Figure 3-5 Interconnections Between Sensing Unit, Controller, And Indicator - Honeywell 7866 Operation And Maintenance Manual

Wiring Connections at the Digital Controller
The output signal from the 7866 Digital Controller can be configured as a 4-20 milliampere signal or a 0-
20 milliampere signal. This signal is used to drive a recording device or to report to a DCS or PLC. The
signal will proportionately reflect the percentage of measured gas. Typically, the signal will be at minimum
value (0 mA or 4 mA) when the display reads 0.0 %. The signal will be at 20 mA when the display reads
100.0 %. The analog output can support a total resistive load of 1000 ohms at maximum.
PV Output
0-20 or 4-20 mA
Range Output
0-20 or 4-20 mA

Figure 3-5 Interconnections Between Sensing Unit, Controller, and Indicator

AWG
9/06 7866 Triple Range Digital H
Power Supply 30 Vdc/30 Watt
120 Vac/60 Hz Input Power
Model Number B30GT110
230 Vac/50 Hz Input Power
Model Number B30GT110-230
+ -
10
11
L1
L2/N 12
13
4
14
5
15
6
16
7
17
8
18
9
10
11
L1
12
L2/N
13
4
14 Alarm 2
5
15
6
16
7
17 Alarm 1
8
18
9
Digital Indicator
REQUIRED WIRE SIZE FOR INTERCONNECTION CABLE
18
16
14
12
and CO
2
19
Sensor 20
Range
21
22
23
Alarm 2
24
25
26
Alarm 1
Sensor
Input
27
Digital Controller
28
19
29
20
30
21
31
22
+ 32
23
Range
Input
- 33
24
34
25
+ 35
26
PV
Input
- 36
27
MAX. COND. LENGTH
427 FT (130 M)
689 FT (210 M)
1082 FT (330 M)
1706 FT (520 M)
Analyzer/Indicator - Operation and Maintenance
2
12
Sensing Unit
13
Terminal Strip
14
(Top View)
9
28
29
30
31
32
33
34
+ 35
- 36
250 Ohm
250 Ohm
250 Ohm
Installation
29