The Z396-64 is Kuhnke’s universal timer module designed for plug-in installation into the Z396 11-pin relay socket — a multi-voltage, multi-function timing relay providing 8 selectable timing functions over a time range spanning 0.1 seconds to 10 days from a single wide-range supply voltage of 24–240 VDC/AC, eliminating the need for separate timer modules per voltage or function in machine control panels where diverse timing requirements must be met with minimum component variety.
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What Is the Z396-64?
The Z396-64 is a Kuhnke plug-in timer module that installs directly into the Z396 universal relay socket base, providing programmable timing relay functionality as a drop-in addition to panels already equipped with Z396 socket infrastructure. The module’s multi-voltage design accepts supply voltages from 24 VDC up to 240 VAC within a single unit — eliminating the procurement and stocking complexity of voltage-specific timer modules in facilities operating mixed 24 VDC, 110 VAC, and 230 VAC panel supply voltages.
The Z396-64’s 8 selectable timing functions cover the complete range of industrial timing requirements from a single module type: on-delay, off-delay, interval (single pulse on activation), flasher (symmetrical pulse), and additional function variants selectable via front-panel switches. The time range of 0.1 seconds to 10 days — selectable in multiple ranges via front-panel range switch — covers both the fastest machine cycle timing applications (sub-second conveyor indexing, press cycle timing) and the slowest maintenance interval or batch process timing applications (multi-hour or multi-day timed outputs).
The module mounts in the Z396 socket, which provides the 11-pin connection to the panel wiring — all supply and output wiring connects to the socket’s screw terminals, so the Z396-64 timer module can be replaced without disturbing any panel wiring, a significant advantage for maintenance and troubleshooting in production environments.
Key Technical Specifications
- Model: Z396-64 (also referenced as Z 396.64)
- Supply Voltage: 24–240 VDC/AC (universal multi-voltage)
- Timing Functions: 8 selectable (on-delay, off-delay, interval, flasher and variants)
- Time Range: 0.1 seconds to 10 days (multi-range selectable)
- Compatible Socket: Z396 (11-pin universal socket, screw terminal)
- Output: Relay contact (via Z396 socket — SPDT or DPDT depending on socket configuration)
- Time Setting: Front-panel rotary potentiometer + range selector switch
- Function Selection: Front-panel DIP switch or rotary selector
- LED Indication: Supply and output status LEDs on module front panel
- Operating Temperature: 0°C to +55°C
- Storage Temperature: -25°C to +70°C
- Protection: IP40 (module in socket)
- Approvals: CE marked
Compatibility & System Integration
The Z396-64 is designed exclusively for use with the Kuhnke Z396 11-pin relay socket base — the Z396 socket provides the mechanical mounting, electrical connection, and output relay contact switching for the timer module.
The Z396 socket range includes versions with different output relay configurations (SPDT, DPDT) and mounting options (DIN rail, panel screw mount), all compatible with the Z396-64 timer module. In panels where Kuhnke UF2 or UF3 universal relays are already installed in Z396 sockets, the Z396-64 timer module can be substituted for any relay module in any socket position — the Z396 socket is universal for both relay and timer modules in the Kuhnke UF/Z396 system, enabling a single panel socket infrastructure to support both switching and timing functions without separate socket types.
The Z396-64’s wide voltage range (24–240 VDC/AC) means the same module part number covers both 24 VDC PLC-powered panel circuits and 230 VAC mains-voltage panel circuits — a single Z396-64 stock item covers all panel voltage requirements, simplifying spare parts inventory management. For machine builders supplying equipment to multiple markets with different supply voltages (110 VAC North America, 230 VAC Europe, 24 VDC DC panels), the Z396-64’s multi-voltage design provides a single BOM line item for all markets without market-specific timer module variants.
Maintenance Tips
The Z396-64’s plug-in design into the Z396 socket is its most important maintenance advantage — when a timing fault occurs (timing out of specification, failure to time, or failure to reset), the Z396-64 module can be withdrawn from the socket and substituted with a known-good spare in under 30 seconds without any wiring changes.
Keep at least one Z396-64 spare module per 10 installed units in the panel’s spare parts kit — the module’s compact size and low weight make it practical to store multiple spares in the panel door’s spare parts pocket. When troubleshooting a suspected Z396-64 fault, first verify the supply voltage at the Z396 socket’s supply terminals with a voltmeter before withdrawing the module — a missing or incorrect supply voltage is the most common cause of apparent timer failure and is diagnosed without module removal.
Check the front-panel LEDs: the supply LED confirms the module is receiving power; the output LED confirms the output relay has operated. If the supply LED is off despite confirmed socket supply voltage, the module’s internal electronics have failed and replacement is required. After substituting a Z396-64 replacement module, re-verify the time setting and function selection switches match the original module’s settings — these settings are not stored electronically and must be manually reconfigured on each replacement module to match the original timing parameters.
Frequently Asked Questions
Q: Can the Z396-64 be used as a direct replacement for a Kuhnke UF2 or UF3 relay installed in a Z396 socket, and does it provide relay switching as well as timing?
A: The Z396-64 timer module installs in the same Z396 socket as the UF2 and UF3 relay modules and uses the same 11-pin connection — it is physically interchangeable in the socket. However, the Z396-64 provides timed relay output, not instantaneous relay switching: the output relay operates after the selected time delay (or according to the selected timing function), not immediately on supply voltage application. Substituting a Z396-64 for a UF2/UF3 relay changes the panel function from instantaneous relay switching to timed relay operation — verify that timed operation is the intended function before substituting.
Q: How is the timing accuracy of the Z396-64 affected by supply voltage variation across its 24–240 VDC/AC range?
A: The Z396-64’s internal timing circuit is regulated and temperature-compensated, providing consistent timing accuracy across the full 24–240 VDC/AC supply range. Supply voltage variation within the specified range does not significantly affect the timed interval — timing accuracy is primarily determined by the front-panel potentiometer setting and the module’s internal timing reference, not by supply voltage. Verify the specific timing accuracy specification (typically ±5–10% of full-scale time range) in Kuhnke’s published datasheet for the exact tolerance applicable to the Z396-64’s timing function and range selection.
Q: What is the difference between the Z396-64 and other Z396-series timer variants such as the Z396-60 or Z396-62?
A: The Z396-series timer modules share the same Z396 socket compatibility and multi-voltage supply but differ in the number and type of timing functions and time ranges available. The Z396-64 provides 8 timing functions — the most comprehensive function set in the Z396 timer range — making it the preferred specification when the timing function requirement is not yet fully defined or when multiple machines in a fleet require different timing functions from the same installed socket. Simpler Z396-series variants with fewer functions are available at lower cost when only one or two timing functions are required and the full 8-function capability of the Z396-64 is not needed.
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