Page 12
579-1019 Rev M
4009 IDNAC Repeater Installation Instructions
Testing and Troubleshooting
Extended Class A Loop wiring
One Repeater can be wired as part of an extended Class A Loop* Mode Configuration.
NOTE:
To achieve this, a 4100-6103 Dual Class A Isolator (DCAI) must be part of the EPS configuration, see document 579-1029 for more
information. The repeater must be fitted with a Class A Adapter, see document 579-1080 for more information. The 4905-9929 TrueAlert Isolator
+ Module is not supported in extended Class A Mode.
To wire the Repeater as part of an extended Class A loop using the Class A Adaptor, complete the following steps:
1. Route the wire coming from the DCAI to the
A+
and the
A-
inputs (default) on the Class A Adapter terminal block that is attached to the Repeater.
2. Route the wire from the
B+
and the
B-
outputs (default) on the Class A Adapter terminal block to the appropriate inputs on a peripheral
notification appliance.
3. Route the wire from the first appliance to the next one. Repeat this for each device.
4. When all the devices have been added, route the wire back to the DCAI.
I
DNAC IN
+
+
-
-
SHLD
+
+
-
-
TB1
TB2
I
DNAC OUT
PORT A
A+
A-
PORT B
B+
B-
Class A Adapter
Terminal Block
MTAA/
IDNAC
+
-
Appliances
MTAA/
IDNAC
+
-
Appliances
MTAA/
IDNAC
+
-
Appliances
EPS
SLC
Output
Dual
Class A
Isolator
IDNAC
Channel
Repeater
Class A
Adapter
100%
Fig 14: Extended Class A Loop wiring
Testing circuit supervision
Use the following procedures to confirm that the IDNAC and Aux Power output are supervising for opens, shorts, and grounds. The right column in this
table shows the LEDs that illuminate when an open, short, or ground occurs on a specific circuit.
Table 6: Testing circuit supervision
Condition
Wiring configuration
Action
Corresponding LEDs
Class B circuit
Disconnect the IDNAC circuit wiring from the
repeater IDNAC OUT terminal block.
Missing devices reported at the panel. No
indications on the Repeater trouble LEDs.
Local or Extended Class A
Loop circuit
Disconnect the wiring from the Class A
Adapter Port A terminal block.
Class A trouble displayed on the Repeater trouble
LEDs (LED C and D lit).
Open
Aux power output
No supervision for opens.
No supervision for opens.
Class B circuit
Apply a zero ohm jumper across the IDNAC
circuit at the repeater output.
IDNAC Out trouble displayed on the repeater
trouble LEDs (LED A, B and D lit).
Local or Extended Class A
Loop circuit
Apply a zero ohm jumper across the IDNAC
circuit at the Class A Adapter board Port B
terminal block.
Class A trouble displayed on the Repeater trouble
LEDs (LED C and D lit).
Short
Aux power output
Apply a zero ohm jumper across the Aux
output terminal block.
Aux Trouble displayed on the repeater trouble LEDs
(LED A and D lit).
Earth Ground
All wiring configurations
Place a 10K or smaller value resistor from
supervised wiring to Earth ground.
Negative or Positive Earth trouble displayed on the
repeater trouble LEDs. Negative: LED A, B, C lit -
Positive: LED D lit.
