Metso Automation MAX Controls
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277573
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Chapter 3
Input/Output
Connections
Data Highway
The upper left portion of the DPU chassis features two groups of male and
female 9-pin D-type connectors used to connect the clockwise (CW) and
counter-clockwise (CCW)
DPU Bus
cables. Positions J2 and J3 are for CW
connections, and J4 and J5 are for CCW. For additional information on
Input/Output connections, refer to Publication 277580,
DPU Bus
Cabling.
ACSII Ports
Directly below the DPU Bus connections are two female 25-pin D-type
connectors (J6 and J7) which serve as ASCII serial ports. Table 3-1 provides
the pin-outs for both ports. These two ASCII ports provide linkage to
programmable logic controllers, remote multiplexers, etc. Connections can
be RS-232, RS-422, or RS-485, chosen without jumpers, with proper
connection to the 25-pin D-Connectors. When you define a DPU via
maxTOOLS, you may configure setup parameters, such as baud rate, parity,
and number of stop bits. You may also enter setup information directly on
Interaction Page 9. Remember, when you add this information, you must
take the DPU offline.
Table 3-1. ASCII Port Pin-outs (usable via ExCEL, Rev. 2)
Pin No.
Purpose
24
Transmit Data
TxD + (RS-422)
2
Transmit Data
TxD - (RS-422), or TxD (RS-232/423)
23
Receive Data
RxD + (RS-422)
3
Receive Data
RxD - (RS-422), or RxD (RS-232/423)
4
Request-to-Send
RTS (RS-232/423)
5
Clear-to-Send
CTS (RS-232/423)
7
Circuit Ground
1
Chassis Ground
