3
Terminal connections for the Relay IAM with T-Sense are illustrated
in Figure 3.
Making Electrical Connections
to the Relay IAM with T-Sense
CAUTION: Do not loop wire under terminals. Break wire runs to
provide supervision.
SEE NOTE 6
1
2
3
4
5
6
7
8
N.C.
COMMON
733-886
(4.7K 1/2 W)
733-984
(1.8K 1/2W)
IDNet +
FROM
PREVIOUS
DEVICE
OR F.A.C.P IDNet - R
BN.O.
NOT USED
IDNet +
IF STYLE 4:
TO NEXT
DEVICE
(IF USED)
IF STYLE 6:
TO NEXT
DEVICE
OR F.A.C.P
IDNet - R
B
S
S
OPTIONAL
SHIELD
SEE
NOTES
4, 5 & 7
SEE NOTES 1, 2, & 3
Notes:
1. Maximum allowable run from FACP to farthest device is not to exceed 2,500 feet
(762 meters). Maximum total wire (including all T-Taps) from FACP is 10,000 feet
(3,048 meters). IDNet lines are 18 AWG (0.823 mm/squared) twisted pair (shield
recommended). When using shield, wire nut, splice, or solder the shield wires. Also
insulate shield from the electrical box.
2. The Relay IAM with T-Sense counts as a one-unit load.
3. IDNet wiring is supervised and Power-Limited. An IDNet circuit has a
communications power rating of 36.25 volts (maximum) at .5 A, 3333 Baud.
4. Contractor wiring to relay contacts is unsupervised. Wire to local code (14 AWG
[2.081 mm/squared] recommended with 12 AWG [3.309 mm/squared] maximum).
Relay contacts are rated for 2 A (1 A for inductive load), 30 VDC and .5 A (0.25 A
for inductive load), 120 VAC (non-power-limited). Inductive loads must be
suppressed with a suitable suppression device. If switching 120VAC, the power
source to the contacts should be externally fused by the user with a 1 Amp 250V
quick blow fuse, UL listed to Guide #JDYX – Littlefuse AGC1 or equivalent. For
power-limited operation, power must be provided from a power-limited auxiliary
power output from the FACP or from a power-limited output of a power supply
listed for fire protective signaling use. When both power-limited and non-power-
limited sources are present, use Type FPL, FPLR, or FPLP power-limited cable for
power-limited circuits. If the relay is used to control a fire safety function, it must be
wired within 3 feet (91.44 cm) of the control circuit. Provisions to conform to NEC
760 power-limited and non-power-limited wiring separation must be made in the
field wiring if non-power-limited wiring is used on the relay output.
5. If AC is used on relay terminals, you must add Label 526-831 to electrical box cover
to indicate high voltage, ground electrical box and bracket to safety ground, and
wire input circuit with twisted-shielded wire (shield connected to grounded bracket).
6. T-Sense input circuits are not to exceed 500 feet (152.4 meters). Only Normally
Open (N/O) dry contacts are allowed on the input circuits. T-Sense lines are 18
AWG (0.823 mm/squared) wire. T-Sense inputs are pulled up to 5 VDC by a 17.4 K
resistor, which can source up to 287 uA (supervised and power-limited). T-Sense
inputs may be tested using ¼ watt, 1% resistors as follows: 6.81 K (normal), 16.9 K
(open), 1.65 K (current-limited), & 845 Ohms (shorted).
7. Relay function is programmable.
Figure 3. Relay IAM with T-Sense Connections
