West Control Solutions N8100 - Manual (Page 47)

connecting the resistance element should not exceed 5 ohms per lead (the leads
should be of equal resistance).
1.3.5 Linear Inputs
For linear mA input ranges, connection is made to Terminals 4 and 6 ( 1
16
-DIN
controllers) or Terminals 4 and 1 ( 1
4
-DIN & 1
8
-DIN controllers) in the polarity shown in
Figures 1-4 and 1-5. For linear mV and V ranges, connection is made to Terminals
4 and 5 ( 1
16
-DIN controllers) or Terminals 3 and 2 ( 1
4
-DIN & 1
8
-DIN controllers) in the
polarity shown in Figures 1-4 and 1-5. For details of the linear input ranges
available, refer to Appendix A.
1.3.6 Dual Setpoint Selection Input
With the Dual Setpoint option fitted, Terminals 11 and 12 ( 1
16
-DIN controllers) or
Terminals 16 and 17 ( 1
4
-DIN & 1
8
-DIN controllers) are used for external selection of
the active setpoint. These terminals may be connected to (a) the voltage-free
contacts of a switch or relay, or (b) a TTL-compatible voltage. Setpoint selection is
as follows:
Voltage-Free: Contacts open - Setpoint 1 selected
Contacts closed - Setpoint 2 selected
TTL-compatible: >2.0V - Setpoint 1 selected
<0.8V - Setpoint 2 selected
NOTE: The Dual Setpoint option and the RS485 Serial Communications
option are mutually exclusive.
1.3.7 Relay Outputs
The contacts are rated at 2A resistive at 120/240V AC.
1.3.8 SSR Drive Outputs
These outputs produce a time-proportioned non-isolated DC signal (0 - 4.2V
nominal into 1k Ω minimum).
1.3.9 Solid State Outputs
These outputs provide up to 1A AC drive with a longer lifetime than an
electromechanical relay. For further details, refer to Appendix A.
1.3.10 DC Outputs
See Appendix A.
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