Teledyne BDS-3960 Rear Panel Equipment Interface, Analog Outputs, Remote Probe, Range ID Contacts

Introduction BDS 3960

Access Drawer: For access to the BDS Sensor And pressure regulator. The front panel slides out when the four thumb screws are loosened. Opening the interior gives access to most circuit boards too.

1.5Rear Panel (Equipment Interface)

The rear panel, shown in Figure 1-2, contains the gas and electrical connectors for external inlets and outlets. The connectors are described briefly here and in detail in Chapter 3 Installation. Except for gas, AC power, and RS-232 communications I/O, all user connections for analog output, alarms, calibration and remote probe contacts are available through the 50 pin equipment interface connector. User connections made at the rear panel include:

•Power Connection 110 VAC power source (220 VAC

optional.

•Gas Inlet and Outlet One inlet and one exhaust out.

•Moisture By-passAdditional vent line for condensate

• Analog Outputs	0–1 VDC oxygen concentration plus
	0-1 VDC range ID, and isolated
	4–20 mA DC oxygen concentration
	plus 4-20 mA DC range ID.

•Alarm Connections 2 concentration alarms and 1 system alarm.

• Remote Probe	Used in the BDS 3960 for
	controlling external solenoid
	valves only.

•Remote Span/Zero Digital inputs allow external control of analyzer calibration.

•Calibration Contact To notify external equipment that instrument is being calibrated and readings are not monitoring sample.•

Range ID Contacts	Four separate, dedicated, range
	relay contacts. Low, Medium,
	High, Cal.

Teledyne Analytical Instruments 16