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To calculate the maximum current, the following equation should be used:
ZIC-4A Total Current = ZIC-4A Standby Current + [Zone 1 Usage Req. (See Table above) + Class A current (if Class A)]
Example 1: If a ZIC-4A has the following ZICCkt setting:
ZICCkt#1 — Speaker Zone, Class A
ZICCkt#2 — Speaker Zone, Class A
ZICCkt#3 — Speaker Zone, Class A
ZICCkt#4 — Speaker Zone, Class A
By applying the equation above, the maximum current requirement for this card will be determined.
Max Current = 89 + (34 + 6) +(34 + 6) +(34 + 6) +(34 + 6) = 249mA (worst case).
Example 2: If a ZIC-4A has the following ZICCkt setting:
ZICCkt#1 — NAC, Class B
ZICCkt#2 — Strobe Sync, Class A
ZICCkt#3 — NAC-Coded, Class B
ZICCkt#4 — Not Used
Max Current = 89 + (17 + 0) +(17 + 6) +(17 + 0) +(0 + 0) = 146mA.
CONFIGURATIONS
Bell Follower
Siemens Industry, Inc.
Building Technologies Division
+ [Zone 2 Usage Req. (See Table above) + Class A current (if Class A)]
+ [Zone 3 Usage Req. (See Table above) + Class A current (if Class A)]
+ [Zone 4 Usage Req. (See Table above) + Class A current (if Class A)]
The ZIC-4A zones can be configured for the following usages (Refer to Figures 6 - 16):
Notification Applicance (NFPA 72)
Municipal Tie (NFPA 72)
Leased Line (NFPA 72)
Releasing Service (NFPA 13 and NFPA 2001)
Bell Follower
Single-Channel and Two-Channel Audio
Single-Channel and Two-Channel Audio and Strobe
(Refer to Figure 11) When the ZIC-4A zones are configured as a bell follower, it
follows a signal that comes from another reverse polarity source. The zones can be
set as a Bell Follower-Primary or Bell Follower-Secondary.
The Bell Follower-Primary receives an input (it can be NAC output of another panel,
etc), converts it to a TTL signal and then sends it to the Bell Sync Bus of the CC-5
which is monitored by the card with Bell Follower-Secondary configuration. Bell
Follower-Primary can be configured on Zone 1 only. Once Zone 1 is configured as a
Bell Follower-Primary, its zone output is not used. There can only be one Bell Fol-
lower-Primary per enclosure. CC-5 Sync Bus transfers from card cage to card cage.
The ZIC-4A card monitors the Bell Sync Bus if any one of its zones is configured as
Bell Follower-Secondary. Once a HI is detected, the card activates the Bell Follower-
Secondary zone and continuously monitors this signal until it goes LO. Then the ZIC-
4A card de-activates the Bell Follower-Secondary. The zone inputs of the Bell Fol-
lower-Secondary are monitored for presence of input voltage (<20VDC) and its
output is supervised for short and open while the zone is in supervision.
11
P/N 315-033050-15
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