Teledyne 9110T RS-485 operation, ∙ Parity None, RS-232 Multidrop Option 62 Connection

Model 9110T NOx Analyzer Getting Started

RS-232 (COM1): RS-232 (fixed) DB-9 male connector

∙Baud rate: 115200 bits per second (baud)

∙Data Bits: 8 data bits with 1 stop bit

∙Parity: None

COM2: RS-232 (configurable to RS 485), DB-9 female connector

∙Baud rate:19200 bits per second (baud)

∙Data Bits: 8 data bits with 1 stop bit

∙Parity: None

RS-232 MULTIDROP (OPTION 62) CONNECTION

When the RS-232 Multidrop option is installed, connection adjustments and configuration through the menu system are required. This section provides instructions for the internal connection adjustments, then for external connections, and ends with instructions for menu-driven configuration.

Note	Because the RS-232 Multidrop option uses both the RS232 and COM2
	DB9 connectors on the analyzer’s rear panel to connect the chain of
	instruments, COM2 port is no longer available for separate RS-232 or
	RS-485 operation.

ATTENTION	COULD DAMAGE INSTRUMENT AND VOID WARRANTY
	Printed Circuit Assemblies (PCAs) are sensitive to electro-static
	discharges too small to be felt by the human nervous system. Failure to
	use ESD protection when working with electronic assemblies will void
	the instrument warranty. Refer to Section 14 for more information on
	preventing ESD damage.

In each instrument with the Multidrop option there is a shunt jumpering two pins on the serial Multidrop and LVDS printed circuit assembly (PCA), as shown in Figure 3-15. This shunt must be removed from all instruments except that designated as last in the multidrop chain, which must remain terminated. This requires powering off and opening each instrument and making the following adjustments:

1.With NO power to the instrument, remove its top cover and lay the rear panel open for access to the Multidrop/LVDS PCA, which is seated on the CPU.

2.On the Multidrop/LVDS PCA’s JP2 connector, remove the shunt that jumpers Pins 21 ↔ 22 as indicated in. (Do this for all but the last instrument in the chain where the shunt should remain at Pins 21 ↔ 22).

3.Check that the following cable connections are made in all instruments (again refer to Figure 3-15):

∙ J3 on the Multidrop/LVDS PCA to the CPU’s COM1 connector

Teledyne Analytical Instruments 52