Teledyne 5000B - Near Infrared Photometer - Manual (Page 24)

2-6: Part I
Teledyne Analytical Instruments
1 Introduction Model 5000B
Normally open
Moving contact
Normally closed
Normally open
Moving contact
Figure
2-6: Types of Relay Contacts
The connectors are:
Threshold Alarm 1: • Can be configured as high (actuates when
concentration is above threshold), or low
(actuates when concentration is below thresh old).
• Can be configured as fail-safe or non-fail-safe.
• Can be configured as latching or nonlatching.
• Can be configured out (defeated).
Threshold Alarm 2: • Can be configured as high (actuates when concen-
tration is above threshold), or low (actuates when
concentration is below threshold).
• Can be configured as fail-safe or non-fail-safe.
• Can be configured as latching or nonlatching.
• Can be configured out (defeated).
System Alarm: Actuates when DC power supplied to circuits is
unacceptable in one or more parameters. Permanently
configured as fail-safe and latching. Cannot be de-
feated. Actuates if self test fails.
To reset a System Alarm during installation, discon-
nect power to the instrument and then reconnect it
Further detail can be found in chapter 3, section 3-5.
Digital Remote Cal Inputs
Remote Zero and Span Inputs: The REMOTE SPAN and RE-
MOTE ZERO inputs are on the DIGITAL INPUT terminal block. They