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Equipment Manual: Encoder 1000-1161
Document #: 1050-1475
Revision: F
The pins are connected to an internal relay of the Encoder. The relay contacts are rated at 0.3A max,
24VDC.
The alarm/status relay connections are set by the following conditions:
•
Encoder bypassed (from power loss, front panel switch, or remote control)
•
Encoder over-temp
•
Encoder license expired
•
Time Board Error
•
Encoder fatal system error (e.g. boot failure, DSP failure, FPGA failure, etc.)
•
Other conditions as set by updated software features
3.5. Theory of Operation for the Status and Control Relays
The SGE remote status and control relays all operate as described below and illustrated in Figure 9.
This includes:
•
The remote bypass monitoring relay (See Step 8 in Section 2)
•
The remote bypass control relay (Section 3.3.4)
•
The remote alarm/status monitoring relay (Section 3.4)
Within the Encoder, the alarm and encoding relays receive signals from the microcontroller and the
contacts close or open, indicating appropriate condition at the pins of the DB9 interface.
The voltage applied at the remote control interface pins (1 and 6) is sent to an optically isolated
translator which is fed to the Encoder controller input similar to the front panel switch signal.
The Encoder begins to encode only if the remote bypass control pins AND the front panel bypass
switch are in enable modes. Otherwise, the Encoder remains in bypass mode.
The Encoder controller de-energizes the bypass relays and connects the corresponding input and
output connector through the Normally Closed (NC) path of the relay.
CONFIDENTIAL AND PROPRIETARY INFORMATION
Copyright © 2014 The Nielsen Company. All rights reserved.
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