3Com V6100, User Manual Manual, Page: 67 / 496

V6100 and V7122 User Guide
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Figure 29 Dry Contact Wires’ Mate
Table 24 Dry Contact Wires’ Mate Component Descriptions
Item # Component Description
1 Position 4
2 4 spring-cage connections
3 Orange Buttons: Press to open spring-cage connections
4 Position 1
The mate features four spring-cage connections. Positions 4, 3, 2 and 1 (from left to right)
correspond to the four pins in the connector on the CPU module’s front panel.
Users need to supply their own wiring (to be inserted into the mate’s spring-cage
connections) as well as visual and/or audible alarm systems attached at the other end of the
wires. The dry contact connector can utilize wire sizes in the range 20 to 28 AWG.
To set up a dry contact system:
The dry contact alarm provided on the CPU card should be connected only to
SELV (Safety Extra-Low Voltage) non-energy hazard sources (Class 2) as per
UL60950 and EN60950.
1 Insert two wires into the mate’s spring-cage connections in position 4 and 3 (represented
by labels 14 and 15 in
Figure 6 and Figure 29 ). With a sharp, pointed object press the
corresponding orange button in; the cage of the connection opens. Insert the wire into
the connection and release the orange button; the cage closes, locking in the wire.
During normal operation, dry contact labeled
I is open. If a malfunction occurs, dry
contact labeled I closes.
2 Connect two additional wires into the mate’s spring-cage connections in position 2 and 1
(represented by label
II
in Figure 6 ) (see also Figure 29 ). During normal operation, dry
contact labeled
II
is closed. If a malfunction occurs, dry contact labeled
II
opens.