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Question
ZEN Programmable Relays: What is the difference between V2, V1 and pre-V1 CPU Units?
Answer
The following table shows the relationship between the versions and functionality of the ZEN CPU Unit and ZEN Support Software.
| Date of upgrade | CPU Unit | Support Software | |
| System software version | Main changes | ||
| January 2002 | Ver. 1.1 | The following functions were added to the displays. A Clear Display function A Day/Month display object (DAT1) | The following functions were added to Ver 2.0 (ZEN-SOFT01-V2). Support for changes to display function Simulation function Improvements to functions, operating procedures, and displays |
| May 2003 | Ver. 2.0 | The number of timers, counters, weekly timers, calendar timers, and display areas was increased from 8 to 16 each and the number of holding timers was increased from 4 to 8. A new CPU Unit with 20 I/O points was added. The input circuits of CPU Units with DC power supply were made compatible with both PNP and NPN. A password input was added to the memory all clear function. The model numbers of CPU Units end in "-V1." | The following functions were added to Ver 3.0 (ZEN-SOFT01-V3). Support for V1 CPU Units with 20 I/O points Support for V1 CPU Units with 10 I/O points |
| February 2006 | Ver. 3.0 | Multiple-day operation and pulse-output operation were added to weekly timers. Twin timer operation was added to the timers. An 8-digit counter and 8-digit comparators were added. The power supply voltage for CPU Units with DC power supplies and the transistor output voltage range was increased to 10.8 to 28.9 VDC. The accuracy of weekly timers and calendar timers was increased to ±15 s or less per month (at 25°C). The accuracy of analog inputs was increased to ±1.5% FS. Daylight Saving Time (DST) settings were added for Australia and New Zealand. Connectable Expansion I/O Units: ZEN-8E1 types only. Economy-type CPU Units and Communications-type CPU Units were added. Use the ZEN-SOFT01-V4 Support Software Note: The model numbers of CPU Units end in "-V2." | Support for the following Units was added to Ver 4.1 (ZENSOFT01-V4). V2 CPU Units with 20 I/O Points V2 CPU Units with 10 I/O points Half-size Expansion I/O Units (-8E1). |
Specifications
| Item | V2 CPU Units | V1 and Pre-V1 CPU Unit | |
| Structure | Heat dissipation slits removed. | --- | |
| Mounting direction | Standard (Vertical) Installation and Horizontal Installation | Standard (Vertical) Installation | |
| Power supply voltage for DC-input Models | 10.8 to 28.8 VDC | 20.4 to 26.4 VDC | |
| Inrush current | CPU Units with AC power supply | 4.5 A max. | 40 A max. |
| CPU Units with DC power supply | 30 A max. | 20 A max. | |
| Time accuracy | ±15 s/month (at 25°C) | ±2 min/month | |
| Internal bits | Timers | Twin operation added. | ON delay, OFF delay, One-shot pulse, and Flashing pulse operation |
| Weekly timers | Multiple-day operation and pulse operation added. | Only normal operation possible. | |
| Additions | 8-Digit counter (150 Hz, 1 counter) 8-Digit comparator | --- | |
| Daylight Saving Time (DST) | Australia and New Zealand added. | Manual, Europe, and America | |
| LCD contrast adjustment | Not required. | Supported. | |
| Menu displays | Node number setting deleted. | --- | |
| Connectable Expansion I/O Units | ZEN-8E1[] (See note.) | ZEN-4E[] and ZEN-8E[] | |
| RS-485 communications | CPU Units with RS-485 communications added (ZEN- 10C4[]R-[]-V2). | None | |
Memory Areas
| Area | CPU Unit | ||||
| V2 CPU Units | V1 CPU Units | Pre-V1 CPU Units | |||
| 10-point | 20-point | 10-point | 20-point | 10-point | |
| CPU Unit input bits (I) | 6 | 12 | 6 | 12 | 6 |
| CPU Unit output bits (Q) | 4 (See note.) | 8 | 4 | 8 | 4 |
| Timers (T) | 16 | 8 | |||
| Holding timers (#) | 8 | 4 | |||
| Counters (C) | 16 | 8 | |||
| Weekly timers (@) | 16 | 8 | |||
| Calendar timers (*) | 16 | 8 | |||
| Displays (D) | 16 | 8 | |||
| Work bits (M) | 16 | ||||
| Holding bits (H) | 16 | ||||
| Expansion I/O Unit input bits (X) | 12 | ||||
| Expansion I/O Unit output bits (Y) | 12 | ||||
| Analog comparators (A) | 4 | ||||
| Comparators (P) | 16 | ||||
| 8-Digit counter (F) | 1 | --- | |||
| 8-Digit comparator (G) | 4 | --- | |||
Note:Output bit Q3 of CPU Units with communications cannot be output externally.
Compatible Combinations of CPU Units and Expansion I/O Units
The Expansion I/O Units that can be connected to V2 CPU Units are different from those that can be connected to V1 CPU Units and previous CPU Units. Expansion I/O Units with AC Inputs cannot be connected to V2 CPU Units with DC Power Supplies.
Expansion I/O Units cannot be connected to Economy-type CPU Units.
| CPU Units | Supported Expansion I/O Units | |||
| Version | CPU Unit type | Power supply | Model | |
| V2 | Standard LCD type LED type Communications type | AC | ZEN-[]C1AR-A-V2 ZEN-[]C2AR-A-V2 ZEN-10C4AR-A-V2 | ZEN-8E1AR ZEN-8E1DR ZEN-8E1DT |
| Standard LCD type LED type | DC | ZEN-[]C1D[]-D-V2 ZEN-[]C2D[]-D-V2 | ZEN-8E1DR ZEN-8E1DT | |
| Economy type | AC | ZEN-[]C3AR-A-V2 | Not supported. | |
| DC | ZEN-[]C3DR-D-V2 | |||
| V1 and Pre-V1 | Standard LCD type LED type | AC | ZEN-[]C1AR-A-V1 ZEN-[]C1AR-A ZEN-[]C2AR-A-V1 ZEN-[]C2AR-A | ZEN-4EA ZEN-4ED ZEN-4ER ZEN-8EAR ZEN-8EDR ZEN-8EDT |
| DC | ZEN-[]C1D[]-D-V1 ZEN-[]C1D[]-D ZEN-[]C2D[]-D-V1 ZEN-[]C2D[]-D | |||
Input Specifications
DC Inputs I0 to I3 on Units with 10 I/O Points, I0 to I9 on Units with 20 I/O Points
| Item | V2 CPU Units | V1 CPU Units | Pre-V1 CPU Units |
| Input voltage range | 10.8 to 28.8 VDC | 20.4 to 26.4 VDC | |
| Input impedance | 5.3 kΩ | 5 kΩ | 4.8 kΩ |
| ON voltage | 8 V | 16 V | |
| Input commons | Independent common terminal | Internally connected to power supply terminal | |
DC Inputs I4 and I5 on Units with 10 I/O Points, Ia and Ib on Units with 20 I/O Points
| Item | V2 CPU Units | V1 and Pre-V1 CPU Units | |
| DC inputs | Input voltage range | 10.8 to 28.8 VDC | 20.4 to 26.4 VDC |
| Input impedance | 5.2 to 5.5 kΩ | 5 kΩ | |
| ON voltage | 8 V | 16 V | |
| OFF voltage | 3 V | 5 V | |
| Analog inputs | Input impedance | 100 kΩ min. | 150 kΩ min. |
| Accuracy | ±1.5% FS (Within rated ambient operating temperature range) | 10% FS (Within rated ambient operating temperature range) | |
Output Specifications
| Item | V2 CPU Units | V1 and Pre-V1 CPU Units |
| Contact current for Models with Relay Outputs | 8 A/contact The total for all outputs for each Unit must be as follows: 10-point CPU Units: 20 A max. Communications-type CPU Units: 15 A max. 20-point CPU Units: 40 A max. | 8 A/contact |
| Maximum voltage for Models with Transistor Outputs | 28.8 VDC | 26.4 VDC |
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