Micromod MOD: 1732N, 1733N External Mini-Link Users Guide - Manual (Page 13)

IB-23C004
INSTALLATION
Clear-To-Send (CTS) for Serial Ports A and B
Both serial ports are outfitted with a CTS connection. In most cases, the CTS signal will
not be needed. In the event that your configuration requires a CTS signal, install jumpers
W16 and/or W17 as follows:
W16 Enables Clear To Send on Serial Port A (DB9)
W17 Enables Clear To Send on Serial Port B (DB25)
RS-232 Test Signal Jumper
Jumper W18 provides access to the 5V power plane of the External Mini Link. If Jumper
W18 is connected, the 5V signal will appear on pin 9 of the RS-232 Port A connector.
This jumper will normally be used for test purposes only.
2.3.2 ICN
ICN Isolation
The External Mini Link is fitted with opto-isolation components capable of providing a
minimum of 3000 VDC electrical insulation between the Instrument Communication
Network and the serial port circuitry. This option is jumper-selectable by disabling the
connection on W1 (remove this jumper to enable optical isolation). If optical isolation is
enabled, the ICN connector must be fitted with a ground wire. This third wire should be
secured to a GROUND TERMINAL on the termination panel.
External Mini Link ICN Device Address
Each device on a given Instrument Communication Network must be assigned a unique
address between 0 and 15. Normally, the External Mini Link will be assigned an address of
0 (Factory Set) with the instruments starting at 1, 2, 3, etc. In the case where the factory-
set device address is not suitable, use switch U1 to change the address for the ICN0 and
ICN1 boards.
ICN Baud Rate
The factory-set baud rate for instrument communication over the ICN is 31,250 bps. This
baud rate can be increased to 62,500 bps as follows:
ICN0
J2 Installed – Selects ICN0 Baud Rate of 31,250 bps
J3 Installed – Selects ICN0 Baud Rate of 62,500 bps
ICN1
J2 Installed – Selects ICN1 Baud Rate of 31,250 bps
J3 Installed – Selects ICN1 Baud Rate of 62,500 bps
2.4 LOCATING MINI LINK/EXT
The External Mini Link can be located on any flat surface near a personal computer and
power source. Figure 2-1 shows the mounting dimensions for the External Mini Link.
2-3