20 MA
16 MA
12 MA
4 MA
8 MA
0.1
0.1
0.1
0.1
0.59
0.66
1.3
3.21
6.4
1.18
1.33
2.6
6.43
12.8
1.76
1.99
3.9
9.64
38.4
4.69
2.65
5.2
12.85
25.6
2.93
This table provides the output signal
corresponding to various input pulses
for the different time bases available.
See "Multiplexed Operation" on
page 11 for a description of the
UCM-420A operation in the
multiplexed mode.
Multiplex Address
Switch B3
Switch B4
Switch B5
1
OFF
OFF
OFF
2
OFF
OFF
ON
3
OFF
ON
OFF
4
OFF
ON
ON
5
ON
OFF
OFF
6
ON
OFF
ON
7
ON
ON
OFF
8
ON
ON
ON
PWM
INPUT
PWM
INPUT
REM SPT
INPUT
LOC SPT
POT +
LOC SPT
INPUT
LOC SPT
POT –
COMMON
MA SIG
OUTPUT
1
2
3
4
5
6
7
8
9
10
11
12
B3
0
0
0
0
1
1
1
1
B6
0
0
0
0
1
B7
0
0
1
1
X
B8
0
1
0
1
X
B4
0
0
1
1
0
0
1
1
B5
0
1
0
1
0
1
0
1
MUX
ADDR
1
2
3
4
5
6
7
8
A6
0
0
0
0
1
1
1
1
A7
0
0
1
1
0
0
1
1
A8
0
1
0
1
0
1
0
1
PROP
T.R.
10%
20%
35%
50%
65%
80%
90%
100%
UCM-420A
TIME
BASE
2.65
5.2
12.85
25.6
.59-2.93
A4
0
0
1
1
A5
0
1
0
1
RESET
PER MIN
OFF
0.5
1
2
"1" MEANS
TURN SWITCH ON
"0" MEANS
TURN SWITCH OFF
LOCAL
SETPOINT
FEEDBACK
REMOTE
SETPOINT
STATUS
24 VAC OR 24 VDC POWER
4-20 MA SOURCING OUTPUT SIGNAL TO
CONTROLLED DEVICE
24 VAC OR 24 VDC PWM SIGNAL FROM BAS
(ONLY IF REMOTE SETPOINT IS PWM)
CONTACT AT CONTROLLER*
–
+
+
–
+
–
FEEDBK
INPUT
24 PWR
SWITCH OFF
SWITCH ON
A3
A2
A1
B1
B2
REVERSE ACTING
BOTH OFF >> REMOTE SETPT
SAMPLE AND HOLD MODE
BOTH OFF >> ANALOG
REMOTE SETPOINT
DIRECT ACTING
LOCAL SETPT ENABLE
REMOTE SETPT ENABLE
PWM REM SETPT SGLE UNIT
PWM REM SETPT MUX MODE
B
A
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
*NOTE: PWM contact
at controller may
switch either posi-
tive or negative leg
of circuit, and PWM
circuit may use the
same power supply
as the UCM-420A or
a separate power
supply. See the
General Wiring
Diagram Section for
detailed wiring.
28
STEP F-5
THIS CONCLUDES THE SET-UP OF THE UCM-420A AS A PULSE WIDTH TO
4-20 MA CONVERTER. WIRE THE UCM-420A PER THE WIRING DIAGRAM
BELOW AND THE GENERAL WIRING DIAGRAMS.
WIRING OF THE UCM-420A AS A PWM TO 4-20 mA CONVERTER
TABLE 27
See page 25 for LED indication in MUX
Mode
Steady Green
- Power On
Dark
- Power Loss
Steady Red
- PWM Signal Present
LED INDICATION (No MUX)
TABLE 26
Set-Up Instructions (Cont.)
