ViewSmart 200/2050/2150 Controller User's Manual
Document: UM-1021
Revision Level B
20
SECTION 3
3.0
MOTHERBOARD INTERFACE PCB # 10-0215
The ViewSmart 200 Motherboard shown below in Figure 3.1 is the interface between the
Display / CPU assembly and all other system I/O devices. The Display / CPU assembly
attaches to the motherboard with 4-standoffs and connects via ribbon cable to S1.
Several input options, described in the following sections, are available that may be
installed into the
Sensor Input Option
P1 connector located on the lower left side of the
motherboard. The middle position P2 connector is for the 10-0223 4-20mA Output
option and the right position P3 connector is for the 10-0222 Discrete Relay option.
Other option devices such as Modbus RTU RS-485, Ethernet and a data logger may also
be installed to connectors located on the Motherboard.
The Motherboard PCB contains a 24 VDC universal input (100-240 VAC) switching
power supply with up to 350mA available at TB3 Auxiliary Power Output terminals. If
AC power is unavailable, or if a DC battery back-up supply is needed, TB1 provides
terminals for DC power input. Blocking diodes isolate internal and external DC supplies
as shown in Figure 3.0. See section 1.2.1 for additional power source information.
To Local
Controller
Circuits
TB3
+
OUTPUT
-
POWER
AUX
1
2
DC PWR
+
SUPPLY
-
INPUT
1
2
AC POWER
L1
GND
L2
100-240 VAC
TB1
+
DC Out
AC In
Universal Input
Power Supply
2-Amp
250V
Fuse
3
2
1
TB5
2 Amp, 250V, 5x20mm fuse located under
terminal cover.
WARNING:
For continued protection against
fire replace only with same type and rating
of fuse.
SHOCK HAZARD
RISK OF ELECTRICAL
SHOCK-DISCONNECT OR
TURN OFF POWER
BEFORE SERVICING THE
EQUIPMENT
~
.45A 50/60 Hz
(only with AC Primary Power)
To optional 10-0221 AI
24VDC Terminals
Figure 3.0
TB2 offers field terminals for a remote alarm reset switch. The motherboard also
includes alarm relays 1 & 2 (K1 & K2) and their indicating LED’s. TB4 provides field
wiring terminals for these relays. TB5 is for connection to the 100-240 VAC power
source. J2 is a 2-pin connector for powering the optional part # 1000-1892 audible
annunciator.
