Honeywell X-618 Installation Manual page 25

Control interfaces of standby amplifier should connect to standby ports of DCS. In the "single
standby amplifier" mode, the control interface of the amplifier should connect to the standby PA1/2
port of the DCS, and 1070V output interface of the standby amplifier should connect to the standby
PA input 1 and 2 ports (parallel connection) of the DCS. If the double standby amplifier mode is
used, the standby channels should be set to 2 or 4 channels, the control interface of the amplifier
should connect to the standby PA1/2 port of DCS. When the standby channel is single channel, the
control interface of 2 amplifiers should separately connect to the standby PA1/2 port and the
standby PA 2 port. The output ports of the standby amplifier should connect to the standby PA
input port of the DCS, and the control interface should also correspond to each other.
Connecting the Dry Contacts (Optional)
This section describes connecting the external equipment or switch through the dry contacts.
DCS Dry Contact Input Preparation
1. Connect the dry contact cable with diameter of 0.5 to 1.5mm to the dry contact input terminal.
Strip the wire jacket off one end of the prepared dry contact connection cable by about 10mm,
insert the wires into the dry contact wiring terminal, and tighten the screws.
2. Insert the dry contact input wiring terminal of the installed input cable into the DCS dry contact
port, and connect the external dry contact equipment or switch to the other end of the dry
contact input cable.
Dry contact input port of the X-DCS3000 has the capability of line supervision, it can connect to the
fire alarm system or other third party system. The connection method remains same as above
even when the function of dry contact supervision is disabled. If dry contact supervision function is
enabled, the output port of the third party device should be connected to resistances, as shown in
Figure 17.
NRI Dry Contact Input Preparation
The NRI dry contact inputs are used to connect the fire alarm system, to realize the public address
override. The connection mode of the dry contact cable is similar to DCS, but in order to meet the
dry contact cable supervision need, the dry contact cable supervision requires 20K of resistance.
Figure 16 External Dry Contact or Switch
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