6.6
TRLYS1D Relay Output with Solenoid Integrity
Sensing
The Relay Output with Solenoid Integrity Sensing (TRLYS1D) terminal board holds six plug-in magnetic relays. The six
relay circuits are Form-C contact outputs, powered and fused to drive external solenoids. A standard 24 V dc or 125 V dc
source can be used. The board provides special feedback on each relay circuit to detect a bad external solenoid. Sensing is
applied between the NO output terminal and the SOL output terminal.
TRLYS1D is similar to the standard TRLYS1B board except for the following:
•
There are six relays.
•
The board is designed for 24/125 V dc applications only.
•
Relay circuits have a NO contact in the return side as well as the source side.
•
The relays cannot be configured for dry contact use.
•
Input relay coil monitoring is removed.
•
The terminal board provides monitoring of field solenoid integrity.
•
There is no special-use relay for driving an ignition transformer.
TRLYS1D Block Diagram
150
GEH-6855_Vol_II
GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
Public Information