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SET-UP OF THE UCM-420A AS A SIGNAL GENERATOR
G
(SEE PAGE 12)
The UCM-420A may be used as a 4-20 mA signal generator with no input or setpoint signals. This allows equipment
driven by the UCM-420A to be calibrated before system start-up. This mode of operation supplies a 4-20 mA signal in
1 mA steps. If the UCM-420A is installed when the signal generator mode is to be used, wiring should be done in
accordance with the proper wiring diagram for the mode of operation for which the UCM-420A is to be used. If the
UCM-420A is not installed when the signal generator mode is to be used, wire per the wiring diagram below.
WIRING OF THE UCM-420A AS A 4-20 MA SIGNAL GENERATOR
MUX
B3
B4
B5
ADDR
0
0
0
1
0
0
1
2
0
1
0
3
0
1
1
4
1
0
0
5
1
0
1
6
1
1
0
7
1
1
1
8
"1" MEANS
TURN SWITCH ON
SWITCH OFF
A3
REVERSE ACTING
A2
BOTH OFF >> REMOTE SETPT
A1
SAMPLE AND HOLD MODE
B1
BOTH OFF >> ANALOG
B2
REMOTE SETPOINT
STEP
Remove power from the UCM-420A.
G-1
STEP
Set all sixteen DIP switches in the "OFF" position.
G-2
STEP
Power up the unit. The status LED will flash RED and the output will go to 4 mA.
G-3
Any even mA value can then be output by turning on the DIP switch shown in TABLE 28. The
STEP
UCM-420A will output a signal for the highest value switch that is turned on; the status of lower
value switches makes no difference. For example, if all switches are off except A6 and A5, the
G-4
UCM-420A will output the value for A6 which is 10 mA.
UCM-420A
A
TIME
PROP
BASE
B6
B7
B8
A6
A7
A8
T.R.
2.65
0
0
0
0
0
0
10%
5.2
0
0
1
0
0
1
20%
B
12.85
0
1
0
0
1
0
35%
25.6
0
1
1
0
1
1
50%
.59-2.93
1
X
X
1
0
0
65%
1
0
1
80%
RESET
1
1
0
90%
A4
A5
PER MIN
1
1
1
100%
OFF
0
0
1
0
1
0.5
2
"0" MEANS
1
1
0
3
TURN SWITCH OFF
1
1
2
4
5
SWITCH ON
6
DIRECT ACTING
7
8
LOCAL SETPT ENABLE
9
REMOTE SETPT ENABLE
10
PWM REM SETPT SGLE UNIT
11
12
PWM REM SETPT MUX MODE
Set-Up Instructions (Cont.)
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
STATUS
PWM
INPUT
PWM
INPUT
REM SPT
INPUT
LOC SPT
POT +
LOC SPT
INPUT
LOC SPT
POT –
FEEDBK
INPUT
24 PWR
COMMON
MA SIG
OUTPUT
29
LED INDICATION
Dark
- Power Loss
Slow Red Blink
- Signal Generator
Mode Selected
+
24 VAC OR 24 VDC POWER
–
4-20 MA SIGNAL
OUTPUT
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