Form-C Relays With Crm-4Rk/Cre-4 - Notifier NFS-3030/E Installation Manual

Section 3 Installation

3.11 Form-C Relays with CRM-4RK/CRE-4

32
Figure 20 Field-Wiring a CRM-4RK or CRE-4 Module
* Optional CRE-4 Control Relay Expander. Positions E, F, G and H
are active only with this board installed.
1. These Form-C gold-plated, silver alloy relay contacts are for
medium duty switching or Pilot Duty.
2. UL contact ratings are 5 amps @ 125 volts AC (resistive) or 30
volts DC (resistive) and 2 amps @ 125 volts AC (inductive).
3. Activation of a CRM-4 or CRE-4 relay occurs automatically
when an alarm is detected on a selected (programmed)
Initiating Device Circuit.
Note: Refer to the Power-limited label located on the FACP door.
Make a notation on the label for each circuit being employed as a
Nonpower-limited circuit. (Refer to the example on the label).
Typical Form-C Control Relay in Normal Position
Nonpower-limited and power-limited wiring must have a minimum
distance of 0.25" wire to wire and must enter and exit from different
knockouts. If this module is used to drive nonpower-limited and
power-limited circuits, please follow the instructions:
1. Skip a set of dry contacts to maintain the 0.25" required space
between power-limited and nonpower-limited circuits. The
wiring of this module must follow UL Power-limited Wiring
Requirements (see Section 3.16 "UL Power-limited Wiring
Requirements").
2. If this module is needed to drive power-limited and nonpower-
limited relays that are next to each other, refer to the figure to
the left showing a typical connection.
Note: For limitations on the total current available for any group of
Notification Appliance Circuits (NACs), see Section 3.13
"Notification Appliance Circuit Current Limitations" on Page 35, as
well as the manual for your system's power supply.
Form-C Relays on the CPU
N.O. N.C.
OR
NFS-3030 Installation PN 51330:C 10/28/2003
C.