Rockwell Automation MAO04NND Analogue Output Module - Manual (Page 8)

8 MAO04NND Octrober 2005 – Issue 1
Triguard SC300E
EXTERNAL CONNECTIONS
All connections to the MAO04NND are made via DIN 41612 connectors.
The upper connector is the system triple I/O bus connector. The middle connector is for the
field inputs and outputs. The lower connector is electrically in parallel with the middle
connector.
System interface
This MAO04NND acts as a slave to the MPP masters, and communication between three
MPPs and the MAO04NND takes place over the triplicated 16 bit parallel I/O - MPP buses that
run along the chassis mounted backplane. The three I/O - MPP buses are connected via the
module’s upper system interface DIN 41612 connector.
Field interface
The MAO04NND outputs and feedback connections are wired via one of the connectors (J2 or
J3) to the termination card TPH44AIC.
Current loop outputs
Four 0 to 22mA with common return. The termination card has a precision resistor for each
channel to control the current. This allows two modules to be used for dual-slot hot repair
purposes using the same termination card.
CONFIGURATION LINKS
The module contains a hardware identity circuit that enables system identification of the
module, and seven manual configuration links, JP1 to JP4 and LK1, LK2 and LK3.
Links JP1 to JP4 and LK1 to LK3
Links JP1 to JP4 enable undercurrent and overcurrent monitoring from a special termination
card giving galvanically isolated outputs. Links JP1 to JP4 must be set to the Off position.
Links LK1 to LK3 are described in Section 2.6, Theory of operation.
POWER SUPPLIES
The MAO04NND operates from dual power inputs supplied by the system’s dual redundant
PSUs, that each supply voltages of approximately 5.4Vdc and 12Vdc.