terminals
The +V1 (terminal 9) and +V2 (terminal 11) are the positive power supply input to power the output
circuits for the two groups of eight inputs per group. The +V supply must provide minimum 24 Vdc at 65
mA (min) per group.
Hazardous voltages exist at terminal blocks.
•
Using switches at field devices, disconnect the field wiring from power sources before servicing.
Failure to comply with these instructions could result in death or serious injury.
78 HC900 Hybrid Controller Installation and User Guide Revision 5
9/03