Autronica AutoPath HC800 - Page 24

Line of Sight Infrared Hydrocarbon Gas Detector AutroPath HC800 , 116-P-HC800/IGB, Rev. A, 2016-03-03
P/N 95-8744, v4.2 , rev. 3/16
Autronica Fire and Security AS
Page 20
NOTE
For proper HART communication, it is required
that an analog signal loop resistance of 250 to
500 ohms be present at the receiver analog
output terminals. For AutroPath HC800 systems
using HART communication, the maximum wiring
distance is 2,000 feet. No external resistance
needs to be added to the transmitter wiring for
proper HART operation.
A pair of HART connector pins is provided for ease in
connecting a HART handheld device. See Figure 22
for location.
NOTE
To establish the optional “communication link”
between the transmitter and receiver, connect a
three-wire shielded cable to the INTR A, INTR B,
and INTR GND terminals of the two devices. See
Figure 21. Take care not to connect any of these
lines to 0V COM. Doing so will damage the 4–20
mA circuit and make the device susceptible to
surge.
SPARE
RS-485 B
INTR B
SHIELD
SHIELD
0V COM
0V COM
8
7
6
5
4
3
2
INTR GND
RS-485 A
INTR A
SHIELD
SHIELD
+24 VDC
+24 VDC
17
16
15
14
13
12
18
A2646
HART
Figure 12—Transmitter Wiring Terminal Identication
–mA
RESET/CAL
RS-485 B
INTR B
SHIELD
SHIELD
0V COM
0V COM
0V COM
1
2
3
4
5
6
7
8
9
+mA
INTR GND
RS-485 A
INTR A
SHIELD
SHIELD
+24 VDC
SPARE
+24 VDC
11
12
13
14
15
16
17
18
19
HI ALARM NO
LO ALARM NO
HI ALARM NC
LO ALARM NC
HI ALARM COM
LO ALARM COM
FAULT NO
FAULT COM
FAULT NC
21
22
23
24
25
26
27
28
29
B2643
HART
Figure 13—Wiring Terminal Identication for AutroPath HC800 Receiver with Relays
Figure 14—Terminal Strip Located Inside Wiring Compartment
–mA
CAL
RS-485 B
INTR B
SHIELD
SHIELD
0V COM
0V COM
0V COM
1
2
3
4
5
6
7
8
9
+mA
INTR GND
RS-485 A
INTR A
SHIELD
SHIELD
+24 VDC
SPARE
+24 VDC
11
12
13
14
15
16
17
18
19
B2645
HART
Figure 15—Wiring Terminal Identication for AutroPath HC800
Receiver without Relays