Saia-Burgess
Controls Ltd.
Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Hardware
PCD3.H100
5-74
5
5.6.1 PCD3.H100, Simple counting module
Application
Counting module for frequences up to 20 kHz. This simple module, comprising two
inputs marked “IN-A” and “IN-B” plus one direct countrol output marked “CCO”, allows
counting of the number of revolutions or the calculation of distances (pulses) and the
measurement by counting of pulses within a logical AND window (second input).
Typical areas of application
●
Counting revolutions or distances (impulses)
●
Presetting a count value and switching off output CCO when Counter = 0
●
Measurement by counting: measuring signals counted only when particular
conditions are met, e.g. photoelectric barrier covered
●
Counting with recognition of count direction for incremental shaft encoders
providing simple motion control
Technical data
Number of systems:
1
Counting range:
0...65’535 (16 bit) (can be extended by handling a
counter of the CPU in the application program)
Counting frequency:
max. 20 kHz (at impulse/pause ratio 50 %)
Data protection
All data in this module are volatile.
(non-volatile PCD registers are available).
Digital inputs
“IN-A” and “IN-B” Signal voltages:
rated voltage 24 VDC
“low” range
-30...+5 V
“high” range
+15...30 V for source operation
Input current:
typically 7.5 mA
Input filter:
25 kHz
Process output
Counter Controlled Output CCO:
counter output (switches when count is 0 or 65 535)
Current range:
5...500 mA
(max. current leakage: 1 mA)
(min. load resistance : 48 Ω in
voltage range 5...24 V).
Voltage range:
5...32 V smoothed, residual ripple max. 10%
Circuit type:
electrically coupled, not short circuit protected,
positive switching
Voltage drop:
typically 2 V at 500 mA
Output delay:
< 10 µs,
(longer for inductive load due to
protective diode).
Power supply
External supply:
5...32 VDC, (for supply of CCO output only).
Internal current consumption:
(from +5 V bus)
max. 90 mA
Internal current consumption:
(from V+ bus)
0 mA
External current consumption:
CCO Output load current
Operational conditions
Ambient temperature:
operation 0...+55°C without forced ventilation,
storage -20...+85°C
Interference immunity:
CE mark according to EN 50 081-1 and EN 50082-2
Programming:
Based on PCD user program (PG5) and pre-
programmed functional blocks (FB). For the use with
RIOs other FBs exist.
