Emerson 1410 A/B Quick Start Manual page 14

Quick Start Guide
Installation with barriers
When installing the Emerson 781 in a hazardous area there are two I.S. barriers
that need to be installed: a power barrier and a signal barrier. The signal and the
power are two separate I.S. circuits so they must comply with proper I.S.
segregation distance. When using the Emerson recommended barriers the
input power of the Gateway should be 20–30 VDC, with current capacity of at
least 330 mA.
The signal barrier needs additional power. You can wire it to the Emerson 1410D
terminals or to a separate power supply. Make sure power supply is rated to
handle power drawn for the barrier.
variations of powering the signal barrier.
Figure 10. Emerson 1410D and 781 with Gateway Powered Barrier
A. Emerson Wireless 1410D Gateway
B. Attach shield pair cable (Belden 3084A)
C. Tape back shield wire and foils
D. Short these terminals for 250 Ω
14
Installation
20-30 VDC
Gray line means internal
connection
Red
Blk
B
20-30 VDC
Wht
Data+ Data -
+
-
Safe Area
Data - Data+
Hazardous Area
F
Blu Wht
Data A (+)
D
Data B (-)
Figure 10 and
A
Blu
Wht
Blu Red Blk
G
+ -
- +
C
Blk Red
Return (-)
24 VDC (+)
E
E. Emerson Wireless 781 Field Link
F. I.S. segregation
G. Shield
Figure 11 show the two
May 2018