Janus JFS-A1 - Repeater Output; Configuration Characteristics; Maximum Wire Resistance Formula

Page: 98
JFS-A1 INSTALLATION, OPERATION, AND INSTRUCTION MANUAL
Document #: DOC230
Issued: August 27, 2012
Revised: N/A
Repeater Output
e PSN-1000/PSN-1000(E) repeater output provides power which supports additional P-Link devices, including LCD
Annunciators and/or SLC Loop expanders. is is possible because the P-Link repeater output reconditions and repeats
all P-Link communications. Refer to the following gures for examples of Class A and B wiring.
CongurationCharacteristics
y PSN-1000 current rating is one (1) amp.
y PSN-1000 voltage rating is 24 VDC.
y e maximum wire length is 6,500 feet.
y Wiring is fully supervised and power limited.
Maximum Wire Resistance Formula
e maximum resistance is based on the load placed on the circuit. To calculate the maximum wire resistance, use
the following formula:
(Total Annunciator Alarm Current) x (Wire Resistance) < 6 Volts
Note:
Any connection to ground of 0 ohms will be annunciated as a ground fault.
Figure 124. P-Link Class B (Repeater) Wiring Example
Figure 125. P-Link Class A Wiring Example
DWG #602-28
- I1 + - NAC 1 + - NAC 5 + - NAC 3 +
-
+ A B
- I2 + - NAC 2 + - NAC 4 + - NAC 6 +
-
+ A B
P-LINK
To the next device
- + A B
Expansion
Device
- + A B
Expansion
Device
- I1 + - NAC 1 + - NAC 5 + - NAC 3 +
- + A B
- I2 + - NAC 2 + - NAC 4 + - NAC 6 +
-
+ A B
P-LINK
- + A B
Expansion
Device
- + A B
Expansion
Device
DWG #602-29