4-8
Chapter 4. WIRING
Connection with solid state relay (SSR)
To drive the SSR, a model having voltage pulse outputs (V0, VC, VV, or VD) must
be used.
Generally, the SSR is classified into two groups, constant current type and resistor
type.
Constant current type
The two conditions listed below must be satisfied.
• Input current (maximum): Check that the input current is within the maximum
allowable current or less, then the parallel connection
can be made.
• Operating voltage range: Check that the voltage between the terminals of the
voltage pulse output is within the specified range.
1. Azbil Corporation's PGM10N/PGM10F series
This example shows the calculation for the connection of the SDC35 and the
PGM10N015.
(Note: For connection with other model number, check the specifications of each
model.)
• Input current: Since the input current is 10 mA or less,
up to two units (10 mA × 2 = 20 mA < 24
mA [maximum allowable current]) can be
connected in parallel.
• Operating voltage range (input): The rating voltage is 3.5 to 30 V DC.
Therefore, the voltage between the
terminals is within the range.
Voltage between terminals (two PGM10N units)
= Open voltage - internal resistance × total drive current
= 19 V DC ±15 % - 82 Ω ±0.5 % × 20 mA
15 to 20 V
Connection diagram
This unit
+
–
+
–
PGM10N/PGM10F
+
–
PGM10N/PGM10F
Number of connectable units
SSR to be used Connection
V0/VC/VD model
VV model
Azbil Corporatoin PGM10N Parallel connection Up to 2 units Up to 4 units (Note)
Azbil Corporatoin PGM10F Parallel connection Up to 2 units Up to 4 units (Note)
(Note) 2 units for each output
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