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TELEDYNE INSTRUMENTS
460L Instruction Manual Getting Started
05228 Rev B 15
DCN 5164 PRINTED DOCUMENTS ARE UNCONTROLLED
3.5.3. Control Inputs
Two digital control inputs are also available for use on the 460L. The control inputs are used for
remote control of the 460L by a device such as a PLC. They are labeled ZERO INPUT and AUX
INPUT (see Figure 3-9).
Table 3-
3 Contro
l Inputs
INPUT DESCRIPTION
ZERO INPUT This input performs exactly the same function as the ‘Zero’ buttons on the front panel.
AUX INPUT This input can be used to clear active concentration alarms in similar fashion as the serial
communications ALMACK.
Analo
g
Out +
Analo
g
Out -
Zero Input
Aux Input (AlmAck)
Gnd
Signal I/O
Connector
Figure 3-9 Control Input Connections
NOTE:
Never connect a voltage level output from another device to these contacts.
3.5.4. Relay Outputs
The 460L is equipped with three SPDT relays. They are located at the top right hand side of the
main board and are labeled RELAY 1, RELAY 2 & RELAY 3.
RELAY 1 corresponds to the Sensor OK status output and LED;
RELAY 2 corresponds to the HI concentration alarm, and;
RELAY 3 corresponds to the HI-HI concentration alarm
See Section 11.2.1 for more information on the Sensor OK status output.
See Section 6.2 for more information on these alarms.