West Control Solutions N6600 - Manual (Page 80)

1.3.4 RTD Inputs
The compensating lead should be connected to Terminal 4 ( 1
16
-DIN Controllers) or
Terminal 3 ( 1
8
-DIN Controllers). For two-wire RTD inputs, Terminals 4 and 5 ( 1
16
-DIN
Controllers) or terminals 2 and 3 ( 1
8
-DIN Controllers) should be linked. The extension
leads should be of copper and the resistance of the wires connecting the
resistance element should not exceed 5 ohms per lead (the leads should be of
equal length).
1.3.5 Dual Setpoint Selection Input
With the Dual Setpoint/Quick Transfer option fitted and Hardware Option
parameter set to duAL (see Subsection 3.2), Terminals 11 and 12 (
1
16
-DIN
Controllers) or Terminals 16 and 17 ( 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/Quick Transfer option and the RS485 Serial
Communications option are mutually exclusive.
1.3.6 Remote Heater Current Transfer Input (Quick Transfer)
With the Dual Setpoint/Quick Transfer option fitted and hardware Option
parameter set to trAn (see Subsection 3.2.2), Terminals 11 and 12 (
1
16
-DIN
Controllers) or Terminals 16 and 17 ( 1
8
-DIN Controllers) are used to instigate
externally transfer of the currently-displayed heater current value to the Heater
Nominal Current parameter (see Volume 1, Subsection 3.2.30). These terminals
may be connected to (a) the voltage-free contacts of a switch or relay, or (b) a
TTL-compatible voltage. The transfer will occur when this input detects an “Open -
Closed” transition in the switch/relay contacts or a rising edge in the TTL level.
TTL-compatible level voltages are as for the Dual Setpoint Selection input (see
above).
NOTE: The Dual Setpoint/Quick Transfer option and the RS485 Serial
Communications option are mutually exclusive.
1.3.7 Heater Current Input
Terminals 7 and 8 ( 1
16
-DIN Controllers) or Terminals 6 and 7 ( 1
8
-DIN Controllers) are
for connection to the secondary winding of an external current transformer, the
1-6 S075-1
PM-0075