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Communication Controls
25-PIN USER PORT
25-Pin User Port Connector
The User port uses a 25-pin, shielded, female, subminiature-D connector. Ground/
return lines are floating and need to be connected as close to the system as possible.
Pin 14
Pin 1
Figure 4‑1. User port connector, 25-pin
User Port Cabling Requirements
The cable used to connect the generator's User port to the system controller must be
a shielded, 25-wire I/O cable. Twisted-pair wiring may be used but is not mandatory.
Signal losses should be minimized by keeping the cable length as short as possible.
The maximum recommended cable length between the generator and the controller is
10 meters (33'). To minimize interference from adjacent electrical equipment, the
EMI shield in the cable must be terminated to the metal shells of the cable's
connectors. Additionally, the chassis of the generator must be tied to a local earth
ground through an adequately sized copper grounding strap.
Satisfying Minimal Requirements for the 25-Pin User Port
Regardless of whether you are controlling and monitoring the generator through the
User port or through another port, two User port signals must be satisfied for the unit
to be operational: RF PWR ON (pin 4) and INTERLOCK LOOP (pins 10 and 23). In
other words, even if you are controlling the generator through the serial port
interface, the RF signal must be enabled on the User port, and the interlock satisfied.
☞
Important
If you are controlling your generator through a port other than the User port,
make sure that the control mode is set appropriately (to host mode to control
through the Host port, for example). The control mode can be set through an
AE Host command.
57020114-00E
Paramount
Pin 25
Pin 13
Communication Controls
®
MF 2 kW Generator
Chapter
4
4‑1
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Troubleshooting
