Installation guide
Digital Monitoring Products XR2500F Installation Guide
6
INTRODUCTION
XR2500F Installation Guide Digital Monitoring Products
7
INTRODUCTION
Two 866 NAC Modules
5.1 Description
Each 866 provides one style W indicating circuit for supervising UL polarized notication appliances, such as
bells, strobes, and horns. See Table 1: Notication Appliances for a list of approved notication appliances.
5.2 Connection
Each 866 module is pre-installed on the removable backplate using the standard three-hole conguration.
The modules are factory pre-wired to each other, the 504-24, and the XR2500F panel. Refer to the gure
below and to Figure 2: XR2500F System for wiring connections.
You can connect 24 VDC Notication Appliances to terminals 5 and 6 of each module. Each module provides
a zone of notication and can be activated separately.
Figure 5: 866 Modules Wiring
5.3 Bell Silence/Bell Trouble
A bell silence switch on the 866 module is provided to prevent indicating devices from sounding during
system testing. When the Silence position is selected, a 15-second delay occurs before the 866 bell trouble
contacts (terminals 7 and 8) open. Select the Normal position after testing to return the 866 module to
normal operation.