Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 112)

Model 9110TH NOx Analyzer Operating Instructions
Teledyne Analytical Instruments 92
4.11.5. RS-232 COM PORT CABLE CONNECTIONS
In its default configuration, the 9110TH/M analyzer has two available RS-232 com ports
accessible via 2 DB-9 connectors on the back panel of the instrument. The COM1
connector, labeled RS232, is a male DB-9 connector and the COM2 is a female DB9
connector.
Figure 4-5: Default Pin Assignments for Rear Panel com Port Connectors (RS-232 DCE & DTE)
The signals from these two connectors are routed from the motherboard via a wiring
harness to two 10-pin connectors on the CPU card, J11 (COM1) and J12 (COM2).