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Remote Input Module
The Remote Input Module (RIM) provides the interface between the ACU Controller and additional alarm
sensors. The RIM consists of the electronic circuit board and the screw terminal connector board connected
together by a ribbon cable. The RIM can be installed in its own tampered enclosure.
Note: The RIM with backplate only is Product Number RIM16-E00.
The RIM with key locked enclosure is Product Number RIM16-E1L.
• When attaching a RIM to a Summit system, please refer to the ACU3 Family Installation and
Operation Guide for the list of input and output assignments.
• Surface Mount (SMT) refers to a method of construction that allows the various module components to
be mounted directly on the surface of the board rather than using the traditional thru-hole method.
• Each RIM provides 16 supervised inputs, 3 unsupervised inputs and 2 relay outputs (wet or dry contact
relays Single Pole Double Throw).
• The Remote Input Module connects to the expansion port on the ACU in the upper addresses (4-7)
only. Each expansion port can support four readers in addition to remote modules (RIM, RRM).
• Each of the 16 alarm inputs is supervised as 6-states, Alarm, Secure, Open, Shorted, Ground and
Circuit Fault.
1
Auxiliary Power Supply for RIM
In many cases, the ACU can supply the power for the RIM. The exception is when using an ACURS with a
plug-in transformer for its power supply. When the ACU can not supply power an auxiliary power supply must
be used. When using an auxiliary power supply, make sure the 0V terminal on all remote modules and the
ACU share a common ground.
The Remote Input Module requires 24 VDC (±15%).
Do not use the relays on the ACU Controller, Remote Reader Electronics (RRE), Remote Input Module
(RIM) or Remote Relay Module (RRM) to switch any voltage above 30 volts. Failure to heed this
WARNING can cause death, personal injury or damage to unit(s).
RS-485 Information
RS-485 is a differential voltage communication circuit. The Impedance is 120 ohms. End-of-line terminators
are required on both ends of the communications path (See Figure 1). Multi-drop configurations are allowed
with a maximum length of 4,000 feet (1,219 meters).
Stubs can be dropped, off the RS-485 cable, but the length of any stub cannot be longer than 10 feet (3
meters). Stubs can connect to ACU Controllers or remote modules (One-Stage reader, RRE, RIM or RRM).
Stubs must not be terminated. We strongly recommend that star configurations be avoided. All remote
modules have built-in terminators that are switch selectable.

Remote Input Module
+24
0V
TT+
RR+
+24
0V
TT+
RR+
+24
0V
TT+
RR+
+24
0V
TT+
RR+
ACUX
Readers
Port
RRE
or
Reader
RRE
or
Reader
RRM
or
RIM
+24
0V
TT+
RR+
RRE
or
Reader
Figure 1. RS-485 Communication Wiring for RRM and RIM as last device
Terminate
Here
Terminate
Here
2
User Manual
RS-485 Wiring

SMT RIM Board Layout
D57
W1
A B C Tx Rx ON
SW1
SW3
SW4
SW2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
1
1
ON
ON
ON
Termination Board
Ribbon Connector
LEDs
J2
+12V 0V +24V
UTC FIRE & SECURITY
REMOTE INPUT MODULE
K1
K2
U3
ON
D52
Figure 2. SMT RIM Component Location
1
See Table 7.
See Table 9.
See Table 8.
W2
See Table 10.
See Table 11.
See Table 11.
TB7
TB8
TB4
IN1
IN1
IN2
IN2
IN3
IN3
IN4
IN4
IN5
IN5
IN6
IN6
IN12
IN12
IN11
IN11
IN10
IN10
IN9
IN9
IN8
IN8
IN7
IN7
IN13
IN13
IN14
IN14
IN15
IN15
IN16
IN16
IN17
GND
IN18
GND
IN19
GND
NO
NC
C
NO
NC
C
+24V
GND
RR+
TT+
UTC FIRE & SECURITY
16-Input Termination
K2
K1
TB9
TB11
TB6
TB5
TB10
TB1
TB2
TB3
See Table 3.
See Table 4.
See Table 1.
See Table 5.
See Table 2.
Termination Board
Ribbon Connector
3
Figure 3. PIN Locations on the Terminal Board of the SMT RIM