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IMS-4000 Manual
IMS-4851 4–20mA Bridge
Installation Instructions
Introduction
The IMS-4000 4–20mA Bridge allows you to
connect a 4–20mA transducer to your IMS-4000
Host or Node. The 4–20mA Bridge features optical
isolation between the input and the IMS-4000,
which ensures trouble-free operation and safety.
The electrical connection between the bridge and
IMS-4000 is made via RJ-45 patch cable (not
included). The bridge may be mounted either on a
wall or rest on the floor.
Package Contents
(1) IMS-4851 4–20mA Bridge
(2) Plastic drywall anchors
(2) #6 Metal tapping screws
(4) Rubber feet
Wiring the Transducer
Connect your 4-20mA transducer to the terminal block labeled Input as shown in the figure below.
Insert
1
/
" stripped bare wire into the slot and tighten the screw. The Current Flow light will glow
2
steadily when current is flowing into the bridge from the transducer. Note that a 4-20mA transduc-
er typically requires you to have an external DC power supply for the transducer. A 24VDC supply
is available from Sensaphone (FGD-0053).
Cabling
The 4-20mA Bridge connects to the IMS-4000 Host or Node via an RJ-45 cable (e.g. CAT5 cable).
The connection from the sensor to the Host or Node can utilize your existing network wiring infra-
structure. For example, the bridge may be installed in another room or another floor. Connect the
bridge to your structured wiring network via an RJ-45 jack. At the other end, connect a patch cable
from your structured wiring patch panel directly to the Host or Node environment input.
134
Figure 1: 4–20mA transducer wiring to IMS-4851 Terminal Block
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