NEC Xen Master System Hardware Manual page 190

NEC Australia Pty Ltd
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5.6.5 Connectors
The FMS(2/4)-U13 ETU has the following connectors:
✆
J9 connects to the backboard
✆
J1 (9-pin RS-232) is COM1 and is used for PC
Programming of the FMS(2/4)-U13 ETU. The PC can
be connected directly or via an external modem.
✆
J2 and J3 are not used.
5.6.6 Installation Precautions
The ETUs used in this system make extensive use of
CMOS technology that is very susceptible to static
electricity. Static discharge must be avoided when
handling ETUs. Always use the following precautions:
✆
Wear a grounding strap anytime you handle the ETU.
✆
Make all ETU DIP switch setting changes before
inserting it in the KSU. Ensure that Make Busy switch
is off.
✆
Carry ETU in a conductive polyethylene bag to
prevent static electricity damage.
Xen Master & Xen Axis
Installing Electronic Telephone Units