Analog Outputs; Current Outputs - Michell Instruments Optidew User Manual

INSTALLATION
2.3.1

Analog Outputs

The analog output connector is located on the front panel of the Optidew, and on the
rear panel of the Optidew Vision. The electrical connections are shown below:
8 7
15 14
15-Way D Connector
Pin Description
1 Channel 1 Current Output
2 Channel 1 Ground
3 Channel 2 Current Output
4 Channel 2 Ground
5-8 Not Connected
9 Optics Fault / Alarm Relay N/O
10 Optics Fault / Alarm Relay COM
11 Optics Fault / Alarm Relay N/C
12 Status Relay N/O
13 Status Relay COM
14 Status Relay N/C
15 Not Connected
2.3.2

Current Outputs

Two current source outputs are provided which can be set to either 4-20 or 0-20 mA
and scaled by the user over the range –200 to +1000 by using the supplied application
software (see Section 3.4) or by sending the appropriate commands to the instrument
over RS232 or RS485 (see Appendix B).
Channel 1 can be set for dew point, %RH, gm
Channel 2 always outputs temperature.
When the output is under-range, or over-range, the output signal will be 23mA.
8
Optidew
6 5 4 3 2 1
13 12 11 10 9
Optidew Series User's Manual
Optidew Vision
1 2 3 4 7
5 6
12-Way Output Connector
Pin Description
1 Status Relay N/C
2 Status Relay COM
3 Status Relay N/O
4 Optics Fault / Alarm Relay N/C
5 Optics Fault / Alarm Relay COM
6 Optics Fault / Alarm Relay N/O
7 Channel 1 Current Output
8 Channel 1 Ground
9 Channel 2 Current Output
10 Channel 2 Ground
11-12 Screen
, gkg or delta (t-tdp).
-3 -1
97430 Issue 2, March 2017
8 9 10 11 12