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6.5
Terminals B+ and C- are used to accept the 4-20mA signal from the control system. The
current is repeated into the hazardous area through terminals 4+ and 2-.
6.6
The MTL4-BYP module can provide a pass-through function in the same body package
as the MTL4-ADIO. When necessary, this is able to provide direct 'through' wiring in the
manner shown in the table below.
The MTL4-BYP Bypass module may be used ONLY with General Purpose bases (MTL4-
BSGP or MTL4-BSGPR). A key is built-in to the connector to prevent its insertion into an
IS base.
INM MTL SUM5 Rev 1
Analogue output (AO)
FIELD
10V 14mA
Input/Output
–
Common
Load
(I/P conv)
+
26.5V 90/136mA
Figure 6.5 - Analogue output options
Bypass module
Field wiring
1 & 4
2
3
SYSTEM
MTL4-SD
Loop
Disconnect
1
A
V out
2
Input/
B
Output
Output +
3
MTL4-ADIO
C
Common
Output –
4
MTL4-BSIS
To
—
—
—
Analogue
Output
Current
source
Control wiring
A
B
C
23
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