Watlow Series 945, 1/4 DIN Microprocessor-BasedAuto-tuning Control - Manual (Page 7)

Install and Wire, Chapter 2 7
WATLOW Series 945 User's Manual
Output 1 - Solid State Relay With Contact Suppression
Output 1 Wiring
Mechanical Relay, Form C, 6 Amp
17
16
18
N.O.
COM.
External
Load
Fuse
L1
L2
N.C.
Off state impedance: 20K
Ω
min.
17
16
Switched DC, Open Collector,
Non-Isolated
Logic
Switch
External
Load +
-
+
-
Output 1 - Switched DC Output (Open Collector)
Output 1 - Process, 4 - 20mA
Output 1 - Mechanical Relay, 6 Amp, Form C
945A - _ B _ _ - _ 000
945A - _ C _ _ - _ 000
945A - _ D _ _ - _ 000
Figure 12 -
Switched DC
(Open Collector)
Figure 13 -
6 Amp Mechanical
Relay
NOTE:
Minimum load
resistance is 500 .
Available current is
22mA maximum.
Typical voltage drop
across a 1K load is
12 to 19 volts.
Figure 11 -
Solid State Relay
With Contact
Suppression
NOTE:
This output is
supplied with an arc
suppression snubber
across the output
terminals. High
impedance loads may
remain energized
even though the
output device is
turned OFF.
N.O.
COM.
External
Load
Fuse
L1
L2
18
17
Off state impedance: 31M
Ω
max.
Suppression
Off state impedance: 20K max.
18
17
Process, 4-20 mA, Non-Isolated
External
Load -
+
I
DC
+
-
Load impedance: 600
Ω
max.
945A - _ F _ _ - _ 000
Figure 14 -
Process, 4-20mA