Rockwell Automation MDO16FNS 16-Channel Digital Output Module 120Vac/dc - Manual (Page 5)

MDO16FNS October 2005 – Issue 4 5
Triguard SC300E MDO16FNS 16-Channel D/O Module 120Vac/dc
TECHNICAL DESCRIPTION
PHYSICAL
The MDO16FNS is a 9U high PCB with integral front panel and rear connectors. A plug-in
daughterboard carries the common interface circuits. The board faces are protected by
detachable covers (see Section 3.1, Scope). Figure 1-1 shows the general layout, including
the location of the connectors, covers and front panel details.
Mechanical coding blocks
All Input/Output modules carry two coder blocks equipped with pins which mate with holes in
corresponding blocks in the chassis and prevent the module being inserted into the wrong slot.
The pins in the module blocks are factory installed in a pattern determined by the module and
corresponding set screws are removed from the chassis coder blocks to enable fitting. Unused
holes are plugged with set screws. The chassis slot coder block configuration for this module
is shown in Figure 2-1.
Figure 2-1 Chassis slot coder blocks configuration
EXTERNAL CONNECTIONS
Field circuits
The field load circuit shown in Figure 2-2 is the typical required for the safe connection of field
loads to the MDO16FNS. For any unused channel a dummy field load (value 4.7k ohm) should
be used. We however, recommend the use of their 16-Channel Digital Output Termination
Cards TDO16AIB which offer full connection facilities with indicating fuses, and alarm outputs
(See Section 1.2, Associated documentation).