Nautel NX100, Руководство по предварительной установке

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NX100 Pre-installation Manual Planning control/monitor connections
Issue 3.2 2017-03-31 Page 8-7
External switching circuit requirements
The switching circuits for the remotely controlled functions must be the equivalent of a normally
open (momentary) switch. The switches must be configured to operate as a single-ended input using
the transmitter's 15 V dc as the source, or as a differential input using an external dc power supply
(12 - 18 V) applied to J6-7 or J6-8. The control/interface PWB contains a selection circuit that allows
you to select internal (single-ended, see Option 1) or external (differential, see Option 2) dc power
supply for all remote inputs.
Inputs are toggled between states by an active pulse unless otherwise noted. To ensure proper
operation, the duration of the active pulse should be a minimum of 250 ms. Refer to the
NX100
Operations and Maintenance Manual to see the various logic control options for remote inputs.
Option 1 - Single Ended Input (Internal dc supply).
When you use the transmitter's 15 V as
the current source for a control function's opto coupler, configure the circuits on the control/
interface PWB for single ended inputs (see
Figure 8.2 ). The
INT/EXT
3-pin header (E3) must have its
2-socket shunt post connected between pins 2 and 3 to configure the circuit.
Figure 8.2: Single-Ended Input Selected
When the remote input is configured for logic ‘0’, a negative logic (current-sink-to-ground) command
must be applied to the appropriate remote input (1 through 16). To avoid a ground loop, obtain the
ground from the remote interface PWB (J7-1 or 5, J8-1 or 5, or J9-1 or 5).
Option 2 - Differential Input (External dc supply).
When you use an external dc voltage
(12 V to 18 V) as the current source for a control function's opto coupler, configure the control
function's external switching circuit and the control/interface PWB’s selection circuit for a
differential input (see
Figure 8.3 on page 8-8 ). The
INT/EXT
3-pin header (E3) must have its 2-socket
shunt post connected between pins 1 and 2 to configure the circuit.
GND
01 16
E3
1
S2070500 V1
TO
J6-7/8
+15 V INPUT
INT
DC SUPPLY
INTERFACE
CONTROL/
J6-5/6
2
3
+15V
PWB
CONFIGURED FOR INTERNAL
DIGITAL INPUT (01 TO 16)
INTERFACE
REMOTE
REMOTE SELECTION CIRCUITRY
PWB