Yokogawa GD40 Gas Density Detector - Manual (Page 37)

<2. Installation, Wiring and Piping>
2-14
IM 11T3E1-01E
Contact input MAINT
ALM
FAIL
SPAN/FUNC
ZERO/SEL GAS
CONT
INP
FAIL
Contact output
ALARM
Contact output
MAINTENANCE
Contact output
FUNCTION
Contact output
SELECT GAS
Contact output
Power supply
100 to 240 V AC
or 24 V DC
Case grounding
terminal
Case grounding
terminal
GD402 Converter
Isolated 4-20 mA Output
with BRAIN Communication
Isolated 4-20 mA Output
Pressure Transmitter
+
-
+
-
+
-
+
- -
+
+ L or +
-
N or -
+
SHIELD
-
GD40 Detector
14
15
16
17
18
19
20
21
22
23
24
25
1
2
3
4
5
6
7
8
9
10
11
12
13
26
ANLG
OUT1
ANLG
OUT2
SNSR
PWR
SNSR
INP
DET
INP
-
+
Case grounding
terminal
Surge protector
F0215.ai
* 1
Intrinsic safety
Grounding
Class A grounding
* 2
* 4
Terminal Indication
Shield
Requirement
Requirement
MAINTENANCE
Contact output
MAINT Unshielded
ALARM
Contact output
ALM Unshielded
FAIL
Contact output
FAIL Unshielded
FUNCTION
Contact output
SPAN Unshielded
SELECT GAS
Contact output
ZERO Unshielded
Contact input CONT IN Shielded
Analog output1 ANLG OUT1 Shielded
Analog output2 ANLG OUT2 Shielded
Pressure
transmitter input
Detector input
SNSR PWR
SNSR INP
Shielded
DET INP
SHIELD
Shielded
Supply L, N, G Unshielded
For outdoor wiring, cable length should be less than 30 m .
Shield should be grounded at one end only.
* 3
Total resistance should not exceed 50 Ω.
For outdoor wiring, cable length should be less than 30 m .
Shield should be grounded at one end only.
Maximum load resistance including wire resistance is 600Ω . When
BRAIN communication is used, it is 250 to 550 Ω.
* 3
Total resistance should not exceed 50 Ω.
For outdoor wiring, cable length should be less than 30 m .
Shield should be grounded at one end only.
* 3
Total resistance should not exceed 50 Ω.
For outdoor wiring, cable length should be less than 30 m .
Connect shield to SHIELD terminal on converter.
* 3
Cable List
*1 Surge protector is not provided with GD402T/V/R type converter.
*2 Intrinsic safety grounding
GD402V, GD40V; All wiring should comply with Canadian Electrical Code and Local Electrical Codes.
GD402T, GD40T; All wiring should comply with National Electrical Code and ANSI/NFPA 70 and
Local Electrical Codes.
*3 Restriction on cable length does not apply to GD402T/V/R type converter.
*4 When select GD402T/V/R.
(grounding resistance
10 Ω or less)
Figure 2.11 Terminals on the Converter